[mpeg2] Re: crash on rmmod

[Alexander Pipelka <pipelka@bms-austria.com>]

Rob Morris wrote:

> Hi Alexander,
>
> We ran into the exact same problem when removing the kfir module.
>
> The symptoms were:
>
> 1. you could capture 1 good mpeg2 after a reboot, thereinafter no 
> mpeg2 could be displayed with an mpeg2 player (but we could still get 
> a datastream).
>
> 2. Long delay after you hit Ctrl-C with the 'cat /dev/video0 > 
> test.mpg' (3-4 seconds)
>
> 2. kernel crashes when you remove kfir module
>
>  
>
> The problem appears to be a bug in the kfir module in kfir.c at line 2631.
>
>  
>
> The function is:
>
>  
>
> static void kfir_remove_device(struct kfir_dev *kfir)
>
> the troublesome lines of code are
>
>
>                val=rplxl(DMA0_DONE_ENABLE);
>                val&=~DMA0_DONE_ENABLE;
>                wplxl(DMA0_DONE_ENABLE, val);
>
>  
>
> change these to
>                 
>
>                val=rplxl(PLX9054_DMA0_MODE );
>                val&=~DMA0_DONE_ENABLE;
>                wplxl(PLX9054_DMA0_MODE , val);
>
>  
>
> Quite frankly, I can't see how the current code could have ever worked!
>
> Hope this fixes your problem.
>
Hi Rob!

Thanks for your suggestions.
In the meantime i changed the mainboard from the K7M to a K7VZA with a 
VIA chipset and everything works fine now.

But i will try it with the old mb again and report!


Thanks

Alex