lkml.org 
[lkml]   [2010]   [Jul]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
DateTue, 27 Jul 2010 17:25:11 +0100
FromRussell King - ARM Linux <>
SubjectRe: [PATCH] [resend] cyber2000fb: fix machine hang on module load
On Tue, Jul 27, 2010 at 03:29:20PM +0200, Ondrej Zary wrote:
> Hello,
> I was testing two CyberPro 2000 based PCI cards on x86 and the machine always
> hanged completely when the cyber2000fb module was loaded. It seems that the
> card hangs when some registers are accessed too quickly after writing RAMDAC
> control register. With this patch, both card work.
>
> Add delay after RAMDAC control register write to prevent hangs on module load.

This one on the other hand I think is rather too heavy.

What might be better is to re-code the last register write to use
the x86 outb_p() stuff to slow it down, rather than using udelay().
Could you try something along those lines please?


\
 
 \ /
  Last update: 2010-07-27 18:27    [from the cache]
©2003-2010