diff options
| author |   Wolfram Sang <wsa+renesas@sang-engineering.com> | 2016-08-12 18:40:23 +0200 |
|---|---|---|
| committer |   Wolfram Sang <wsa@the-dreams.de> | 2016-08-15 00:55:07 +0200 |
| commit | ce8cb803d8b90458495f23606c706f0c0c857cdc (patch) | |
| tree | c5b0e7654977cc593f27795685b4a2f8ff68e222 /drivers/i2c/muxes | |
| parent | Linux 4.8-rc1 (diff) | |
| download | wireguard-linux-ce8cb803d8b90458495f23606c706f0c0c857cdc.tar.xz wireguard-linux-ce8cb803d8b90458495f23606c706f0c0c857cdc.zip | |
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
Diffstat (limited to 'drivers/i2c/muxes')
| -rw-r--r-- | drivers/i2c/muxes/i2c-demux-pinctrl.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/i2c/muxes/i2c-demux-pinctrl.c b/drivers/i2c/muxes/i2c-demux-pinctrl.c index 8de073aed001..215ac87f606d 100644 --- a/drivers/i2c/muxes/i2c-demux-pinctrl.c +++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c @@ -68,7 +68,7 @@ static int i2c_demux_activate_master(struct i2c_demux_pinctrl_priv *priv, u32 ne 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 @@ static int i2c_demux_activate_master(struct i2c_demux_pinctrl_priv *priv, u32 ne 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; |