Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=a5569a565f7315fe7241cf963f2cc74e53871e11
Commit:     a5569a565f7315fe7241cf963f2cc74e53871e11
Parent:     1fc3858a6358400195c067f8726cf3c86a180d80
Author:     Alan Cox <[EMAIL PROTECTED]>
AuthorDate: Mon Jan 21 17:18:24 2008 -0800
Committer:  Linus Torvalds <[EMAIL PROTECTED]>
CommitDate: Mon Jan 21 19:39:41 2008 -0800

    keyspan: fix oops
    
    If we get a data URB back from the hardware after we have put the tty to
    bed we go kaboom.  Fortunately all we need to do is process the URB without
    trying to ram its contents down the throat of an ex-tty.
    
    Signed-off-by: Alan Cox <[EMAIL PROTECTED]>
    Cc: Greg KH <[EMAIL PROTECTED]>
    Signed-off-by: Andrew Morton <[EMAIL PROTECTED]>
    Signed-off-by: Linus Torvalds <[EMAIL PROTECTED]@linux-foundation.org>
---
 drivers/usb/serial/keyspan.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/usb/serial/keyspan.c b/drivers/usb/serial/keyspan.c
index feba967..7c069a0 100644
--- a/drivers/usb/serial/keyspan.c
+++ b/drivers/usb/serial/keyspan.c
@@ -447,7 +447,7 @@ static void usa26_indat_callback(struct urb *urb)
 
        port = (struct usb_serial_port *) urb->context;
        tty = port->tty;
-       if (urb->actual_length) {
+       if (tty && urb->actual_length) {
                /* 0x80 bit is error flag */
                if ((data[0] & 0x80) == 0) {
                        /* no errors on individual bytes, only possible overrun 
err*/
-
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