Merge remote branch 'intel/drm-intel-next' of /ssd/git/drm-next into drm-core-next

* 'intel/drm-intel-next' of /ssd/git/drm-next: (771 commits)
  drm/i915: Undo "Uncouple render/power ctx before suspending"
  drm/i915: Allow the application to choose the constant addressing mode
  drm/i915: dynamic render p-state support for Sandy Bridge
  drm/i915: Enable EI mode for RCx decision making on Sandybridge
  drm/i915/sdvo: Border and stall select became test bits in gen5
  drm/i915: Add Guess-o-matic for pageflip timestamping.
  drm/i915: Add support for precise vblank timestamping (v2)
  drm/i915: Add frame buffer compression on Sandybridge
  drm/i915: Add self-refresh support on Sandybridge
  drm/i915: Wait for vblank before unpinning old fb
  Revert "drm/i915: Avoid using PIPE_CONTROL on Ironlake"
  drm/i915: Pass clock limits down to PLL matcher
  drm/i915: Poll for seqno completion if IRQ is disabled
  drm/i915/ringbuffer: Make IRQ refcnting atomic
  agp/intel: Fix missed cached memory flags setting in i965_write_entry()
  drm/i915/sdvo: Only use the SDVO pin if it is in the valid range
  drm/i915: Enable RC6 autodownclocking on Sandybridge
  drm/i915: Terminate the FORCE WAKE after we have finished reading
  drm/i915/gtt: Clear the cachelines upon resume
  drm/i915: Restore GTT mapping first upon resume
  ...

1 files changed, 7 insertions, 0 deletions

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e354c33df082..c1faded5fca0 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1047,8 +1047,14 @@ out:
 
                 if ((file->f_flags & O_DSYNC) || IS_SYNC(inode)) {
                         trans = btrfs_start_transaction(root, 0);
+                        if (IS_ERR(trans)) {
+                                num_written = PTR_ERR(trans);
+                                goto done;
+                        }
+                        mutex_lock(&inode->i_mutex);
                         ret = btrfs_log_dentry_safe(trans, root,
                                                     file->f_dentry);
+                        mutex_unlock(&inode->i_mutex);
                         if (ret == 0) {
                                 ret = btrfs_sync_log(trans, root);
                                 if (ret == 0)
@@ -1067,6 +1073,7 @@ out:
                              (start_pos + num_written - 1) >> PAGE_CACHE_SHIFT);
                 }
         }
+done:
         current->backing_dev_info = NULL;
         return num_written ? num_written : err;
 }