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Patch "media: hdpvr: Fix an error handling path in hdpvr_probe()" has been added to the 4.9-stable tree

PATCH [email protected] 1 participant 1 message Feb 13, 2018

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Stable branch Media (V4L/DVB) Hdpvr USB video encoder driver
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This is a note to let you know that I've just added the patch titled

media: hdpvr: Fix an error handling path in hdpvr_probe()

to the 4.9-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-hdpvr-fix-an-error-handling-path-in-hdpvr_probe.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Quoted 1 line

From c0f71bbb810237a38734607ca4599632f7f5d47f Mon Sep 17 00:00:00 2001

From: Arvind Yadav <[email protected]>
Date: Fri, 22 Sep 2017 09:07:06 -0400
Subject: media: hdpvr: Fix an error handling path in hdpvr_probe()

From: Arvind Yadav <[email protected]>

commit c0f71bbb810237a38734607ca4599632f7f5d47f upstream.

Here, hdpvr_register_videodev() is responsible for setup and register a video device. Also defining and initializing a worker. hdpvr_register_videodev() is calling by hdpvr_probe at last. So no need to flush any work here.
Unregister v4l2, free buffers and memory. If hdpvr_probe() will fail.

Signed-off-by Arvind Yadav <[email protected]>
Reported-by Andrey Konovalov <[email protected]>
Tested-by Andrey Konovalov <[email protected]>
Signed-off-by Hans Verkuil <[email protected]>
Signed-off-by Mauro Carvalho Chehab <[email protected]>
Cc Ben Hutchings <[email protected]>
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/media/usb/hdpvr/hdpvr-core.c |   26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)
drivers/media/usb/hdpvr/hdpvr-core.c +15 -11
@@ -295,7 +295,7 @@ static int hdpvr_probe(struct usb_interf
 	/* register v4l2_device early so it can be used for printks */
 	if (v4l2_device_register(&interface->dev, &dev->v4l2_dev)) {
 		dev_err(&interface->dev, "v4l2_device_register failed\n");
-		goto error;
+		goto error_free_dev;
 	}
 
 	mutex_init(&dev->io_mutex);

@@ -304,7 +304,7 @@ static int hdpvr_probe(struct usb_interf
 	dev->usbc_buf = kmalloc(64, GFP_KERNEL);
 	if (!dev->usbc_buf) {
 		v4l2_err(&dev->v4l2_dev, "Out of memory\n");
-		goto error;
+		goto error_v4l2_unregister;
 	}
 
 	init_waitqueue_head(&dev->wait_buffer);

@@ -342,13 +342,13 @@ static int hdpvr_probe(struct usb_interf
 	}
 	if (!dev->bulk_in_endpointAddr) {
 		v4l2_err(&dev->v4l2_dev, "Could not find bulk-in endpoint\n");
-		goto error;
+		goto error_put_usb;
 	}
 
 	/* init the device */
 	if (hdpvr_device_init(dev)) {
 		v4l2_err(&dev->v4l2_dev, "device init failed\n");
-		goto error;
+		goto error_put_usb;
 	}
 
 	mutex_lock(&dev->io_mutex);

@@ -356,7 +356,7 @@ static int hdpvr_probe(struct usb_interf
 		mutex_unlock(&dev->io_mutex);
 		v4l2_err(&dev->v4l2_dev,
 			 "allocating transfer buffers failed\n");
-		goto error;
+		goto error_put_usb;
 	}
 	mutex_unlock(&dev->io_mutex);
 

@@ -364,7 +364,7 @@ static int hdpvr_probe(struct usb_interf
 	retval = hdpvr_register_i2c_adapter(dev);
 	if (retval < 0) {
 		v4l2_err(&dev->v4l2_dev, "i2c adapter register failed\n");
-		goto error;
+		goto error_free_buffers;
 	}
 
 	client = hdpvr_register_ir_rx_i2c(dev);

@@ -397,13 +397,17 @@ static int hdpvr_probe(struct usb_interf
 reg_fail:
 #if IS_ENABLED(CONFIG_I2C)
 	i2c_del_adapter(&dev->i2c_adapter);
+error_free_buffers:
 #endif
+	hdpvr_free_buffers(dev);
+error_put_usb:
+	usb_put_dev(dev->udev);
+	kfree(dev->usbc_buf);
+error_v4l2_unregister:
+	v4l2_device_unregister(&dev->v4l2_dev);
+error_free_dev:
+	kfree(dev);
 error:
-	if (dev) {
-		flush_work(&dev->worker);
-		/* this frees allocated memory */
-		hdpvr_delete(dev);
-	}
 	return retval;
 }

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/media-hdpvr-fix-an-error-handling-path-in-hdpvr_probe.patch