On Mon, Mar 14, 2005 at 09:11:28PM -0500, Theodore Ts'o <[EMAIL PROTECTED]>
wrote:
> On Thu, Mar 10, 2005 at 10:41:27AM -0500, Bob Bell wrote:
> > The user-visible symptoms of this problem are that after typing in a
> > username and hitting enter, the serial login prompt hangs. I've traced
> > this hang to an ioctl in the login code (TCSETSF, a result of calling
> > tcsetattr(,TCSAFLUSH,)). I've further traced that ioctl to being stuck
> > in tty_wait_until_sent().
>
> It's possible this was caused by a lost transmitter interrupt, so the
> transmit queue never drained; it's also possible that some UART's are
> wired to not signal a transmitter interrupt while the serial port is
> flow controlled. In order to figure out what is going on, you'd have
> to add debugging logic into the interrupt handler as well (i.e.,
> #define SERIAL_DEBUG_INTR).
I've #defined SERIAL_DEBUG_INTR as you indicated. In order to minimize
the impact that might cause, I also #defined printk() to be equivalent
to my debugging routine, dbg_addmsg(). The following was captured
starting after I typing in my username, but before I hit enter:
rs_interrupt_single(4)...status = 61...DR0d:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(1)
rs_interrupt_single(4)...status = 0...IIR = c1...end.
[ the preceding line repeats another 28x, about once every 10 seconds ]
<7>waiting ttyS...(62)
<7>waiting on ttyS interrupted
I've attached a complete log, starting at boot time, as
log_complete.out. I've also attached my updated patch to the Linux
kernel that I used to capture the debugging output, just for
completeness.
Thanks for the guidance. I'm not sure what this output demonstrates,
but I hope it gets us at least one step closer to the cause...
--
Bob Bell <[EMAIL PROTECTED]>
<6>Serial driver version 5.05c (2001-07-08) with MANY_PORTS SHARE_IRQ
SERIAL_PCI enabled
<6>ttyS00 at 0x03f8 (irq = 4) is a 16550A
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1799...lsr = 96 (jiff=1799)...done
In rs_wait_until_sent(3) check=1...jiff=1799...lsr = 96 (jiff=1799)...done
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1799...lsr = 96 (jiff=1799)...done
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1799...lsr = 96 (jiff=1799)...done
In rs_wait_until_sent(3) check=1...jiff=1799...lsr = 96 (jiff=1799)...done
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1802...lsr = 0 (jiff=1802)...lsr = 96
(jiff=1803)...done
In rs_wait_until_sent(3) check=1...jiff=1803...lsr = 96 (jiff=1803)...done
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(4)
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1804...lsr = 0 (jiff=1804)...lsr = 0
(jiff=1805)...lsr = 96 (jiff=1806)...done
In rs_wait_until_sent(3) check=1...jiff=1806...lsr = 96 (jiff=1806)...done
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1806...lsr = 0 (jiff=1806)...lsr = 96
(jiff=1807)...done
In rs_wait_until_sent(3) check=1...jiff=1807...lsr = 96 (jiff=1807)...done
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
In rs_wait_until_sent(6) check=1...jiff=1809...lsr = 96 (jiff=1809)...done
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(0)
done waiting ttyS...(0)
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 61...DR0d:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 20...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 61...DR72:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 61...DR6f:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 61...DR6f:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 61...DR74:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
rs_interrupt_single(4)...status = 60...IIR = c1...end.
rs_interrupt_single(4)...status = 61...DR0d:61...IIR = c1...end.
rs_interrupt_single(4)...status = 60...THRE...IIR = c1...end.
<7>ttyS wait until sent...
<7>waiting ttyS...(1)
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
rs_interrupt_single(4)...status = 0...IIR = c1...end.
