From: Tin Huynh <tnhuynh@apm.com>
Date: Mon, 22 May 2017 09:19:20 +0000 (+0700)
Subject: leds: pca955x: Correct I2C Functionality
X-Git-Tag: v3.18.105~85
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=be622831649a4223be0d3da88403b6774ab354f0;p=thirdparty%2Fkernel%2Fstable.git

leds: pca955x: Correct I2C Functionality


[ Upstream commit aace34c0bb8ea3c8bdcec865b6a4be4db0a68e33 ]

The driver checks an incorrect flag of functionality of adapter.
When a driver requires i2c_smbus_read_byte_data and
i2c_smbus_write_byte_data, it should check I2C_FUNC_SMBUS_BYTE_DATA
instead I2C_FUNC_I2C.
This patch fixes the problem.

Signed-off-by: Tin Huynh <tnhuynh@apm.com>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/leds/leds-pca955x.c b/drivers/leds/leds-pca955x.c
index c3a08b60535bc..760deffa9ad30 100644
--- a/drivers/leds/leds-pca955x.c
+++ b/drivers/leds/leds-pca955x.c
@@ -281,7 +281,7 @@ static int pca955x_probe(struct i2c_client *client,
 			"slave address 0x%02x\n",
 			id->name, chip->bits, client->addr);
 
-	if (!i2c_check_functionality(adapter, I2C_FUNC_I2C))
+	if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 		return -EIO;
 
 	if (pdata) {