Patch "gpio: pca953x: Use correct u16 value for register word write" has been added to the 4.5-stable tree

Patch "gpio: pca953x: Use correct u16 value for register word write" has been added to the 4.5-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    gpio: pca953x: Use correct u16 value for register word write

to the 4.5-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpio-pca953x-use-correct-u16-value-for-register-word-write.patch
and it can be found in the queue-4.5 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9b8e3ec34318663affced3c14d960e78d760dd9a Mon Sep 17 00:00:00 2001
From: Yong Li <sdliyong@gmail.com>
Date: Wed, 30 Mar 2016 14:49:14 +0800
Subject: gpio: pca953x: Use correct u16 value for register word write

From: Yong Li <sdliyong@gmail.com>

commit 9b8e3ec34318663affced3c14d960e78d760dd9a upstream.

The current implementation only uses the first byte in val,
the second byte is always 0. Change it to use cpu_to_le16
to write the two bytes into the register

Signed-off-by: Yong Li <sdliyong@gmail.com>
Reviewed-by: Phil Reid <preid@electromag.com.au>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpio/gpio-pca953x.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -18,6 +18,7 @@
 #include <linux/i2c.h>
 #include <linux/platform_data/pca953x.h>
 #include <linux/slab.h>
+#include <asm/unaligned.h>
 #include <linux/of_platform.h>
 #include <linux/acpi.h>
 
@@ -159,7 +160,7 @@ static int pca953x_write_regs(struct pca
 		switch (chip->chip_type) {
 		case PCA953X_TYPE:
 			ret = i2c_smbus_write_word_data(chip->client,
-							reg << 1, (u16) *val);
+			    reg << 1, cpu_to_le16(get_unaligned((u16 *)val)));
 			break;
 		case PCA957X_TYPE:
 			ret = i2c_smbus_write_byte_data(chip->client, reg << 1,


Patches currently in stable-queue which might be from sdliyong@gmail.com are

queue-4.5/gpio-pca953x-use-correct-u16-value-for-register-word-write.patch