[media] dvb: unlock on error in dvb_ca_en50221_io_do_ioctl()

We recently pushed the locking down into this function, but there was
an error path where the unlock was missed.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/media/dvb-core/dvb_ca_en50221.c b/drivers/media/dvb-core/dvb_ca_en50221.c
index 190e5e0f48c7..0aac3096728e 100644
--- a/drivers/media/dvb-core/dvb_ca_en50221.c
+++ b/drivers/media/dvb-core/dvb_ca_en50221.c
@@ -1227,8 +1227,10 @@ static int dvb_ca_en50221_io_do_ioctl(struct file *file,
         case CA_GET_SLOT_INFO: {
                 struct ca_slot_info *info = parg;
 
-                if ((info->num > ca->slot_count) || (info->num < 0))
-                        return -EINVAL;
+                if ((info->num > ca->slot_count) || (info->num < 0)) {
+                        err = -EINVAL;
+                        goto out_unlock;
+                }
 
                 info->type = CA_CI_LINK;
                 info->flags = 0;
@@ -1247,6 +1249,7 @@ static int dvb_ca_en50221_io_do_ioctl(struct file *file,
                 break;
         }
 
+out_unlock:
         mutex_unlock(&ca->ioctl_mutex);
         return err;
 }