From: Mauro Carvalho Chehab mchehab+huawei@kernel.org
stable inclusion from stable-5.10.50 commit 3c90c3fbdc960663a4367f12793924391f6a35fd 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 908711f542c17fe61e5d653da1beb8e5ab5c7b50 ]
Currently, the driver just assumes that PM runtime logic succeded resuming the device.
That may not be the case, as pm_runtime_get_sync() can fail (but keeping the usage count incremented).
Replace the code to use pm_runtime_resume_and_get(), and letting it return the error code.
This way, if mtk_vcodec_dec_pw_on() fails, the logic under fops_vcodec_open() will do the right thing and return an error, instead of just assuming that the device is ready to be used.
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/mtk-vcodec/mtk_vcodec_dec_drv.c | 4 +++- drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c | 8 +++++--- drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h | 2 +- 3 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c index 145686d2c219..f59ef8c8c9db 100644 --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c @@ -126,7 +126,9 @@ static int fops_vcodec_open(struct file *file) mtk_vcodec_dec_set_default_params(ctx);
if (v4l2_fh_is_singular(&ctx->fh)) { - mtk_vcodec_dec_pw_on(&dev->pm); + ret = mtk_vcodec_dec_pw_on(&dev->pm); + if (ret < 0) + goto err_load_fw; /* * Does nothing if firmware was already loaded. */ diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c index ddee7046ce42..6038db96f71c 100644 --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c @@ -88,13 +88,15 @@ void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev) put_device(dev->pm.larbvdec); }
-void mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm) +int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm) { int ret;
- ret = pm_runtime_get_sync(pm->dev); + ret = pm_runtime_resume_and_get(pm->dev); if (ret) - mtk_v4l2_err("pm_runtime_get_sync fail %d", ret); + mtk_v4l2_err("pm_runtime_resume_and_get fail %d", ret); + + return ret; }
void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm) diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h index 872d8bf8cfaf..280aeaefdb65 100644 --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.h @@ -12,7 +12,7 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *dev); void mtk_vcodec_release_dec_pm(struct mtk_vcodec_dev *dev);
-void mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm); +int mtk_vcodec_dec_pw_on(struct mtk_vcodec_pm *pm); void mtk_vcodec_dec_pw_off(struct mtk_vcodec_pm *pm); void mtk_vcodec_dec_clock_on(struct mtk_vcodec_pm *pm); void mtk_vcodec_dec_clock_off(struct mtk_vcodec_pm *pm);