linux-kernel - [PATCH 4.5 13/88] wlcore: fix error handling in wlcore_event_fw

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Date:	Mon,  9 May 2016 09:21:02 +0200
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Andrzej Hajda <a.hajda@...sung.com>,
	Kalle Valo <kvalo@...eaurora.org>
Subject: [PATCH 4.5 13/88] wlcore: fix error handling in wlcore_event_fw_logger

4.5-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Andrzej Hajda <a.hajda@...sung.com>

commit 68f37e5d7a2e00306adab033fba6c3042b33e8e1 upstream.

wlcore_read/wlcore_write can return negative values so it should
be assigned to signed variable.

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

[1]: http://permalink.gmane.org/gmane.linux.kernel/2120705

Fixes: 3719c17e1816 ("wlcore/wl18xx: fw logger over sdio")
Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/wireless/ti/wlcore/event.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/wireless/ti/wlcore/event.c
+++ b/drivers/net/wireless/ti/wlcore/event.c
@@ -38,7 +38,7 @@
 
 int wlcore_event_fw_logger(struct wl1271 *wl)
 {
-	u32 ret;
+	int ret;
 	struct fw_logger_information fw_log;
 	u8  *buffer;
 	u32 internal_fw_addrbase = WL18XX_DATA_RAM_BASE_ADDRESS;