V4L: soc-camera: wxplicitly free allocated managed memory on error

Commit Message

Guennadi Liakhovetski May 3, 2014, 4:13 p.m. UTC

devm_kzalloc() allocations are freed when the device is unbound. But if a
certain path fails and the allocated memory cannot be used anyway it is
better to free it explicitly immediately. This patch does exactly this if
asynchronous group probing in scan_async_group() fails after memory has
been allocated.

Signed-off-by: Guennadi Liakhovetski <[e-mail]>
---
 drivers/media/platform/soc_camera/soc_camera.c | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Patch

diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
index 4b8c024..ef5e197 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -1522,14 +1522,14 @@  static int scan_async_group(struct soc_camera_host *ici,
 
 	ret = soc_camera_dyn_pdev(&sdesc, sasc);
 	if (ret < 0)
-		return ret;
+		goto eallocpdev;
 
 	sasc->sensor = &sasd->asd;
 
 	icd = soc_camera_add_pdev(sasc);
 	if (!icd) {
-		platform_device_put(sasc->pdev);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto eaddpdev;
 	}
 
 	sasc->notifier.subdevs = asd;
@@ -1557,7 +1557,11 @@  static int scan_async_group(struct soc_camera_host *ici,
 	v4l2_clk_unregister(icd->clk);
 eclkreg:
 	icd->clk = NULL;
-	platform_device_unregister(sasc->pdev);
+	platform_device_del(sasc->pdev);
+eaddpdev:
+	platform_device_put(sasc->pdev);
+eallocpdev:
+	devm_kfree(ici->v4l2_dev.dev, sasc);
 	dev_err(ici->v4l2_dev.dev, "group probe failed: %d\n", ret);
 
 	return ret;