drm/amdkfd: Locking PM mutex while allocating IB buffer

Signed-off-by: Ben Goz <ben.goz@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c
index 91f0350b6180..c317feb43f69 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c
@@ -94,12 +94,14 @@ static int pm_allocate_runlist_ib(struct packet_manager *pm,
 
         pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription);
 
+        mutex_lock(&pm->lock);
+
         retval = kfd_gtt_sa_allocate(pm->dqm->dev, *rl_buffer_size,
                                         &pm->ib_buffer_obj);
 
         if (retval) {
                 pr_err("Failed to allocate runlist IB\n");
-                return retval;
+                goto out;
         }
 
         *(void **)rl_buffer = pm->ib_buffer_obj->cpu_ptr;
@@ -107,6 +109,9 @@ static int pm_allocate_runlist_ib(struct packet_manager *pm,
 
         memset(*rl_buffer, 0, *rl_buffer_size);
         pm->allocated = true;
+
+out:
+        mutex_unlock(&pm->lock);
         return retval;
 }