<7>waiting ttyS...(62)
<7>waiting on ttyS interrupted
diff -rup --exclude '*SCCS*' --exclude BitKeeper
linux.orig/drivers/char/serial.c linux/drivers/char/serial.c
--- linux.orig/drivers/char/serial.c Wed Mar 9 17:47:18 2005
+++ linux/drivers/char/serial.c Thu Mar 17 12:04:54 2005
@@ -140,10 +140,10 @@ static char *serial_revdate = "2001-07-0
/* Set of debugging defines */
-#undef SERIAL_DEBUG_INTR
+#define SERIAL_DEBUG_INTR
#undef SERIAL_DEBUG_OPEN
#undef SERIAL_DEBUG_FLOW
-#undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
+#define SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
#undef SERIAL_DEBUG_PCI
#undef SERIAL_DEBUG_AUTOCONF
@@ -265,6 +265,10 @@ static int serial_refcount;
static struct timer_list serial_timer;
+extern pid_t watched_pid;
+extern void dbg_addmsg(char *fmt, ...);
+#define printk(...) dbg_addmsg(__VA_ARGS__)
+
/* serial subtype definitions */
#ifndef SERIAL_TYPE_NORMAL
#define SERIAL_TYPE_NORMAL 1
@@ -927,7 +931,7 @@ static void rs_interrupt_single(int irq,
((iir & UART_IIR_ID) == UART_IIR_THRI))
transmit_chars(info, 0);
if (pass_counter++ > RS_ISR_PASS_LIMIT) {
-#if SERIAL_DEBUG_INTR
+#ifdef SERIAL_DEBUG_INTR
printk("rs_single loop break.\n");
#endif
break;
@@ -2942,12 +2946,12 @@ static void rs_wait_until_sent(struct tt
if (!timeout || timeout > 2*info->timeout)
timeout = 2*info->timeout;
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
- printk("jiff=%lu...", jiffies);
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk("In
rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk("jiff=%lu...",
jiffies);
#endif
while (!((lsr = serial_inp(info, UART_LSR)) & UART_LSR_TEMT)) {
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk("lsr = %d
(jiff=%lu)...", lsr, jiffies);
#endif
set_current_state(TASK_INTERRUPTIBLE);
schedule_timeout(char_time);
@@ -2957,7 +2961,7 @@ static void rs_wait_until_sent(struct tt
break;
}
#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
- printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk("lsr = %d
(jiff=%lu)...done\n", lsr, jiffies);
#endif
}
diff -rup --exclude '*SCCS*' --exclude BitKeeper
linux.orig/drivers/char/tty_ioctl.c linux/drivers/char/tty_ioctl.c
--- linux.orig/drivers/char/tty_ioctl.c Wed Mar 9 17:47:18 2005
+++ linux/drivers/char/tty_ioctl.c Thu Mar 17 12:04:56 2005
@@ -25,7 +25,21 @@
#include <asm/uaccess.h>
#include <asm/system.h>
-#undef TTY_DEBUG_WAIT_UNTIL_SENT
+char dbg_msgbuf[1024*256] = { '\0' };
+char *dbg_msgcur = dbg_msgbuf;
+void dbg_addmsg(char *fmt, ...) {
+ va_list args;
+ va_start(args, fmt);
+ dbg_msgcur += vsprintf(dbg_msgcur, fmt, args);
+ va_end(args);
+ if (dbg_msgcur >= (dbg_msgbuf + sizeof(dbg_msgbuf))) {
+ panic("debug message buffer overflow");
+ }
+}
+
+
+#define TTY_DEBUG_WAIT_UNTIL_SENT
+#define printk(...) dbg_addmsg(__VA_ARGS__)
#undef DEBUG
@@ -43,7 +57,7 @@ void tty_wait_until_sent(struct tty_stru
#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
char buf[64];
- printk(KERN_DEBUG "%s wait until sent...\n", tty_name(tty, buf));
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk(KERN_DEBUG "%s wait
until sent...\n", tty_name(tty, buf));
#endif
if (!tty->driver.chars_in_buffer)
return;
@@ -52,16 +66,21 @@ void tty_wait_until_sent(struct tty_stru
timeout = MAX_SCHEDULE_TIMEOUT;
do {
#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
- printk(KERN_DEBUG "waiting %s...(%d)\n", tty_name(tty, buf),
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk(KERN_DEBUG
"waiting %s...(%d)\n", tty_name(tty, buf),
tty->driver.chars_in_buffer(tty));
#endif
set_current_state(TASK_INTERRUPTIBLE);
- if (signal_pending(current))
+ if (signal_pending(current)) {
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY)
printk(KERN_DEBUG "waiting on %s interrupted\n", tty_name(tty, buf));
goto stop_waiting;
+ }
if (!tty->driver.chars_in_buffer(tty))
break;
timeout = schedule_timeout(timeout);
} while (timeout);
+#ifdef TTY_DEBUG_WAIT_UNTIL_SENT
+ if (tty->driver.type != TTY_DRIVER_TYPE_PTY) printk("done waiting
%s...(%d)\n", tty_name(tty, buf), tty->driver.chars_in_buffer(tty));
+#endif
if (tty->driver.wait_until_sent)
tty->driver.wait_until_sent(tty, timeout);
stop_waiting:
