i2c: mux: demux-pinctrl: properly roll back when adding adapter fails
We also need to revert the dynamic OF change, so we get a consistent
state again. Otherwise, we might have two devices enabled e.g. after
pinctrl setup fails.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Cc: stable@kernel.org
diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c
index 8de073a..215ac87 100644
--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -68,7 +68,7 @@
adap = of_find_i2c_adapter_by_node(priv->chan[new_chan].parent_np);
if (!adap) {
ret = -ENODEV;
- goto err;
+ goto err_with_revert;
}
p = devm_pinctrl_get_select(adap->dev.parent, priv->bus_name);
@@ -103,6 +103,8 @@
err_with_put:
i2c_put_adapter(adap);
+ err_with_revert:
+ of_changeset_revert(&priv->chan[new_chan].chgset);
err:
dev_err(priv->dev, "failed to setup demux-adapter %d (%d)\n", new_chan, ret);
return ret;