| Message ID | 20190718135758.2672152-1-arnd@arndb.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v2] iio: adc: gyroadc: fix uninitialized return code | expand |
On Thu, Jul 18, 2019 at 03:57:49PM +0200, Arnd Bergmann wrote: > 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: stable@vger.kernel.org > Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver") > Signed-off-by: Arnd Bergmann <arnd@arndb.de> Yes, I checked the other error paths, too, and they look proper to me. Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
On Thu, 18 Jul 2019 16:02:27 +0200 Wolfram Sang <wsa@the-dreams.de> wrote: > On Thu, Jul 18, 2019 at 03:57:49PM +0200, Arnd Bergmann wrote: > > 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: stable@vger.kernel.org > > Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver") > > Signed-off-by: Arnd Bergmann <arnd@arndb.de> > > Yes, I checked the other error paths, too, and they look proper to me. > > Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> > Thanks for sorting that second case as well. Applied to the fixes-togreg branch of iio.git. Thanks, Jonathan
diff --git a/drivers/iio/adc/rcar-gyroadc.c b/drivers/iio/adc/rcar-gyroadc.c index 2d685730f867..c37f201294b2 100644 --- a/drivers/iio/adc/rcar-gyroadc.c +++ b/drivers/iio/adc/rcar-gyroadc.c @@ -382,7 +382,7 @@ static int rcar_gyroadc_parse_subdevs(struct iio_dev *indio_dev) 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(struct iio_dev *indio_dev) dev_err(dev, "Channel %i uses different ADC mode than the rest.\n", reg); - return ret; + return -EINVAL; } /* Channel is valid, grab the regulator. */
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: stable@vger.kernel.org Fixes: 059c53b32329 ("iio: adc: Add Renesas GyroADC driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> --- v2: fix the second return code as well --- drivers/iio/adc/rcar-gyroadc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)