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[v3,15/79] media: sh_vou: fix pm_runtime_get_sync() usage count

Message ID 3d2ef55f0ca6f4f58804b402d0d1bf176bcf9791.1619519080.git.mchehab+huawei@kernel.org
State Superseded
Headers show
Series None | expand

Commit Message

Mauro Carvalho Chehab April 27, 2021, 10:26 a.m. UTC 
The pm_runtime_get_sync() internally increments the
dev->power.usage_count without decrementing it, even on errors.
Replace it by the new pm_runtime_resume_and_get(), introduced by:
commit dd8088d5a896 ("PM: runtime: Add pm_runtime_resume_and_get to deal with usage counter")
in order to properly decrement the usage counter and avoid memory
leaks.

While here, check if the PM runtime error was caught at open time.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/platform/sh_vou.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c
index 4ac48441f22c..ca4310e26c49 100644
--- a/drivers/media/platform/sh_vou.c
+++ b/drivers/media/platform/sh_vou.c
@@ -1133,7 +1133,11 @@  static int sh_vou_open(struct file *file)
 	if (v4l2_fh_is_singular_file(file) &&
 	    vou_dev->status == SH_VOU_INITIALISING) {
 		/* First open */
-		pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
+		err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev);
+		if (err < 0) {
+			v4l2_fh_release(file);
+			goto done_open;
+		}
 		err = sh_vou_hw_init(vou_dev);
 		if (err < 0) {
 			pm_runtime_put(vou_dev->v4l2_dev.dev);