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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2016-04-27 11:02:01 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2016-04-28 11:11:44 +0300 |
| commit | bcbdb6d01150dcc1769ddc9baaaf7f102f27f919 (patch) | |
| tree | e0e93c16a85afe9369480626aa079e2a0c11c64f /include/linux | |
| parent | 19ab4ed329393c0674f2b78fb71365a9461ee79b (diff) | |
| download | linux-bcbdb6d01150dcc1769ddc9baaaf7f102f27f919.tar.xz | |
drm/i915: Protect gen7 irq_seqno_barrier with uncore lock
Faced with sporadic machine hangs on gen7, that mimic the issue of
concurrent writes to the same cacheline and seem to start with
commit 9b9ed3093613 (drm/i915: Remove forcewake dance from seqno/irq
barrier on legacy gen6+), let us restore the spinlock around the mmio
read.
Fixes: 9b9ed3093613 (drm/i915: Remove forcewake dance from seqno/irq...)
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461744121-27051-1-git-send-email-chris@chris-wilson.co.uk
Tested-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Diffstat (limited to 'include/linux')
0 files changed, 0 insertions, 0 deletions