linux-kernel - [PATCH AUTOSEL 5.13 27/29] NTB: Fix an error code in ntb_msit

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Date:   Sat, 11 Sep 2021 09:12:31 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Yang Li <yang.lee@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Jon Mason <jdmason@...zu.us>, Sasha Levin <sashal@...nel.org>,
        linux-ntb@...glegroups.com
Subject: [PATCH AUTOSEL 5.13 27/29] NTB: Fix an error code in ntb_msit_probe()

From: Yang Li <yang.lee@...ux.alibaba.com>

[ Upstream commit 319f83ac98d7afaabab84ce5281a819a358b9895 ]

When the value of nm->isr_ctx is false, the value of ret is 0.
So, we set ret to -ENOMEM to indicate this error.

Clean up smatch warning:
drivers/ntb/test/ntb_msi_test.c:373 ntb_msit_probe() warn: missing
error code 'ret'.

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
Reviewed-by: Logan Gunthorpe <logang@...tatee.com>
Signed-off-by: Jon Mason <jdmason@...zu.us>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/ntb/test/ntb_msi_test.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/ntb/test/ntb_msi_test.c b/drivers/ntb/test/ntb_msi_test.c
index 7095ecd6223a..4e18e08776c9 100644
--- a/drivers/ntb/test/ntb_msi_test.c
+++ b/drivers/ntb/test/ntb_msi_test.c
@@ -369,8 +369,10 @@ static int ntb_msit_probe(struct ntb_client *client, struct ntb_dev *ntb)
 	if (ret)
 		goto remove_dbgfs;
 
-	if (!nm->isr_ctx)
+	if (!nm->isr_ctx) {
+		ret = -ENOMEM;
 		goto remove_dbgfs;
+	}
 
 	ntb_link_enable(ntb, NTB_SPEED_AUTO, NTB_WIDTH_AUTO);
 
-- 
2.30.2