linux-kernel - [PATCH] mailbox: mailbox-test: Fix a potential Oops on allocation failure

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Message-ID: <20200603103329.GB1845750@mwanda>
Date:   Wed, 3 Jun 2020 13:33:29 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Jassi Brar <jassisinghbrar@...il.com>
Cc:     Lee Jones <lee.jones@...aro.org>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH] mailbox: mailbox-test: Fix a potential Oops on allocation
 failure

The callers are expecting NULL on error so if we return an error pointer
it eventually results in an Oops.

Fixes: 8ea4484d0c2b ("mailbox: Add generic mechanism for testing Mailbox Controllers")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/mailbox/mailbox-test.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mailbox/mailbox-test.c b/drivers/mailbox/mailbox-test.c
index 4555d678fadda..51640a7999e6b 100644
--- a/drivers/mailbox/mailbox-test.c
+++ b/drivers/mailbox/mailbox-test.c
@@ -327,7 +327,7 @@ mbox_test_request_channel(struct platform_device *pdev, const char *name)
 
 	client = devm_kzalloc(&pdev->dev, sizeof(*client), GFP_KERNEL);
 	if (!client)
-		return ERR_PTR(-ENOMEM);
+		return NULL;
 
 	client->dev		= &pdev->dev;
 	client->rx_callback	= mbox_test_receive_message;
-- 
2.26.2