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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-08-21 17:23:36 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-08-21 19:32:27 +0300 |
| commit | a20ab592d1a87218229109d109b8e2feae6f598d (patch) | |
| tree | cdfae217ce0cae56dfa552ecbc849f2d6e003d48 /drivers/gpu/drm/i915/gt | |
| parent | 6846895fde05558a39ffcee7631a802a923d9b16 (diff) | |
| download | linux-a20ab592d1a87218229109d109b8e2feae6f598d.tar.xz | |
drm/i915/execlists: Set priority hint prior to submission
Since we now run process_csb() outside of the engine->active.lock, we
can process a CS-event immediately upon our ELSP write. As we currently
inspect the pending queue *after* the ELSP write, there is an
opportunity for a CS-event to update the pending queue before we can
read it, making ourselves chases an invalid pointer.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=111427
Fixes: df403069029d ("drm/i915/execlists: Lift process_csb() out of the irq-off spinlock")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190821142336.21609-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu/drm/i915/gt')
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_lrc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_lrc.c b/drivers/gpu/drm/i915/gt/intel_lrc.c index 44780e7fafec..d42584439f51 100644 --- a/drivers/gpu/drm/i915/gt/intel_lrc.c +++ b/drivers/gpu/drm/i915/gt/intel_lrc.c @@ -1335,9 +1335,9 @@ done: if (submit) { *port = execlists_schedule_in(last, port - execlists->pending); memset(port + 1, 0, (last_port - port) * sizeof(*port)); - execlists_submit_ports(engine); execlists->switch_priority_hint = switch_prio(engine, *execlists->pending); + execlists_submit_ports(engine); } else { ring_set_paused(engine, 0); } |