Patch "drm/i915: Hold RPM wakelock while initializing OA buffer" has been added to the 4.12-stable tree

Patch "drm/i915: Hold RPM wakelock while initializing OA buffer" has been added to the 4.12-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/i915: Hold RPM wakelock while initializing OA buffer

to the 4.12-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-hold-rpm-wakelock-while-initializing-oa-buffer.patch
and it can be found in the queue-4.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 04941829b0049d2446c7042ab9686dd057d809a6 Mon Sep 17 00:00:00 2001
From: "sagar.a.kamble@intel.com" <sagar.a.kamble@intel.com>
Date: Tue, 27 Jun 2017 23:09:41 +0530
Subject: drm/i915: Hold RPM wakelock while initializing OA buffer

From: sagar.a.kamble@intel.com <sagar.a.kamble@intel.com>

commit 04941829b0049d2446c7042ab9686dd057d809a6 upstream.

OA buffer initialization involves access to HW registers to set
the OA base, head and tail. Ensure device is awake while setting
these. With this, all oa.ops are covered under RPM and forcewake
wakelock.

Cc: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1498585181-23048-1-git-send-email-sagar.a.kamble@intel.com
Fixes: d79651522e89c ("drm/i915: Enable i915 perf stream for Haswell OA unit")
(cherry picked from commit 987f8c444aa2c33d98e7030d0c5f0a5325cc84ea)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/i915/i915_perf.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/i915/i915_perf.c
+++ b/drivers/gpu/drm/i915/i915_perf.c
@@ -1210,10 +1210,6 @@ static int i915_oa_stream_init(struct i9
 			return ret;
 	}
 
-	ret = alloc_oa_buffer(dev_priv);
-	if (ret)
-		goto err_oa_buf_alloc;
-
 	/* PRM - observability performance counters:
 	 *
 	 *   OACONTROL, performance counter enable, note:
@@ -1229,6 +1225,10 @@ static int i915_oa_stream_init(struct i9
 	intel_runtime_pm_get(dev_priv);
 	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
 
+	ret = alloc_oa_buffer(dev_priv);
+	if (ret)
+		goto err_oa_buf_alloc;
+
 	ret = dev_priv->perf.oa.ops.enable_metric_set(dev_priv);
 	if (ret)
 		goto err_enable;
@@ -1240,11 +1240,11 @@ static int i915_oa_stream_init(struct i9
 	return 0;
 
 err_enable:
-	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
-	intel_runtime_pm_put(dev_priv);
 	free_oa_buffer(dev_priv);
 
 err_oa_buf_alloc:
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+	intel_runtime_pm_put(dev_priv);
 	if (stream->ctx)
 		oa_put_render_ctx_id(stream);
 


Patches currently in stable-queue which might be from sagar.a.kamble@intel.com are

queue-4.12/drm-i915-hold-rpm-wakelock-while-initializing-oa-buffer.patch