PTR_ERR should access the value just tested by IS_ERR

Generated by: scripts/coccinelle/tests/odd_ptr_err.cocci

CC: Tomas Novotny <tomas@novotny.cz>
Signed-off-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
---

Please take the patch only if it's a positive warning. Thanks!

Not checked at all.  This is being reported on the following tree:

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git
testing
head:   2796a310d462f73954c0ce8ffabaf4baacaecca1
commit: e0b80def1faa901d83a7d580e8aa4ad4a512bedf [109/113] iio: dac:
mcp4725: support voltage reference selection
:::::: branch date: 2 hours ago
:::::: commit date: 2 hours ago


 mcp4725.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/iio/dac/mcp4725.c
+++ b/drivers/iio/dac/mcp4725.c
@@ -418,7 +418,7 @@ static int mcp4725_probe(struct i2c_clie
 	if (pdata->use_vref) {
 		data->vref_reg = devm_regulator_get(&client->dev, "vref");
 		if (IS_ERR(data->vref_reg)) {
-			err = PTR_ERR(data->vdd_reg);
+			err = PTR_ERR(data->vref_reg);
 			goto err_disable_vdd_reg;
 		}