linux-kernel - [PATCH] PCC: fix dereference of ERR

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Message-Id: <1442412264-1701-1-git-send-email-sudipm.mukherjee@gmail.com>
Date:	Wed, 16 Sep 2015 19:34:24 +0530
From:	Sudip Mukherjee <sudipm.mukherjee@...il.com>
To:	Jassi Brar <jassisinghbrar@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH] PCC: fix dereference of ERR_PTR

get_pcc_channel() does not return NULL on error it returns the error code
in ERR_PTR, but we have been checking it for NULL.

Signed-off-by: Sudip Mukherjee <sudip@...torindia.org>
---
 drivers/mailbox/pcc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/mailbox/pcc.c b/drivers/mailbox/pcc.c
index 68885a8..45d85ae 100644
--- a/drivers/mailbox/pcc.c
+++ b/drivers/mailbox/pcc.c
@@ -122,7 +122,7 @@ struct mbox_chan *pcc_mbox_request_channel(struct mbox_client *cl,
 	 */
 	chan = get_pcc_channel(subspace_id);
 
-	if (!chan || chan->cl) {
+	if (IS_ERR(chan) || chan->cl) {
 		dev_err(dev, "Channel not found for idx: %d\n", subspace_id);
 		return ERR_PTR(-EBUSY);
 	}
-- 
1.9.1

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