diff --git a/[refs] b/[refs]
index 1cc7efc8a4d0..a0a5813d636a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 078d396598401dbaa88d5f95ec45579f9d3dce0e
+refs/heads/master: 04518bfe8eac2e82b476fb2b0093527adc2bc791
diff --git a/trunk/drivers/isdn/i4l/isdn_common.c b/trunk/drivers/isdn/i4l/isdn_common.c
index c3d79eef9e32..69aee2602aa6 100644
--- a/trunk/drivers/isdn/i4l/isdn_common.c
+++ b/trunk/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;
 		}