From: liuyacan <liuyacan@corp.netease.com>
Date: Wed, 25 May 2022 16:54:08 +0800
Subject: net/smc: set ini->smcrv2.ib_dev_v2 to NULL if SMC-Rv2 is unavailable
Git-commit: b3b1a17538d3ef6a9667b2271216fd16d7678ab5
Patch-mainline: v5.19-rc1
References: git-fixes

In the process of checking whether RDMAv2 is available, the current
implementation first sets ini->smcrv2.ib_dev_v2, and then allocates
smc buf desc and register rmb, but the latter may fail. In this case,
the pointer should be reset.

Fixes: e49300a6bf62 ("net/smc: add listen processing for SMC-Rv2")
Signed-off-by: liuyacan <liuyacan@corp.netease.com>
Reviewed-by: Karsten Graul <kgraul@linux.ibm.com>
Link: https://lore.kernel.org/r/20220525085408.812273-1-liuyacan@corp.netease.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 net/smc/af_smc.c |    1 +
 1 file changed, 1 insertion(+)

--- a/net/smc/af_smc.c
+++ b/net/smc/af_smc.c
@@ -2015,6 +2015,7 @@ static int smc_find_rdma_v2_device_serv(
 not_found:
 	rc = rc ?: SMC_CLC_DECL_NOSMCDEV;
 	ini->smcr_version &= ~SMC_V2;
+	ini->smcrv2.ib_dev_v2 = NULL;
 	ini->check_smcrv2 = false;
 	return rc;
 }