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drm/amdkfd: fix a dereference of pdd before it is null checked

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Currently pointer pdd is being dereferenced when assigning pointer
dpm and then pdd is being null checked.  Fix this by checking if
pdd is null before the dereference of pdd occurs.

Addresses-Coverity: ("Dereference before null check")
Fixes: 32cb59f313 ("drm/amdkfd: Track SDMA utilization per process")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Colin Ian King
2020-05-28 23:24:53 +01:00
committed by Alex Deucher
parent 48b270bb22
commit 2652bda7b4
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/amd/amdkfd/kfd_process.c
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@@ -103,10 +103,11 @@ static void kfd_sdma_activity_worker(struct work_struct *work)
return;
pdd = workarea->pdd;
if (!pdd)
return;
dqm = pdd->dev->dqm;
qpd = &pdd->qpd;
if (!pdd || !dqm || !qpd)
if (!dqm || !qpd)
return;
mm = get_task_mm(pdd->process->lead_thread);