net/9p: Handle mount errors correctly.
With this patch we have
# mount -t 9p -o trans=virtio virtio2 /mnt/
# mount -t 9p -o trans=virtio virtio2 /mnt/
mount: virtio2 already mounted or /mnt/ busy
mount: according to mtab, virtio2 is already mounted on /mnt
# mount -t 9p -o trans=virtio virtio3 /mnt/ -o debug=0xfff
mount: special device virtio3 does not exist
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>
diff --git a/net/9p/trans_virtio.c b/net/9p/trans_virtio.c
index 05918d3..0aaed48 100644
--- a/net/9p/trans_virtio.c
+++ b/net/9p/trans_virtio.c
@@ -279,6 +279,7 @@
p9_virtio_create(struct p9_client *client, const char *devname, char *args)
{
struct virtio_chan *chan;
+ int ret = -ENOENT;
int found = 0;
mutex_lock(&virtio_9p_lock);
@@ -289,13 +290,14 @@
found = 1;
break;
}
+ ret = -EBUSY;
}
}
mutex_unlock(&virtio_9p_lock);
if (!found) {
printk(KERN_ERR "9p: no channels available\n");
- return -ENODEV;
+ return ret;
}
client->trans = (void *)chan;