[PATCH] drm/panfrost: Don't corrupt the queue mutex on open/close

[Steven Price]

The mutex within the panfrost_queue_state should have the lifetime of
the queue, however it was erroneously initialised/destroyed during
panfrost_job_{open,close} which is called every time a client
opens/closes the drm node.

Move the initialisation/destruction to panfrost_job_{init,fini} where it
belongs.

Fixes: 1a11a88cfd9a ("drm/panfrost: Fix job timeout handling")
Signed-off-by: Steven Price <steven.pr...@arm.com>
Reviewed-by: Boris Brezillon <boris.brezil...@collabora.com>
---
 drivers/gpu/drm/panfrost/panfrost_job.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c 
b/drivers/gpu/drm/panfrost/panfrost_job.c
index cfb431624eea..145ad37eda6a 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -595,6 +595,8 @@ int panfrost_job_init(struct panfrost_device *pfdev)
        }
 
        for (j = 0; j < NUM_JOB_SLOTS; j++) {
+               mutex_init(&js->queue[j].lock);
+
                js->queue[j].fence_context = dma_fence_context_alloc(1);
 
                ret = drm_sched_init(&js->queue[j].sched,
@@ -625,8 +627,10 @@ void panfrost_job_fini(struct panfrost_device *pfdev)
 
        job_write(pfdev, JOB_INT_MASK, 0);
 
-       for (j = 0; j < NUM_JOB_SLOTS; j++)
+       for (j = 0; j < NUM_JOB_SLOTS; j++) {
                drm_sched_fini(&js->queue[j].sched);
+               mutex_destroy(&js->queue[j].lock);
+       }
 
 }
 
@@ -638,7 +642,6 @@ int panfrost_job_open(struct panfrost_file_priv 
*panfrost_priv)
        int ret, i;
 
        for (i = 0; i < NUM_JOB_SLOTS; i++) {
-               mutex_init(&js->queue[i].lock);
                sched = &js->queue[i].sched;
                ret = drm_sched_entity_init(&panfrost_priv->sched_entity[i],
                                            DRM_SCHED_PRIORITY_NORMAL, &sched,
@@ -657,7 +660,6 @@ void panfrost_job_close(struct panfrost_file_priv 
*panfrost_priv)
 
        for (i = 0; i < NUM_JOB_SLOTS; i++) {
                drm_sched_entity_destroy(&panfrost_priv->sched_entity[i]);
-               mutex_destroy(&js->queue[i].lock);
                /* Ensure any timeouts relating to this client have completed */
                flush_delayed_work(&js->queue[i].sched.work_tdr);
        }
-- 
2.20.1

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