linux-kernel - [PATCH] doc: mei: fix handling return value of mei_recv

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Date:	Mon, 14 Dec 2015 11:05:59 +0100
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	Tomas Winkler <tomas.winkler@...el.com>
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: [PATCH] doc: mei: fix handling return value of mei_recv_msg

The function can return negative values, so its result should
be assigned to signed variable.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 Documentation/misc-devices/mei/mei-amt-version.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/misc-devices/mei/mei-amt-version.c b/Documentation/misc-devices/mei/mei-amt-version.c
index 57d0d87..33e67bd 100644
--- a/Documentation/misc-devices/mei/mei-amt-version.c
+++ b/Documentation/misc-devices/mei/mei-amt-version.c
@@ -370,7 +370,7 @@ static uint32_t amt_host_if_call(struct amt_host_if *acmd,
 			unsigned int expected_sz)
 {
 	uint32_t in_buf_sz;
-	uint32_t out_buf_sz;
+	ssize_t out_buf_sz;
 	ssize_t written;
 	uint32_t status;
 	struct amt_host_if_resp_header *msg_hdr;
-- 
1.9.1

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