From: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Reference needs to be taken before arming the timer. Luckily, given the
default timer period of 20s, the potential to hit the race is extremely
unlikely.
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Fixes: 9b4d0598ee94 ("drm/i915: Request watchdog infrastructure")
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
Test-with: 20210318162400.2065097-1-tvrtko.ursulin@xxxxxxxxxxxxxxx
---
drivers/gpu/drm/i915/i915_request.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/i915_request.c b/drivers/gpu/drm/i915/i915_request.c
index 9165971c3c47..bec9c3652188 100644
--- a/drivers/gpu/drm/i915/i915_request.c
+++ b/drivers/gpu/drm/i915/i915_request.c
@@ -350,6 +350,8 @@ static void __rq_arm_watchdog(struct i915_request *rq)
if (!ce->watchdog.timeout_us)
return;
+ i915_request_get(rq);
+
hrtimer_init(&wdg->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
wdg->timer.function = __rq_watchdog_expired;
hrtimer_start_range_ns(&wdg->timer,
@@ -357,7 +359,6 @@ static void __rq_arm_watchdog(struct i915_request *rq)
NSEC_PER_USEC),
NSEC_PER_MSEC,
HRTIMER_MODE_REL);
- i915_request_get(rq);
}
static void __rq_cancel_watchdog(struct i915_request *rq)
--
2.27.0
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