From: Dmitry Torokhov dmitry.torokhov@gmail.com
[ Upstream commit 03e2c9c782f721b661a0e42b1b58f394b5298544 ]
req->sample[1] is not naturally aligned at word boundary, and therefore we should use get_unaligned_be16() when accessing it.
Fixes: 3eac5c7e44f3 ("Input: ads7846 - extend the driver for ads7845 controller support") Signed-off-by: Dmitry Torokhov dmitry.torokhov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/input/touchscreen/ads7846.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/input/touchscreen/ads7846.c b/drivers/input/touchscreen/ads7846.c index 7ce0eedaa0e5e..b536768234b7c 100644 --- a/drivers/input/touchscreen/ads7846.c +++ b/drivers/input/touchscreen/ads7846.c @@ -35,6 +35,7 @@ #include <linux/regulator/consumer.h> #include <linux/module.h> #include <asm/irq.h> +#include <asm/unaligned.h>
/* * This code has been heavily tested on a Nokia 770, and lightly @@ -434,7 +435,7 @@ static int ads7845_read12_ser(struct device *dev, unsigned command)
if (status == 0) { /* BE12 value, then padding */ - status = be16_to_cpu(*((u16 *)&req->sample[1])); + status = get_unaligned_be16(&req->sample[1]); status = status >> 3; status &= 0x0fff; }