linux-kernel - Re: PROBLEM: kernel oops with g

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Date:	Tue, 23 Jun 2009 00:22:38 -0700
From:	David Brownell <david-b@...bell.net>
To:	Marek Szyprowski <m.szyprowski@...sung.com>
Cc:	"'Alan Stern'" <stern@...land.harvard.edu>,
	"'Peter Korsgaard'" <jacmet@...site.dk>,
	"'USB list'" <linux-usb@...r.kernel.org>,
	"'Kernel development list'" <linux-kernel@...r.kernel.org>,
	kyungmin.park@...sung.com
Subject: Re: PROBLEM: kernel oops with g_serial USB gadget on 2.6.30

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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