1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index c3d79eef9e32..69aee2602aa6 100644
--- a/drivers/isdn/i4l/isdn_common.c
+++ b/drivers/isdn/i4l/isdn_common.c
@@ -1134,9 +1134,12 @@ isdn_read(struct file *file, char __user *buf, size_t count, loff_t * off)
                 if (dev->drv[drvidx]->interface->readstat) {
                         if (count > dev->drv[drvidx]->stavail)
                                 count = dev->drv[drvidx]->stavail;
-                        len = dev->drv[drvidx]->interface->
-                                readstat(buf, count, drvidx,
-                                         isdn_minor2chan(minor));
+                        len = dev->drv[drvidx]->interface->readstat(buf, count,
+                                                drvidx, isdn_minor2chan(minor));
+                        if (len < 0) {
+                                retval = len;
+                                goto out;
+                        }
                 } else {
                         len = 0;
                 }