diff options
| author | Shuicheng Lin <shuicheng.lin@intel.com> | 2025-11-10 18:45:23 +0000 |
|---|---|---|
| committer | Lucas De Marchi <lucas.demarchi@intel.com> | 2025-11-25 11:53:23 -0800 |
| commit | 76555b1eb278da420b6e4d26714319a7a4460e7b (patch) | |
| tree | c14de80ea46720befa73e384313942dee0f1d989 | |
| parent | ac3fd01e4c1efce8f2c054cdeb2ddd2fc0fb150d (diff) | |
drm/xe/guc: Fix resource leak in xe_guc_ct_init_noalloc()
xe_guc_ct_init_noalloc() allocates the CT workqueue and other helpers
before it tries to initialize ct->lock. If drmm_mutex_init() fails
we currently bail out without releasing those resources because the
guc_ct_fini() hasn’t been registered yet.
Since destroy_workqueue() in guc_ct_fini() may flush the workqueue, which
in turn can take the ct lock, the initialization sequence is restructured
to first initialize the ct->lock, then set up all CT state, and finally
register guc_ct_fini().
v2: guc_ct_fini() does take ct lock. (Matt)
v3: move primelockdep() together with drmm_mutex_init(). (Lucas)
Fixes: dd08ebf6c352 ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: Shuicheng Lin <shuicheng.lin@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patch.msgid.link/20251110184522.1581001-2-shuicheng.lin@intel.com
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
(cherry picked from commit 2e4ad5b0667244f496783c58de0995b9562d3344)
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
| -rw-r--r-- | drivers/gpu/drm/xe/xe_guc_ct.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c index 283d846c3512..7b008afb2a8f 100644 --- a/drivers/gpu/drm/xe/xe_guc_ct.c +++ b/drivers/gpu/drm/xe/xe_guc_ct.c @@ -226,6 +226,12 @@ int xe_guc_ct_init_noalloc(struct xe_guc_ct *ct) xe_gt_assert(gt, !(guc_ct_size() % PAGE_SIZE)); + err = drmm_mutex_init(&xe->drm, &ct->lock); + if (err) + return err; + + primelockdep(ct); + ct->g2h_wq = alloc_ordered_workqueue("xe-g2h-wq", WQ_MEM_RECLAIM); if (!ct->g2h_wq) return -ENOMEM; @@ -241,12 +247,6 @@ int xe_guc_ct_init_noalloc(struct xe_guc_ct *ct) init_waitqueue_head(&ct->wq); init_waitqueue_head(&ct->g2h_fence_wq); - err = drmm_mutex_init(&xe->drm, &ct->lock); - if (err) - return err; - - primelockdep(ct); - err = drmm_add_action_or_reset(&xe->drm, guc_ct_fini, ct); if (err) return err; |