linux-kernel - [PATCH 4.14 243/496] can: m_can: change comparison to bitshift when dealing with a mask

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Date:   Mon, 28 May 2018 12:00:28 +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,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.14 243/496] can: m_can: change comparison to bitshift when dealing with a mask

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

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

From: Wolfram Sang <wsa+renesas@...g-engineering.com>

[ Upstream commit b7db978ac283b237835129ac87f26cbac94d04e7 ]

Due to a typo, the mask was destroyed by a comparison instead of a bit
shift.

Reported-by: Geert Uytterhoeven <geert+renesas@...der.be>
Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/can/m_can/m_can.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/can/m_can/m_can.c
+++ b/drivers/net/can/m_can/m_can.c
@@ -246,7 +246,7 @@ enum m_can_mram_cfg {
 
 /* Rx FIFO 0/1 Configuration (RXF0C/RXF1C) */
 #define RXFC_FWM_SHIFT	24
-#define RXFC_FWM_MASK	(0x7f < RXFC_FWM_SHIFT)
+#define RXFC_FWM_MASK	(0x7f << RXFC_FWM_SHIFT)
 #define RXFC_FS_SHIFT	16
 #define RXFC_FS_MASK	(0x7f << RXFC_FS_SHIFT)