diff --git a/patches.suse/s390-ctcm-fix-ctcm_new_device-error-return-code.patch b/patches.suse/s390-ctcm-fix-ctcm_new_device-error-return-code.patch
new file mode 100644
index 0000000..db30e9c
--- /dev/null
+++ b/patches.suse/s390-ctcm-fix-ctcm_new_device-error-return-code.patch
@@ -0,0 +1,51 @@
+From: Arnd Bergmann <arnd@arndb.de>
+Date: Wed, 17 Apr 2019 18:29:13 +0200
+Subject: s390: ctcm: fix ctcm_new_device error return code
+Git-commit: 27b141fc234a3670d21bd742c35d7205d03cbb3a
+Patch-mainline: v5.1-rc7
+References: git-fixes bsc#1211361
+
+clang points out that the return code from this function is
+undefined for one of the error paths:
+
+../drivers/s390/net/ctcm_main.c:1595:7: warning: variable 'result' is used uninitialized whenever 'if' condition is true
+      [-Wsometimes-uninitialized]
+                if (priv->channel[direction] == NULL) {
+                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+../drivers/s390/net/ctcm_main.c:1638:9: note: uninitialized use occurs here
+        return result;
+               ^~~~~~
+../drivers/s390/net/ctcm_main.c:1595:3: note: remove the 'if' if its condition is always false
+                if (priv->channel[direction] == NULL) {
+                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+../drivers/s390/net/ctcm_main.c:1539:12: note: initialize the variable 'result' to silence this warning
+        int result;
+                  ^
+
+Make it return -ENODEV here, as in the related failure cases.
+gcc has a known bug in underreporting some of these warnings
+when it has already eliminated the assignment of the return code
+based on some earlier optimization step.
+
+Reviewed-by: Nathan Chancellor <natechancellor@gmail.com>
+Signed-off-by: Arnd Bergmann <arnd@arndb.de>
+Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+Acked-by: Miroslav Franc <mfranc@suse.cz>
+---
+ drivers/s390/net/ctcm_main.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/drivers/s390/net/ctcm_main.c b/drivers/s390/net/ctcm_main.c
+index 7617d21cb296..f63c5c871d3d 100644
+--- a/drivers/s390/net/ctcm_main.c
++++ b/drivers/s390/net/ctcm_main.c
+@@ -1595,6 +1595,7 @@ static int ctcm_new_device(struct ccwgroup_device *cgdev)
+ 		if (priv->channel[direction] == NULL) {
+ 			if (direction == CTCM_WRITE)
+ 				channel_free(priv->channel[CTCM_READ]);
++			result = -ENODEV;
+ 			goto out_dev;
+ 		}
+ 		priv->channel[direction]->netdev = dev;
+
diff --git a/series.conf b/series.conf
index f4cd89b..c063830 100644
--- a/series.conf
+++ b/series.conf
@@ -48941,6 +48941,7 @@
 	patches.suse/sunrpc-don-t-mark-uninitialised-items-as-VALID.patch
 	patches.suse/nfsd-Don-t-release-the-callback-slot-unless-it-was-a.patch
 	patches.suse/ipv4-set-the-tcp_min_rtt_wlen-range-from-0-to-one-da.patch
+	patches.suse/s390-ctcm-fix-ctcm_new_device-error-return-code.patch
 	patches.suse/mlxsw-spectrum-Put-MC-TCs-into-DWRR-mode.patch
 	patches.suse/mlxsw-pci-Reincrease-PCI-reset-timeout.patch
 	patches.suse/mlxsw-spectrum-Fix-autoneg-status-in-ethtool.patch