From: Mauro Carvalho Chehab mchehab+huawei@kernel.org
stable inclusion from stable-5.10.50 commit 8318f7bc0e6560fd3eac35184a7d188be49bc864 bugzilla: 174522 https://gitee.com/openeuler/kernel/issues/I4DNFY
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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[ Upstream commit 6e8b1526db164c9d4b9dacfb9bc48e365d7c4860 ]
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, avoiding a potential PM usage counter leak.
While here, check if the PM runtime error was caught at open time.
Reviewed-by: Jonathan Cameron Jonathan.Cameron@huawei.com Signed-off-by: Mauro Carvalho Chehab mchehab+huawei@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Chen Jun chenjun102@huawei.com Acked-by: Weilong Chen chenweilong@huawei.com Signed-off-by: Chen Jun chenjun102@huawei.com --- drivers/media/platform/sh_vou.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/media/platform/sh_vou.c b/drivers/media/platform/sh_vou.c index b22dc1d72527..7d30e0c9447e 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);