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i2c: mux: pca954x: retry updating the mux selection on failure 

The cached value of the last selected channel prevents retries on the
next call, even on failure to update the selected channel. Fix that.

Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
This commit is contained in:
Peter Rosin 2016-09-14 15:24:12 +02:00 committed by Wolfram Sang
parent 371a015344
commit 463e8f845c
1 changed files with 1 additions and 1 deletions
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drivers/i2c/muxes/i2c-mux-pca954x.c
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@ -164,7 +164,7 @@ static int pca954x_select_chan(struct i2c_mux_core *muxc, u32 chan)
/* Only select the channel if its different from the last channel */ /* Only select the channel if its different from the last channel */
if (data->last_chan != regval) { if (data->last_chan != regval) {
ret = pca954x_reg_write(muxc->parent, client, regval); ret = pca954x_reg_write(muxc->parent, client, regval);
data->last_chan = regval; data->last_chan = ret ? 0 : regval;
} }
return ret; return ret;