Re: [linux-usb-devel] Re: [BUG] usblp_write spins forever after an error

[Paulo Marques]

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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