ALSA: us122l: fix missing unlock in usb_stream_hwdep_vm_fault()

Should unlock us122l->mutex before returning VM_FAULT_SIGBUS.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 7 insertions, 6 deletions

diff --git a/sound/usb/usx2y/us122l.c b/sound/usb/usx2y/us122l.c
index b441fe2cd190..c2515b680f9f 100644
--- a/sound/usb/usx2y/us122l.c
+++ b/sound/usb/usx2y/us122l.c
@@ -118,12 +118,11 @@ static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
         void *vaddr;
         struct us122l *us122l = area->vm_private_data;
         struct usb_stream *s;
-        int vm_f = VM_FAULT_SIGBUS;
 
         mutex_lock(&us122l->mutex);
         s = us122l->sk.s;
         if (!s)
-                goto out;
+                goto unlock;
 
         offset = vmf->pgoff << PAGE_SHIFT;
         if (offset < PAGE_ALIGN(s->read_size))
@@ -131,7 +130,7 @@ static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
         else {
                 offset -= PAGE_ALIGN(s->read_size);
                 if (offset >= PAGE_ALIGN(s->write_size))
-                        goto out;
+                        goto unlock;
 
                 vaddr = us122l->sk.write_page + offset;
         }
@@ -141,9 +140,11 @@ static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
         mutex_unlock(&us122l->mutex);
 
         vmf->page = page;
-        vm_f = 0;
-out:
-        return vm_f;
+
+        return 0;
+unlock:
+        mutex_unlock(&us122l->mutex);
+        return VM_FAULT_SIGBUS;
 }
 
 static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)