[PATCH 4/5] i2c: mux: pca954x: make use of __i2c_smbus_xfer

[Peter Rosin]

This simplifies the code, and you get retries for free if the adapter
does not support ->master_xfer.

Signed-off-by: Peter Rosin <p...@axentia.se>
---
 drivers/i2c/muxes/i2c-mux-pca954x.c | 27 ++++-----------------------
 1 file changed, 4 insertions(+), 23 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-mux-pca954x.c 
b/drivers/i2c/muxes/i2c-mux-pca954x.c
index fbc748027087..0e9a0e66e92f 100644
--- a/drivers/i2c/muxes/i2c-mux-pca954x.c
+++ b/drivers/i2c/muxes/i2c-mux-pca954x.c
@@ -220,30 +220,11 @@ MODULE_DEVICE_TABLE(of, pca954x_of_match);
 static int pca954x_reg_write(struct i2c_adapter *adap,
                             struct i2c_client *client, u8 val)
 {
-       int ret = -ENODEV;
-
-       if (adap->algo->master_xfer) {
-               struct i2c_msg msg;
-               char buf[1];
-
-               msg.addr = client->addr;
-               msg.flags = 0;
-               msg.len = 1;
-               buf[0] = val;
-               msg.buf = buf;
-               ret = __i2c_transfer(adap, &msg, 1);
-
-               if (ret >= 0 && ret != 1)
-                       ret = -EREMOTEIO;
-       } else {
-               union i2c_smbus_data data;
-               ret = adap->algo->smbus_xfer(adap, client->addr,
-                                            client->flags,
-                                            I2C_SMBUS_WRITE,
-                                            val, I2C_SMBUS_BYTE, &data);
-       }
+       union i2c_smbus_data dummy;
 
-       return ret;
+       return __i2c_smbus_xfer(adap, client->addr, client->flags,
+                               I2C_SMBUS_WRITE, val,
+                               I2C_SMBUS_BYTE, &dummy);
 }
 
 static int pca954x_select_chan(struct i2c_mux_core *muxc, u32 chan)
-- 
2.11.0