linux-kernel - Re: Crash in Kernel 2.6.22.1 after calling mmc_register

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Message-ID: <20080108204424.19f4f414@poseidon.drzeus.cx>
Date:	Tue, 8 Jan 2008 20:44:24 +0100
From:	Pierre Ossman <drzeus@...eus.cx>
To:	"raki john" <raki4652@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Crash in Kernel 2.6.22.1 after calling mmc_register_card

On Mon, 7 Jan 2008 15:31:32 -0800
"raki john" <raki4652@...il.com> wrote:

> Hi All,
> 
> Please CC me on responses.
> 
> I am working on a SD/MMC Host driver .
> 
> I am getting kerenl oops after mmc_register_card () is called.
> i working on  LINUX 2.6.22.1 kerenl.
> 
> What might be the reason for this.
> 

That's a rather central place for it to crash, so I'm doubtful it's a bug there. I'd guess some kind of memory corruption (an all to easy mistake to make when writing a new driver). Are you using DMA for the controller? If so, try using PIO and see if it stops oopsing.

Rgds
Pierre

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