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Message-Id: <4e02f26b801f271e80b7738a851b52ab7ffde649.1540209293.git.vilhelm.gray@gmail.com>
Date: Mon, 22 Oct 2018 21:10:06 +0900
From: William Breathitt Gray <vilhelm.gray@...il.com>
To: linus.walleij@...aro.org
Cc: linux@...musvillemoes.dk, linux-gpio@...r.kernel.org,
linux-kernel@...r.kernel.org,
William Breathitt Gray <vilhelm.gray@...il.com>
Subject: [PATCH 5/6] gpio: pci-idio-16: Mask read inputs for get_multiple
This patch masks the read inputs with the word mask in order to ensure
only requested input states are returned in the bits array.
Suggested-by: Rasmus Villemoes <linux@...musvillemoes.dk>
Signed-off-by: William Breathitt Gray <vilhelm.gray@...il.com>
---
drivers/gpio/gpio-pci-idio-16.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpio/gpio-pci-idio-16.c b/drivers/gpio/gpio-pci-idio-16.c
index 25d16b2af1c3..6b7349783223 100644
--- a/drivers/gpio/gpio-pci-idio-16.c
+++ b/drivers/gpio/gpio-pci-idio-16.c
@@ -146,7 +146,7 @@ static int idio_16_gpio_get_multiple(struct gpio_chip *chip,
port_state = ioread8(ports[i]);
/* store acquired bits at respective bits array offset */
- bits[word_index] |= port_state << word_offset;
+ bits[word_index] |= (port_state << word_offset) & word_mask;
}
return 0;
--
2.19.1
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