9p/trans_virtio: Remove sysfs file on probe failure

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@bytedance.com
Fixes: 86c8437383ac ("net/9p: Add sysfs mount_tag file for virtio 9P device")
Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>

diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 2bbd7dce0f1d314b6fd19f37d3bb8969170bfccf..490a4c9003395cbd4111723749635b32a6e2187c 100644 (file)
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -610,7 +610,7 @@ static int p9_virtio_probe(struct virtio_device *vdev)
        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;
@@ -628,6 +628,8 @@ static int p9_virtio_probe(struct virtio_device *vdev)
 
        return 0;
 
+out_remove_file:
+       sysfs_remove_file(&vdev->dev.kobj, &dev_attr_mount_tag.attr);
 out_free_tag:
        kfree(tag);
 out_free_vq: