diff mbox series

[v3,10/79] media: rcar_fdp1: fix pm_runtime_get_sync() usage count

Message ID 9a79a72f93981227f21cd8fa8fc8c2d26eeb4d7b.1619519080.git.mchehab+huawei@kernel.org
State New
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.

Also, right now, the driver is ignoring any troubles when
trying to do PM resume. So, add the proper error handling
for the code.

Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
---
 drivers/media/platform/rcar_fdp1.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/media/platform/rcar_fdp1.c b/drivers/media/platform/rcar_fdp1.c
index 01c1fbb97bf6..c32d237af618 100644
--- a/drivers/media/platform/rcar_fdp1.c
+++ b/drivers/media/platform/rcar_fdp1.c
@@ -2140,7 +2140,13 @@  static int fdp1_open(struct file *file)
 	}
 
 	/* Perform any power management required */
-	pm_runtime_get_sync(fdp1->dev);
+	ret = pm_runtime_resume_and_get(fdp1->dev);
+	if (ret < 0) {
+		v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
+		v4l2_ctrl_handler_free(&ctx->hdl);
+		kfree(ctx);
+		goto done;
+	}
 
 	v4l2_fh_add(&ctx->fh);
 
@@ -2351,7 +2357,9 @@  static int fdp1_probe(struct platform_device *pdev)
 
 	/* Power up the cells to read HW */
 	pm_runtime_enable(&pdev->dev);
-	pm_runtime_get_sync(fdp1->dev);
+	ret = pm_runtime_resume_and_get(fdp1->dev);
+	if (ret < 0)
+		return ret;
 
 	hw_version = fdp1_read(fdp1, FD1_IP_INTDATA);
 	switch (hw_version) {