From cc6bcf7d2ec2234e7b41770185e4dc826390185e Mon Sep 17 00:00:00 2001 From: "Jeffrey (Sheng-Hui) Chu" Date: Wed, 23 Nov 2011 11:33:07 +0100 Subject: [PATCH] i2c-algo-bit: Generate correct i2c address sequence for 10-bit target The wrong bits were put on the wire, fix that. This fixes kernel bug #42562. Signed-off-by: Sheng-Hui J. Chu Cc: stable@kernel.org Signed-off-by: Jean Delvare --- drivers/i2c/algos/i2c-algo-bit.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/algos/i2c-algo-bit.c b/drivers/i2c/algos/i2c-algo-bit.c index 85584a547c25..525c7345fa0b 100644 --- a/drivers/i2c/algos/i2c-algo-bit.c +++ b/drivers/i2c/algos/i2c-algo-bit.c @@ -488,7 +488,7 @@ static int bit_doAddress(struct i2c_adapter *i2c_adap, struct i2c_msg *msg) if (flags & I2C_M_TEN) { /* a ten bit address */ - addr = 0xf0 | ((msg->addr >> 7) & 0x03); + addr = 0xf0 | ((msg->addr >> 7) & 0x06); bit_dbg(2, &i2c_adap->dev, "addr0: %d\n", addr); /* try extended address code...*/ ret = try_address(i2c_adap, addr, retries); @@ -498,7 +498,7 @@ static int bit_doAddress(struct i2c_adapter *i2c_adap, struct i2c_msg *msg) return -ENXIO; } /* the remaining 8 bit address */ - ret = i2c_outb(i2c_adap, msg->addr & 0x7f); + ret = i2c_outb(i2c_adap, msg->addr & 0xff); if ((ret != 1) && !nak_ok) { /* the chip did not ack / xmission error occurred */ dev_err(&i2c_adap->dev, "died at 2nd address code\n"); -- 2.20.1