[PATCH v3 3/3] drm/panthor: Take reqs_lock in soft_reset for clearing pending_reqs

[Nicolas Frattaroli]

panthor_gpu_soft_reset() sets pending_reqs to 0 without taking the
requisite reqs_lock.

Fix this by taking the lock for the duration of the modification.

Fixes: 5cd894e258c4 ("drm/panthor: Add the GPU logical block")
Signed-off-by: Nicolas Frattaroli <nicolas.frattar...@collabora.com>
---
 drivers/gpu/drm/panthor/panthor_gpu.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panthor/panthor_gpu.c 
b/drivers/gpu/drm/panthor/panthor_gpu.c
index cb5319d1c5de..12e7e29b35b5 100644
--- a/drivers/gpu/drm/panthor/panthor_gpu.c
+++ b/drivers/gpu/drm/panthor/panthor_gpu.c
@@ -405,7 +405,10 @@ int panthor_gpu_soft_reset(struct panthor_device *ptdev)
                return -ETIMEDOUT;
        }
 
-       ptdev->gpu->pending_reqs = 0;
+       scoped_guard(spinlock, &ptdev->gpu->reqs_lock) {
+               ptdev->gpu->pending_reqs = 0;
+       }
+
        return 0;
 }
 

-- 
2.55.0