[PATCH 4.7 018/141] i2c: mux: demux-pinctrl: run properly with multiple instances

[Greg Kroah-Hartman]

4.7-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>

commit e35478eac030990e23a56bf11dc074c5a069124a upstream.

We can't use a static property for all the changesets, so we now create
dynamic ones for each changeset.

Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>
Fixes: 50a5ba87690814 ("i2c: mux: demux-pinctrl: add driver")
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/i2c/muxes/i2c-demux-pinctrl.c |   14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

--- a/drivers/i2c/muxes/i2c-demux-pinctrl.c
+++ b/drivers/i2c/muxes/i2c-demux-pinctrl.c
@@ -37,8 +37,6 @@ struct i2c_demux_pinctrl_priv {
 	struct i2c_demux_pinctrl_chan chan[];
 };
 
-static struct property status_okay = { .name = "status", .length = 3, .value = "ok" };
-
 static int i2c_demux_master_xfer(struct i2c_adapter *adap, struct i2c_msg msgs[], int num)
 {
 	struct i2c_demux_pinctrl_priv *priv = adap->algo_data;
@@ -192,6 +190,7 @@ static int i2c_demux_pinctrl_probe(struc
 {
 	struct device_node *np = pdev->dev.of_node;
 	struct i2c_demux_pinctrl_priv *priv;
+	struct property *props;
 	int num_chan, i, j, err;
 
 	num_chan = of_count_phandle_with_args(np, "i2c-parent", NULL);
@@ -202,7 +201,10 @@ static int i2c_demux_pinctrl_probe(struc
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv)
 			   + num_chan * sizeof(struct i2c_demux_pinctrl_chan), GFP_KERNEL);
-	if (!priv)
+
+	props = devm_kcalloc(&pdev->dev, num_chan, sizeof(*props), GFP_KERNEL);
+
+	if (!priv || !props)
 		return -ENOMEM;
 
 	err = of_property_read_string(np, "i2c-bus-name", &priv->bus_name);
@@ -220,8 +222,12 @@ static int i2c_demux_pinctrl_probe(struc
 		}
 		priv->chan[i].parent_np = adap_np;
 
+		props[i].name = devm_kstrdup(&pdev->dev, "status", GFP_KERNEL);
+		props[i].value = devm_kstrdup(&pdev->dev, "ok", GFP_KERNEL);
+		props[i].length = 3;
+
 		of_changeset_init(&priv->chan[i].chgset);
-		of_changeset_update_property(&priv->chan[i].chgset, adap_np, &status_okay);
+		of_changeset_update_property(&priv->chan[i].chgset, adap_np, &props[i]);
 	}
 
 	priv->num_chan = num_chan;