drm/xe: Fix xe_pm_runtime_get_if_active return

Current callers of this function are already taking the result
to a boolean and using in an if. It might be a problem because
current function might return negative error codes on failure,
without increasing the reference counter.

In this scenario we could end up with extra 'put' call ending
in unbalanced scenarios.

Let's fix it, while aligning with the current xe_pm_get_if_in_use
style.

Tested-by: Francois Dugast <francois.dugast@intel.com>
Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240522170105.327472-1-rodrigo.vivi@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/xe/xe_pm.c b/drivers/gpu/drm/xe/xe_pm.c
index c1831106ea4b7e91aa79bd85b3e0e28565fc7bfd..d14741f35cc46f341b90eed661542cb07e7f27ab 100644 (file)
--- a/drivers/gpu/drm/xe/xe_pm.c
+++ b/drivers/gpu/drm/xe/xe_pm.c
@@ -505,12 +505,12 @@ int xe_pm_runtime_get_ioctl(struct xe_device *xe)
  * xe_pm_runtime_get_if_active - Get a runtime_pm reference if device active
  * @xe: xe device instance
  *
- * Returns: Any number greater than or equal to 0 for success, negative error
- * code otherwise.
+ * Return: True if device is awake (regardless the previous number of references)
+ * and a new reference was taken, false otherwise.
  */
-int xe_pm_runtime_get_if_active(struct xe_device *xe)
+bool xe_pm_runtime_get_if_active(struct xe_device *xe)
 {
-       return pm_runtime_get_if_active(xe->drm.dev);
+       return pm_runtime_get_if_active(xe->drm.dev) > 0;
 }
 
 /**

diff --git a/drivers/gpu/drm/xe/xe_pm.h b/drivers/gpu/drm/xe/xe_pm.h
index 18b0613fe57b98255f13bd9027657cbad1fabaf2..f694005db2782db107ec9fc36adb5f67e73c937d 100644 (file)
--- a/drivers/gpu/drm/xe/xe_pm.h
+++ b/drivers/gpu/drm/xe/xe_pm.h
@@ -29,7 +29,7 @@ int xe_pm_runtime_resume(struct xe_device *xe);
 void xe_pm_runtime_get(struct xe_device *xe);
 int xe_pm_runtime_get_ioctl(struct xe_device *xe);
 void xe_pm_runtime_put(struct xe_device *xe);
-int xe_pm_runtime_get_if_active(struct xe_device *xe);
+bool xe_pm_runtime_get_if_active(struct xe_device *xe);
 bool xe_pm_runtime_get_if_in_use(struct xe_device *xe);
 void xe_pm_runtime_get_noresume(struct xe_device *xe);
 bool xe_pm_runtime_resume_and_get(struct xe_device *xe);