This is a note to let you know that I've just added the patch titled
drm/i915/gen9: Fix PCODE polling timeout in stable backport
to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-gen9-fix-pcode-polling-timeout-in-stable-backport.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From imre.deak@xxxxxxxxx Tue Jan 17 16:22:12 2017
From: Imre Deak <imre.deak@xxxxxxxxx>
Date: Mon, 16 Jan 2017 18:59:46 +0200
Subject: drm/i915/gen9: Fix PCODE polling timeout in stable backport
To: Thomas Backlund <tmb@xxxxxxxxxx>
Cc: gregkh@xxxxxxxxxxxxxxxxxxx, arthur.j.runyan@xxxxxxxxx, chris@xxxxxxxxxxxxxxxxxx, jani.nikula@xxxxxxxxx, stable@xxxxxxxxxxxxxxx, ville.syrjala@xxxxxxxxxxxxxxx, stable-commits@xxxxxxxxxxxxxxx
Message-ID: <20170116165946.GB4514@xxxxxxxxxxxxxxxxxxxxxxx>
Content-Disposition: inline
From: Imre Deak <imre.deak@xxxxxxxxx>
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@xxxxxxxxxx>
Signed-off-by: Imre Deak <imre.deak@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_pm.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8015,14 +8015,14 @@ int skl_pcode_request(struct drm_i915_pr
* 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:
Patches currently in stable-queue which might be from imre.deak@xxxxxxxxx are
queue-4.9/drm-i915-gen9-fix-pcode-polling-during-sagv-disabling.patch
queue-4.9/drm-i915-gen9-fix-pcode-polling-timeout-in-stable-backport.patch
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