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Input: ads7846 - fix unaligned access on 7845

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[ Upstream commit 03e2c9c782 ]

req->sample[1] is not naturally aligned at word boundary, and therefore we
should use get_unaligned_be16() when accessing it.

Fixes: 3eac5c7e44 ("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>
This commit is contained in:
Dmitry Torokhov
2020-11-11 17:17:11 -08:00
committed by Chris
parent b312f09e31
commit 8ea1ef83d0
1 changed files with 2 additions and 1 deletions
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3
drivers/input/touchscreen/ads7846.c
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@@ -37,6 +37,7 @@
#endif
#include <linux/module.h>
#include <asm/irq.h>
#include <asm/unaligned.h>
#if defined(CONFIG_ARCH_MESON64_ODROID_COMMON)
#include <linux/amlogic/aml_gpio_consumer.h>
@@ -421,7 +422,7 @@ 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;
}