Re: [linux-usb-devel] Re: [BUG] usblp_write spins forever after an error
From: Paulo Marques
Date: Fri Mar 05 2004 - 09:33:17 EST
David Woodhouse wrote:
On Thu, 2004-03-04 at 12:33 +0000, Paulo Marques wrote:
Yes, unfortunately it did went into 2.6.4-rc1. However it is already corrected
in 2.6.4-rc2. Luckily it didn't went into any "non-rc" official release.
Please try 2.6.4-rc2, and check to see if the bug went away...
Seems to work; thanks. Does this need backporting to 2.4 too?
Unfortunately this isn't over yet.
I got suspicious about this bug fix, because I *did* test my patch before
submitting it and the kernel that didn't work before, worked fine with my patch.
But now it seems that it is the other way around. After a few digging I found
out the problem:
The application that I was testing with uses the usblp handle with non-blocking
I/O .
So my patch does work for non-blocking I/O uses of the port, but wrecks the
normal blocking mode.
I've already produced a version that works for both cases. I'll just clean it up
a bit and submit it to 2.4 and 2.6 kernels.
--
Paulo Marques - www.grupopie.com
"In a world without walls and fences who needs windows and gates?"
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