[PATCH 4.4 06/23] 9p/trans_virtio: Remove sysfs file on probe failure

[Greg Kroah-Hartman]

From: Xie Yongji <xieyongji@xxxxxxxxxxxxx>

commit f997ea3b7afc108eb9761f321b57de2d089c7c48 upstream.

This ensures we don't leak the sysfs file if we failed to
allocate chan->vc_wq during probe.

Link: http://lkml.kernel.org/r/20210517083557.172-1-xieyongji@xxxxxxxxxxxxx
Fixes: 86c8437383ac ("net/9p: Add sysfs mount_tag file for virtio 9P device")
Signed-off-by: Xie Yongji <xieyongji@xxxxxxxxxxxxx>
Signed-off-by: Dominique Martinet <asmadeus@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 net/9p/trans_virtio.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -605,7 +605,7 @@ static int p9_virtio_probe(struct virtio
 	chan->vc_wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL);
 	if (!chan->vc_wq) {
 		err = -ENOMEM;
-		goto out_free_tag;
+		goto out_remove_file;
 	}
 	init_waitqueue_head(chan->vc_wq);
 	chan->ring_bufs_avail = 1;
@@ -623,6 +623,8 @@ static int p9_virtio_probe(struct virtio
 
 	return 0;
 
+out_remove_file:
+	sysfs_remove_file(&vdev->dev.kobj, &dev_attr_mount_tag.attr);
 out_free_tag:
 	kfree(tag);
 out_free_vq: