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path: root/drivers/media/video/cx23885/cx23885-i2c.c
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Diffstat (limited to 'drivers/media/video/cx23885/cx23885-i2c.c')
-rw-r--r--drivers/media/video/cx23885/cx23885-i2c.c27
1 files changed, 13 insertions, 14 deletions
diff --git a/drivers/media/video/cx23885/cx23885-i2c.c b/drivers/media/video/cx23885/cx23885-i2c.c
index d4746e064516..1a391486e551 100644
--- a/drivers/media/video/cx23885/cx23885-i2c.c
+++ b/drivers/media/video/cx23885/cx23885-i2c.c
@@ -99,7 +99,7 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
if (!i2c_wait_done(i2c_adap))
return -EIO;
if (!i2c_slave_did_ack(i2c_adap))
- return -EIO;
+ return -ENXIO;
dprintk(1, "%s() returns 0\n", __func__);
return 0;
@@ -120,11 +120,12 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
cx_write(bus->reg_wdata, wdata);
cx_write(bus->reg_ctrl, ctrl);
- retval = i2c_wait_done(i2c_adap);
- if (retval < 0)
- goto err;
- if (retval == 0)
+ 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))
@@ -145,10 +146,7 @@ static int i2c_sendbytes(struct i2c_adapter *i2c_adap,
cx_write(bus->reg_wdata, wdata);
cx_write(bus->reg_ctrl, ctrl);
- retval = i2c_wait_done(i2c_adap);
- if (retval < 0)
- goto err;
- if (retval == 0)
+ if (!i2c_wait_done(i2c_adap))
goto eio;
if (i2c_debug) {
dprintk(1, " %02x", msg->buf[cnt]);
@@ -185,7 +183,7 @@ static int i2c_readbytes(struct i2c_adapter *i2c_adap,
if (!i2c_wait_done(i2c_adap))
return -EIO;
if (!i2c_slave_did_ack(i2c_adap))
- return -EIO;
+ return -ENXIO;
dprintk(1, "%s() returns 0\n", __func__);
@@ -209,11 +207,12 @@ static int i2c_readbytes(struct i2c_adapter *i2c_adap,
cx_write(bus->reg_addr, msg->addr << 25);
cx_write(bus->reg_ctrl, ctrl);
- retval = i2c_wait_done(i2c_adap);
- if (retval < 0)
- goto err;
- if (retval == 0)
+ 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]);