linux-kernel - [PATCH] NTB: ntb_tool: Add check for devm

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Message-Id: <20221122033044.5720-1-jiasheng@iscas.ac.cn>
Date:   Tue, 22 Nov 2022 11:30:44 +0800
From:   Jiasheng Jiang <jiasheng@...as.ac.cn>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com, michal.simek@...inx.com, harini.katakam@....com,
        xuhaoyue1@...ilicon.com, huangjunxian6@...ilicon.com,
        wangqing@...o.com, christophe.jaillet@...adoo.fr,
        yangyingliang@...wei.com, chenhao288@...ilicon.com
Cc:     netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>
Subject: [PATCH] NTB: ntb_tool: Add check for devm_kcalloc

As the devm_kcalloc may return NULL pointer,
it should be better to add check for the return
value, as same as the others.

Fixes: 7f46c8b3a552 ("NTB: ntb_tool: Add full multi-port NTB API support")
Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
---
 drivers/ntb/test/ntb_tool.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/ntb/test/ntb_tool.c b/drivers/ntb/test/ntb_tool.c
index 5ee0afa621a9..eeeb4b1c97d2 100644
--- a/drivers/ntb/test/ntb_tool.c
+++ b/drivers/ntb/test/ntb_tool.c
@@ -998,6 +998,8 @@ static int tool_init_mws(struct tool_ctx *tc)
 		tc->peers[pidx].outmws =
 			devm_kcalloc(&tc->ntb->dev, tc->peers[pidx].outmw_cnt,
 				   sizeof(*tc->peers[pidx].outmws), GFP_KERNEL);
+		if (tc->peers[pidx].outmws == NULL)
+			return -ENOMEM;
 
 		for (widx = 0; widx < tc->peers[pidx].outmw_cnt; widx++) {
 			tc->peers[pidx].outmws[widx].pidx = pidx;
-- 
2.25.1