diff mbox series

[v4,06/61] drm/i915: Add gem object locking to madvise.

Message ID 20201016104444.1492028-7-maarten.lankhorst@linux.intel.com
State New, archived
Headers show
Series drm/i915: Remove obj->mm.lock! | expand

Commit Message

Maarten Lankhorst Oct. 16, 2020, 10:43 a.m. UTC
Doesn't need the full ww lock, only checking if pages are bound.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
---
 drivers/gpu/drm/i915/i915_gem.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

Comments

Thomas Hellström Oct. 30, 2020, 8:26 a.m. UTC | #1
On 10/16/20 12:43 PM, Maarten Lankhorst wrote:
> Doesn't need the full ww lock, only checking if pages are bound.
>
> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index bb0c12975f38..30af7e4b71ab 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -1071,10 +1071,14 @@  i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
 	if (!obj)
 		return -ENOENT;
 
-	err = mutex_lock_interruptible(&obj->mm.lock);
+	err = i915_gem_object_lock_interruptible(obj, NULL);
 	if (err)
 		goto out;
 
+	err = mutex_lock_interruptible(&obj->mm.lock);
+	if (err)
+		goto out_ww;
+
 	if (i915_gem_object_has_pages(obj) &&
 	    i915_gem_object_is_tiled(obj) &&
 	    i915->quirks & QUIRK_PIN_SWIZZLED_PAGES) {
@@ -1119,6 +1123,8 @@  i915_gem_madvise_ioctl(struct drm_device *dev, void *data,
 	args->retained = obj->mm.madv != __I915_MADV_PURGED;
 	mutex_unlock(&obj->mm.lock);
 
+out_ww:
+	i915_gem_object_unlock(obj);
 out:
 	i915_gem_object_put(obj);
 	return err;