drm/i915: Replace WARN inside I915_READ64_2x32 with retry loop

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commit ee0a227b7a upstream.

Since we may conceivably encounter situations where the upper part of the
64bit register changes between reads, for example when a timestamp
counter overflows, change the WARN into a retry loop.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

...

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Chris Wilson 2015-07-15 09:50:42 +01:00 • committed by Luis Henriques

parent 8e5ad4f542

commit a38baaade4

1 changed files with 8 additions and 9 deletions

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drivers/gpu/drm/i915/i915_drv.h

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