[PATCH 5.2 005/144] iio: adc: gyroadc: fix uninitialized return code

[Greg Kroah-Hartman]

From: Arnd Bergmann <a...@arndb.de>

commit 90c6260c1905a68fb596844087f2223bd4657fee upstream.

gcc-9 complains about a blatant uninitialized variable use that
all earlier compiler versions missed:

drivers/iio/adc/rcar-gyroadc.c:510:5: warning: 'ret' may be used uninitialized 
in this function [-Wmaybe-uninitialized]

Return -EINVAL instead here and a few lines above it where
we accidentally return 0 on failure.

Cc: sta...@vger.kernel.org
Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver")
Signed-off-by: Arnd Bergmann <a...@arndb.de>
Reviewed-by: Wolfram Sang <wsa+rene...@sang-engineering.com>
Signed-off-by: Jonathan Cameron <jonathan.came...@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>

---
 drivers/iio/adc/rcar-gyroadc.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/drivers/iio/adc/rcar-gyroadc.c
+++ b/drivers/iio/adc/rcar-gyroadc.c
@@ -382,7 +382,7 @@ static int rcar_gyroadc_parse_subdevs(st
                                dev_err(dev,
                                        "Only %i channels supported with %pOFn, 
but reg = <%i>.\n",
                                        num_channels, child, reg);
-                               return ret;
+                               return -EINVAL;
                        }
                }
 
@@ -391,7 +391,7 @@ static int rcar_gyroadc_parse_subdevs(st
                        dev_err(dev,
                                "Channel %i uses different ADC mode than the 
rest.\n",
                                reg);
-                       return ret;
+                       return -EINVAL;
                }
 
                /* Channel is valid, grab the regulator. */