i2c: gpio: suppress error on probe defer

If a GPIO we are trying to use is not available and we are deferring
the probe, don't output an error message.
This seems to have been the intent of commit 05c7477
("i2c: gpio: Add support for named gpios in DT") but the error was
still output due to not checking the updated 'retdesc'.

Fixes: 05c7477 ("i2c: gpio: Add support for named gpios in DT")
Signed-off-by: Hamish Martin <[email protected]>
Acked-by: Linus Walleij <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>

Author: Hamish Martin

drivers/i2c/busses/i2c-gpio.c

@@ -348,7 +348,7 @@ static struct gpio_desc *i2c_gpio_get_desc(struct device *dev,
 	if (ret == -ENOENT)
 		retdesc = ERR_PTR(-EPROBE_DEFER);
 
-	if (ret != -EPROBE_DEFER)
+	if (PTR_ERR(retdesc) != -EPROBE_DEFER)
 		dev_err(dev, "error trying to get descriptor: %d\n", ret);
 
 	return retdesc;