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[media] cx23885: Revert "Check for slave nack on all transactions" 

This reverts commit 44835f197b.

With the CX23885 hardware I2C master, checking for I2C slave ACK/NAK
is not valid when the I2C_EXTEND or I2C_NOSTOP bits are set.
Revert the commit that checks for I2C slave ACK/NAK on all transactions,
so that XC5000 tuners work with the CX23885 again.

Thanks go to Mark Zimmerman for reporting and bisecting this problem.

Bisected-by: Mark Zimmerman <markzimm@frii.com>

Reported-by: Mark Zimmerman <markzimm@frii.com>
Signed-off-by: Andy Walls <awalls@md.metrocast.net>
Cc: stable@kernel.org
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andy Walls 2011-02-13 21:52:50 -03:00 committed by Mauro Carvalho Chehab
parent e192a7cf0e
commit 67914b5c40
1 changed files with 0 additions and 8 deletions
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8
drivers/media/video/cx23885/cx23885-i2c.c
View File

@ -122,10 +122,6 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
if (!i2c_wait_done(i2c_adap))
goto eio;
if (!i2c_slave_did_ack(i2c_adap)) {
retval = -ENXIO;
goto err;
}
if (i2c_debug) {
printk(" <W %02x %02x", msg->addr << 1, msg->buf[0]);
if (!(ctrl & I2C_NOSTOP))
@ -209,10 +205,6 @@ static int i2c_readbytes(struct i2c_adapter *i2c_adap,
if (!i2c_wait_done(i2c_adap))
goto eio;
if (cnt == 0 && !i2c_slave_did_ack(i2c_adap)) {
retval = -ENXIO;
goto err;
}
msg->buf[cnt] = cx_read(bus->reg_rdata) & 0xff;
if (i2c_debug) {
dprintk(1, " %02x", msg->buf[cnt]);