This is a note to let you know that I've just added the patch titled media: s5p: fix pm_runtime_get_sync() usage count to the 5.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: media-s5p-fix-pm_runtime_get_sync-usage-count.patch and it can be found in the queue-5.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit b30bb4c7b855b618c1607b1d20ead4383908820f Author: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Date: Fri Apr 23 17:04:23 2021 +0200 media: s5p: fix pm_runtime_get_sync() usage count [ Upstream commit fdc34e82c0f968ac4c157bd3d8c299ebc24c9c63 ] 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 s5p_cec_adap_enable(). Reviewed-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> Reviewed-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx> Acked-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/media/cec/platform/s5p/s5p_cec.c b/drivers/media/cec/platform/s5p/s5p_cec.c index 2a3e7ffefe0a..2250c1cbc64e 100644 --- a/drivers/media/cec/platform/s5p/s5p_cec.c +++ b/drivers/media/cec/platform/s5p/s5p_cec.c @@ -35,10 +35,13 @@ MODULE_PARM_DESC(debug, "debug level (0-2)"); static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable) { + int ret; struct s5p_cec_dev *cec = cec_get_drvdata(adap); if (enable) { - pm_runtime_get_sync(cec->dev); + ret = pm_runtime_resume_and_get(cec->dev); + if (ret < 0) + return ret; s5p_cec_reset(cec);