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drm/i915: get runtime PM reference around GEM set_caching IOCTL 

After Damien's D3 fix I started to get runtime suspend residency for the
first time and that revealed a breakage on the set_caching IOCTL path
that accesses the HW but doesn't take an RPM ref. Fix this up.

Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Cc: stable@vger.kernel.org
Link: http://patchwork.freedesktop.org/patch/msgid/1446665132-22491-1-git-send-email-imre.deak@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Imre Deak 2015-11-04 21:25:32 +02:00 committed by Jani Nikula
parent 500a3d2eb3
commit fd0fe6acf1
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/i915/i915_gem.c
View File

@ -3809,6 +3809,7 @@ int i915_gem_get_caching_ioctl(struct drm_device *dev, void *data,
int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
struct drm_file *file)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_caching *args = data;
struct drm_i915_gem_object *obj;
enum i915_cache_level level;
@ -3837,9 +3838,11 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
intel_runtime_pm_get(dev_priv);
ret = i915_mutex_lock_interruptible(dev);
if (ret)
return ret;
goto rpm_put;
obj = to_intel_bo(drm_gem_object_lookup(dev, file, args->handle));
if (&obj->base == NULL) {
@ -3852,6 +3855,9 @@ int i915_gem_set_caching_ioctl(struct drm_device *dev, void *data,
drm_gem_object_unreference(&obj->base);
unlock:
mutex_unlock(&dev->struct_mutex);
rpm_put:
intel_runtime_pm_put(dev_priv);
return ret;
}