[PATCH 4/6] gpio: ws16c48: Mask read inputs for get_multiple

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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@xxxxxxxxxxxxxxxxxx>
Signed-off-by: William Breathitt Gray <vilhelm.gray@xxxxxxxxx>
---
 drivers/gpio/gpio-ws16c48.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c
index c7028eb0b8e1..5cf3697bfb15 100644
--- a/drivers/gpio/gpio-ws16c48.c
+++ b/drivers/gpio/gpio-ws16c48.c
@@ -169,7 +169,7 @@ static int ws16c48_gpio_get_multiple(struct gpio_chip *chip,
 		port_state = inb(ws16c48gpio->base + 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




[Index of Archives]     [Linux SPI]     [Linux Kernel]     [Linux ARM (vger)]     [Linux ARM MSM]     [Linux Omap]     [Linux Arm]     [Linux Tegra]     [Fedora ARM]     [Linux for Samsung SOC]     [eCos]     [Linux Fastboot]     [Gcc Help]     [Git]     [DCCP]     [IETF Announce]     [Security]     [Linux MIPS]     [Yosemite Campsites]

  Powered by Linux