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From: "Szilveszter Ordog" <slipszi@gmail.com>
To: "Ben Nizette" <bn@niasdigital.com>
Cc: kernel <kernel@avr32linux.org>,
	"Haavard Skinnemoen" <hskinnemoen@atmel.com>,
	linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [BUG, bisected] atmel_spi: hard lockups in transfer
Date: Mon, 7 Apr 2008 02:24:04 +0200	[thread overview]
Message-ID: <ac67d9130804061724v74856a30ta8b128cc5b69cf80@mail.gmail.com> (raw)
In-Reply-To: <1207438118.3319.8.camel@moss.renham>

>  For some weeks now there have been reports flying across the main AVR32
>  support forum, avrfreaks [1], that atmel_spi now hard-hangs on most
>  transfers.  The behaviour is not apparent in .23 and is in .24+.  One
>  tester was good enough to bisect the problem and turned up
>
>  154443c72f47169ebcb3a7befbff0e934c49bff3
>  atmel_spi: chain DMA transfers
>
>  as the culprit.

Thanks for reporting this. Unfortunately it is difficult to test for
me, since I do not have the hardware and there are no error messages.
However, if you add the following line

#define DEBUG

to the top of drivers/spi/atmel_spi.c (before the #include directives)
and recompile the kernel, then you would get lots of debug output
which could help us pinpoint the problem.

Szilveszter

  parent reply	other threads:[~2008-04-07  0:24 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-05 23:28 Ben Nizette
2008-04-06 22:18 ` Haavard Skinnemoen
2008-04-09 12:00   ` Marc Pignat
2008-04-09 21:50     ` Ben Nizette
2008-04-07  0:24 ` Szilveszter Ordog [this message]
2008-04-08  5:33   ` Ben Nizette

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