diff mbox series

[5.12,124/700] media: mdk-mdp: fix pm_runtime_get_sync() usage count

Message ID 20210712060942.513070398@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman July 12, 2021, 6:03 a.m. UTC 
From: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

[ Upstream commit d07bb9702cf5f5ccf3fb661e6cab54bbc33cd23f ]

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, fix the return contition of mtk_mdp_m2m_start_streaming(),
as it doesn't make any sense to return 0 if the PM runtime failed
to resume.

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>
---
 drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
index ace4528cdc5e..f14779e7596e 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
@@ -391,12 +391,12 @@  static int mtk_mdp_m2m_start_streaming(struct vb2_queue *q, unsigned int count)
 	struct mtk_mdp_ctx *ctx = q->drv_priv;
 	int ret;
 
-	ret = pm_runtime_get_sync(&ctx->mdp_dev->pdev->dev);
+	ret = pm_runtime_resume_and_get(&ctx->mdp_dev->pdev->dev);
 	if (ret < 0)
-		mtk_mdp_dbg(1, "[%d] pm_runtime_get_sync failed:%d",
+		mtk_mdp_dbg(1, "[%d] pm_runtime_resume_and_get failed:%d",
 			    ctx->id, ret);
 
-	return 0;
+	return ret;
 }
 
 static void *mtk_mdp_m2m_buf_remove(struct mtk_mdp_ctx *ctx,