[PATCH] gpio: pca9570: Use I2C match data

[Pengpeng Hou]

The driver stores chip metadata in both the OF match table and the I2C
id table, but probe currently reads it with device_get_match_data().
That helper only returns firmware-node match data, so an I2C-id/modalias
match can leave chip_data NULL before the driver dereferences it to read
ngpio.

Use i2c_get_match_data() so the I2C id table driver_data is consumed
when firmware match data is not present.

Signed-off-by: Pengpeng Hou <pengpeng@xxxxxxxxxxx>
---
 drivers/gpio/gpio-pca9570.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpio/gpio-pca9570.c b/drivers/gpio/gpio-pca9570.c
index 4a368803fb03..f0c2fea0f6fe 100644
--- a/drivers/gpio/gpio-pca9570.c
+++ b/drivers/gpio/gpio-pca9570.c
@@ -133,7 +133,7 @@ static int pca9570_probe(struct i2c_client *client)
 	gpio->chip.get = pca9570_get;
 	gpio->chip.set = pca9570_set;
 	gpio->chip.base = -1;
-	gpio->chip_data = device_get_match_data(&client->dev);
+	gpio->chip_data = i2c_get_match_data(client);
 	gpio->chip.ngpio = gpio->chip_data->ngpio;
 	gpio->chip.can_sleep = true;
 
-- 
2.50.1 (Apple Git-155)