Re: [Linux-fbdev-devel] [PATCH] au1200fb: fix oops due to uninitialized fb_info.lock mutex

[Krzysztof H. <krz...@po...>]

On Tue, 07 Jul 2009 10:29:51 +0200
Manuel Lauss <man...@go...> wrote:

> commit 4148df9b0f38bdd362dd91d52076926c11cbe5a9 breaks au1200fb due to
> fb_info.lock now being uninitialized at the time of the
> register_frambuffer call:
> 
> CPU 0 Unable to handle kernel paging request at virtual address 00000000, epc == 8038ccd4, ra == 802412d4
> Call Trace:
> [<8038ccd4>] __mutex_lock_slowpath+0x3c/0xe4
> [<802412d4>] lock_fb_info+0x20/0x50
> [<80242158>] register_framebuffer+0x264/0x2a4
> [<8024f8c4>] au1200fb_drv_probe+0x308/0x444
> [<80273ef8>] driver_probe_device+0xbc/0x184
> [<8027402c>] __driver_attach+0x6c/0xa4
> [<802736bc>] bus_for_each_dev+0x60/0xb0
> [<80272e20>] bus_add_driver+0xc8/0x24c
> [<802743f4>] driver_register+0xdc/0x190
> [<8047d130>] au1200fb_init+0x39c/0x3cc
> [<80100460>] _stext+0x60/0x1c8
> [<8046f334>] kernel_init+0xc8/0x134
> [<80106f64>] kernel_thread_helper+0x10/0x18
> 
> This band-aid fixes this oops.
> 

Please wait a little. Currently, I, Paul Mundt and Linus discuss how to fix all drivers broken by the commit 4148df9b0f38bdd362dd91d52076.

Kind regards,
Krzysztof

 	 
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