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drm/i915/gen9: Fix PCODE polling timeout in stable backport

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The backport of
2c7d0602c - "Fix PCODE polling during CDCLK change notification"
to the 4.9 stable tree used an incorrect timeout value. Fix this up
so the backport matches the upstream commit.

Reported-by: Thomas Backlund <tmb@mageia.org>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Imre Deak 2017-01-16 18:59:46 +02:00 committed by Greg Kroah-Hartman
parent 9297e0c189
commit 6d15a83af9
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/intel_pm.c
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@ -8015,14 +8015,14 @@ int skl_pcode_request(struct drm_i915_private *dev_priv, u32 mbox, u32 request,
* worst case) _and_ PCODE was busy for some reason even after a
* (queued) request and @timeout_base_ms delay. As a workaround retry
* the poll with preemption disabled to maximize the number of
* requests. Increase the timeout from @timeout_base_ms to 50ms to
* requests. Increase the timeout from @timeout_base_ms to 10ms to
* account for interrupts that could reduce the number of these
* requests.
*/
DRM_DEBUG_KMS("PCODE timeout, retrying with preemption disabled\n");
WARN_ON_ONCE(timeout_base_ms > 3);
preempt_disable();
ret = wait_for_atomic(COND, 50);
ret = wait_for_atomic(COND, 10);
preempt_enable();
out: