Messages in this thread |  | | | Date | Tue, 27 Jul 2010 17:25:11 +0100 | | From | Russell King - ARM Linux <> | | Subject | Re: [PATCH] [resend] cyber2000fb: fix machine hang on module load |
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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?
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