[PATCH] ISDN: fix drivers, by handling errors thrown by ->readstat()

[pandora-kernel.git] / drivers / isdn / i4l / isdn_common.c

diff --git a/drivers/isdn/i4l/isdn_common.c b/drivers/isdn/i4l/isdn_common.c
index c3d79ee..69aee26 100644 (file)
--- 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;
                }