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From: David Brownell <david-b@pacbell.net>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: PROBLEM: kernel oops with g_serial USB gadget on 2.6.30
Date: Tue, 23 Jun 2009 00:22:38 -0700
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Cc: "'Alan Stern'" <stern@rowland.harvard.edu>,
       "'Peter Korsgaard'" <jacmet@sunsite.dk>,
       "'USB list'" <linux-usb@vger.kernel.org>,
       "'Kernel development list'" <linux-kernel@vger.kernel.org>,
       kyungmin.park@samsung.com
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On Monday 22 June 2009, Marek Szyprowski wrote:
> 
> > Like, oh, changing a spinlock to a mutex. ? You might change the
> > low_latency setting and review how that's now supposed to behave.
> 
> In in gs_open() function in drivers/usb/gadget/u_serial.c, after the 
> line 780 I've added:
> 
> tty->low_latency = 1;

That's already how it's set.  Try instead *REMOVING* the line
which sets that flag.


> This helped a bit, but after a few serial transfers I got the same 
> bug again.

Of course.  You didn't change anything.


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