On Wed, Jan 14, 2004 at 12:20:25PM +0000, [EMAIL PROTECTED] wrote:
Hi, in reference to: http://www.ussg.iu.edu/hypermail/linux/kernel/0303.3/1137.html
I'm having exactly this problem in ftdi_sio on 2.4.20 The attached device is a crystalfontz LCD which echos chars back for each command sent.
Please say there is a 2.4.20 patch available?
Nope.
Damn I need to use 2.4.20 as this is for an embedded system which has been extensively tested and patched.
Having a look at the (extensive) changes between 2.4.20 and 2.4.22 http://lxr.linux.no/diff/drivers/usb/serial/ftdi_sio.c?v=2.4.20;diffval=2.4.22;diffvar=v I'm not sure I can just pop the version from 2.4.22 back to the 2.4.20 kernel, or whether it will even fix the problem?
Try the latest 2.4.23 kernel, it might work better. If not, there's a patch in the Red Hat kernel that should fix this problem.
I looked at the latest redhat 2.4.20 kernel (2.4.20-28.9), which is so different from main line it's not funny (31,831,994 bytes of patches to be precise).
Am I correct in assuming that the patch/bug is not specific to ftdi_sio and applies to usb-serial? I'm infering this from your comment here: http://www.ussg.iu.edu/hypermail/linux/kernel/0303.3/0824.html
However there is a comment in the newer ftdi_sio.c
that says the problem may be specific to it?
* (17/Feb/2003) Bill Ryder
* Added write urb buffer pool on a per device basis
* Added more checking for open file on callbacks (fixed OOPS)
* Added CrystalFontz 632 and 634 PIDs
* (thanx to CrystalFontz for the sample devices - they flushed out
* some driver bugs)
* Minor debugging message changes
* Added throttle, unthrottle and chars_in_buffer functions
* Fixed FTDI_SIO (the original device) bug
* Fixed some shutdown handling
Go dig that out and see.
OK I'll just try throwing in the latest ftdi_sio driver to see if it fixes it (I haven't got hardware at the moment).
Or just use 2.6.1, it doesn't have that problem :)
not an option I'm afraid.
cheers, Pádraig.
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