ALSA: xen-front: freeing an error pointer

kfree() doesn't accept error pointers so I've set "str" to NULL on these
paths.

Fixes: fd3b36045c2c ("ALSA: xen-front: Read sound driver configuration from Xen store")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oleksandr Andrushchenko <oleksandr_andrushchenko@epam.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 2 insertions, 0 deletions

diff --git a/sound/xen/xen_snd_front_cfg.c b/sound/xen/xen_snd_front_cfg.c
index 684b5f1d51ac..eda077c8087a 100644
--- a/sound/xen/xen_snd_front_cfg.c
+++ b/sound/xen/xen_snd_front_cfg.c
@@ -306,6 +306,7 @@ static int cfg_get_stream_type(const char *path, int index,
         str = xenbus_read(XBT_NIL, stream_path, XENSND_FIELD_TYPE, NULL);
         if (IS_ERR(str)) {
                 ret = PTR_ERR(str);
+                str = NULL;
                 goto fail;
         }
 
@@ -347,6 +348,7 @@ static int cfg_stream(struct xen_snd_front_info *front_info,
         str = xenbus_read(XBT_NIL, stream_path, XENSND_FIELD_TYPE, NULL);
         if (IS_ERR(str)) {
                 ret = PTR_ERR(str);
+                str = NULL;
                 goto fail;
         }