I've just had the misfortune of having my NFSROOT system (lots of network interrupts), have its card sharing interrupts with the i810 graphics.. once I run anything 3d the kernel oops..
The attached patch contains the quick fix which is to check in thr irq handler if dev->dev_private is NULL or not before going using it .. also a udelay patch included which I think the DRI tree has but the LK one doesn't....(arrgg too many trees :-)..
I've attached a second patch to xc/xc/programs/Xserver/hw/xfree86/drivers/i810/i810_dri.c that may also fix the problem but which I haven't tested,
What happens is the DMA cleanup occurs which frees the private data, and an interrupt comes in from the network card most likely but the i810 driver is let know as the IRQ hasn't been deregistered yet..
This issue also will affect the i830 and gamma (not that anyone cares) but maybe others as well as my DRI tree is old enough at this stage....
What codebase is this patch against? I was of the opinion that we'd actually eliminated the use of interrupts from the i810 driver.
Keith
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