linux-kernel - Re: [PATCH] fsl-diu-fb: Pass the proper device for dma mapping routines

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Message-Id: <4A6C5BFC-C079-4D19-A0FC-992DF2DCF6B4@kernel.crashing.org>
Date:	Mon, 6 Apr 2009 09:16:00 -0500
From:	Kumar Gala <galak@...nel.crashing.org>
To:	Anton Vorontsov <avorontsov@...mvista.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Antonino Daplas <adaplas@...il.com>,
	Timur Tabi <timur@...escale.com>, linuxppc-dev@...abs.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] fsl-diu-fb: Pass the proper device for dma mapping routines


On Apr 4, 2009, at 1:31 PM, Anton Vorontsov wrote:

> The driver should pass a device that specifies internal DMA ops, but
> currently NULL pointers are passed, and thus following bug pops up:
>
>  Freescale DIU driver
>  ------------[ cut here ]------------
>  kernel BUG at arch/powerpc/include/asm/dma-mapping.h:237!
>  Oops: Exception in kernel mode, sig: 5 [#1]
>  ...
>  NIP [c01658b4] allocate_buf+0x0/0x8
>  LR [c0306554] fsl_diu_probe+0x2b4/0x518
>  Call Trace:
>  [df02be10] [c030638c] fsl_diu_probe+0xec/0x518 (unreliable)
>  [df02be60] [c020cdec] of_platform_device_probe+0x5c/0x84
>  [df02be80] [c018f5d0] really_probe+0x78/0x1a0
>  [df02bea0] [c018f7c0] __driver_attach+0xa4/0xa8
>  [df02bec0] [c018ea00] bus_for_each_dev+0x60/0x9c
>  [df02bef0] [c018f414] driver_attach+0x24/0x34
>  [df02bf00] [c018f168] bus_add_driver+0x12c/0x1cc
>  [df02bf20] [c018fbdc] driver_register+0x6c/0x110
>  [df02bf30] [c020ccb4] of_register_driver+0x54/0x70
>  [df02bf40] [c03d0a50] fsl_diu_init+0x70/0xa4
>  ...
>
> This patch fixes the issue.
>
> Signed-off-by: Anton Vorontsov <avorontsov@...mvista.com>
> ---
> drivers/video/fsl-diu-fb.c |   34 +++++++++++++++++++++-------------
> 1 files changed, 21 insertions(+), 13 deletions(-)

applied

- k
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