linux-kernel - [PATCH v1] Input: ads7846: ads7846_get_value

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Date:   Wed,  7 Jul 2021 14:41:15 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Alexandru Ardelean <alexandru.ardelean@...log.com>,
        Mark Brown <broonie@...nel.org>
Cc:     Oleksij Rempel <o.rempel@...gutronix.de>,
        kernel test robot <lkp@...el.com>, kernel@...gutronix.de,
        linux-kernel@...r.kernel.org, linux-input@...r.kernel.org,
        linux-spi@...r.kernel.org, David Jander <david@...tonic.nl>
Subject: [PATCH v1] Input: ads7846: ads7846_get_value - fix unaligned pointer value warning

Fix warning reported by the kernel test robot:
drivers/input/touchscreen/ads7846.c:705:24: warning: taking address
of packed member 'data' of class or structure 'ads7846_buf' may result
in an unaligned pointer value [-Waddress-of-packed-member]

Fixes: 6965eece2a89 ("Input: ads7846 - convert to one message")
Reported-by: kernel test robot <lkp@...el.com>
Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
---
 drivers/input/touchscreen/ads7846.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c
index adb4c2230c31..1987dedac94f 100644
--- a/drivers/input/touchscreen/ads7846.c
+++ b/drivers/input/touchscreen/ads7846.c
@@ -702,7 +702,7 @@ static int ads7846_get_value(struct ads7846_buf *buf)
 {
 	int value;
 
-	value = be16_to_cpup(&buf->data);
+	value = get_unaligned_be16(&buf->data);
 
 	/* enforce ADC output is 12 bits width */
 	return (value >> 3) & 0xfff;
-- 
2.30.2