From: Karsten Graul <kgraul@linux.ibm.com>
Date: Thu, 11 Apr 2019 11:17:33 +0200
Subject: net/smc: fix return code from FLUSH command
Git-commit: 8ef659f1a840c953a59442ff1400ec73baf3b601
Patch-mainline: v5.1-rc6
References: bsc#1134607 bsc#1134618 LTC#177518 LTC#177520

The FLUSH command is used to empty the pnet table. No return code is
expected from the command. Commit a9d8b0b1e3d6 added namespace support
for the pnet table and changed the FLUSH command processing to call
smc_pnet_remove_by_pnetid() to remove the pnet entries. This function
returns -ENOENT when no entry was deleted, which is now the return code
of the FLUSH command. As a result the FLUSH command will return an error
when the pnet table is already empty.
Restore the expected behavior and let FLUSH always return 0.

Fixes: a9d8b0b1e3d6 ("net/smc: add pnet table namespace support")
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: Ursula Braun <ubraun@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 net/smc/smc_pnet.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/net/smc/smc_pnet.c
+++ b/net/smc/smc_pnet.c
@@ -602,7 +602,8 @@ static int smc_pnet_flush(struct sk_buff
 {
 	struct net *net = genl_info_net(info);
 
-	return smc_pnet_remove_by_pnetid(net, NULL);
+	smc_pnet_remove_by_pnetid(net, NULL);
+	return 0;
 }
 
 /* SMC_PNETID generic netlink operation definition */