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drm/i915: kill set_need_resched

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This is just a remnant from the old days when our reset handling was
horribly racy, suffered from terribly locking issues and often happily
live-locked. Those days are now gone so we can drop the hacks and just
rip the reschedule-point out.

Reported-by: Peter Zijlstra <peterz@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Daniel Vetter 2013-09-12 17:57:28 +02:00
parent 0d971748d0
commit 571c608d06
1 changed files with 4 additions and 7 deletions
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11
drivers/gpu/drm/i915/i915_gem.c
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@ -1390,14 +1390,11 @@ int i915_gem_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
if (i915_terminally_wedged(&dev_priv->gpu_error))
return VM_FAULT_SIGBUS;
case -EAGAIN:
/* Give the error handler a chance to run and move the
* objects off the GPU active list. Next time we service the
* fault, we should be able to transition the page into the
* GTT without touching the GPU (and so avoid further
* EIO/EGAIN). If the GPU is wedged, then there is no issue
* with coherency, just lost writes.
/*
* EAGAIN means the gpu is hung and we'll wait for the error
* handler to reset everything when re-faulting in
* i915_mutex_lock_interruptible.
*/
set_need_resched();
case 0:
case -ERESTARTSYS:
case -EINTR: