linux-kernel - Re: Fix for fsl

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Message-Id: <4BF2BC2E-1596-42D1-A403-78A1FDBC9EAC@kernel.crashing.org>
Date:	Thu, 27 Oct 2011 13:28:12 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Rusev <arusev@....rtsoft.ru>
Cc:	benh@...nel.crashing.org, paulus@...ba.org,
	Shengzhou.Liu@...escale.com, Shaohui.Xie@...escale.com,
	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: Fix for fsl_upm


On Oct 27, 2011, at 9:18 AM, Rusev wrote:

> patch is vs. 2.6.39, yet it applied to 3.1
> 
> 
> 
> Fix of UPM driver for Freescale PowerPC processors
> 
> If Freescale LBC driver fails to initialise itself from device tree,
> then internal structure is freed only but not NULL-fied.
> As result functions fsl_lbc_find() after checking the structure is not NULL are
> trying to access device registers.
> 
> Signed-off-by: Alexandre Rusev <arusev@....rtsoft.ru> 
> --- linux-2.6.39.old/arch/powerpc/sysdev/fsl_lbc.c	2011-10-27 03:17:28.000000000 +0400
> +++ linux-2.6.39/arch/powerpc/sysdev/fsl_lbc.c	2011-10-27 05:06:44.000000000 +0400
> @@ -322,6 +322,7 @@ static int __devinit fsl_lbc_ctrl_probe(
> err:
> 	iounmap(fsl_lbc_ctrl_dev->regs);
> 	kfree(fsl_lbc_ctrl_dev);
> +	fsl_lbc_ctrl_dev = NULL;
> 	return ret;
> }
> 

Can you send this as a proper patch.

- k

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