drivers/regulator: use PTR_ERR to get error code

IS_ERR returns only 1 or 0.  The callsite of setup_regulators expects a
negative integer in an error case.  Thus, PTR_ERR has to be used to extract
it.

The semantic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression E,E1;
@@

*E = IS_ERR(...)
 ... when != E = E1
*return E;
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Acked-by: <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/regulator/lp3971.c b/drivers/regulator/lp3971.c
index 7803a320543b..76d08c282f9c 100644
--- a/drivers/regulator/lp3971.c
+++ b/drivers/regulator/lp3971.c
@@ -446,8 +446,8 @@ static int setup_regulators(struct lp3971 *lp3971,
                 lp3971->rdev[i] = regulator_register(&regulators[id],
                         lp3971->dev, pdata->regulators[i].initdata, lp3971);
 
-                err = IS_ERR(lp3971->rdev[i]);
-                if (err) {
+                if (IS_ERR(lp3971->rdev[i])) {
+                        err = PTR_ERR(lp3971->rdev[i]);
                         dev_err(lp3971->dev, "regulator init failed: %d\n",
                                 err);
                         goto error;