From: Wolfram Sang <wsa+renesas@sang-engineering.com>
Date: Sat, 9 Jan 2021 12:43:08 +0000 (+0100)
Subject: i2c: octeon: check correct size of maximum RECV_LEN packet
X-Git-Tag: v4.14.218~37
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=46473215597410941b511b48801434bb452c19c1;p=thirdparty%2Fkernel%2Fstable.git

i2c: octeon: check correct size of maximum RECV_LEN packet

[ Upstream commit 1b2cfa2d1dbdcc3b6dba1ecb7026a537a1d7277f ]

I2C_SMBUS_BLOCK_MAX defines already the maximum number as defined in the
SMBus 2.0 specs. No reason to add one to it.

Fixes: 886f6f8337dd ("i2c: octeon: Support I2C_M_RECV_LEN")
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Robert Richter <rric@kernel.org>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/i2c/busses/i2c-octeon-core.c b/drivers/i2c/busses/i2c-octeon-core.c
index 1d87757990568..cd512a93f3ba9 100644
--- a/drivers/i2c/busses/i2c-octeon-core.c
+++ b/drivers/i2c/busses/i2c-octeon-core.c
@@ -346,7 +346,7 @@ static int octeon_i2c_read(struct octeon_i2c *i2c, int target,
 		if (result)
 			return result;
 		if (recv_len && i == 0) {
-			if (data[i] > I2C_SMBUS_BLOCK_MAX + 1)
+			if (data[i] > I2C_SMBUS_BLOCK_MAX)
 				return -EPROTO;
 			length += data[i];
 		}