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

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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 */
if (data->last_chan != regval) {
ret = pca954x_reg_write(muxc->parent, client, regval);
data->last_chan = regval;
data->last_chan = ret ? 0 : regval;
}
return ret;