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SubjectRe: [PATCH v1 5/5] [media] stm32-dcmi: g_/s_selection crop support
Hi Hugues,

[auto build test WARNING on linuxtv-media/master]
[also build test WARNING on v4.13-rc2 next-20170728]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Hugues-Fruchet/STM32-DCMI-camera-interface-crop-support/20170730-114803
base: git://linuxtv.org/media_tree.git master
config: powerpc-allmodconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=powerpc

Note: it may well be a FALSE warning. FWIW you are at least aware of it now.
http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings

All warnings (new ones prefixed by >>):

drivers/media//platform/stm32/stm32-dcmi.c: In function 'dcmi_graph_notify_complete':
>> drivers/media//platform/stm32/stm32-dcmi.c:1445:5: warning: 'ret' may be used uninitialized in this function [-Wmaybe-uninitialized]
if (ret) {
^

vim +/ret +1445 drivers/media//platform/stm32/stm32-dcmi.c

1431
1432 static int dcmi_graph_notify_complete(struct v4l2_async_notifier *notifier)
1433 {
1434 struct stm32_dcmi *dcmi = notifier_to_dcmi(notifier);
1435 int ret;
1436
1437 dcmi->vdev->ctrl_handler = dcmi->entity.subdev->ctrl_handler;
1438 ret = dcmi_formats_init(dcmi);
1439 if (ret) {
1440 dev_err(dcmi->dev, "No supported mediabus format found\n");
1441 return ret;
1442 }
1443
1444 ret = dcmi_framesizes_init(dcmi);
> 1445 if (ret) {
1446 dev_err(dcmi->dev, "Could not initialize framesizes\n");
1447 return ret;
1448 }
1449
1450 ret = dcmi_get_sensor_bounds(dcmi, &dcmi->sd_bounds);
1451 if (ret) {
1452 dev_err(dcmi->dev, "Could not get sensor bounds\n");
1453 return ret;
1454 }
1455
1456 ret = dcmi_set_default_fmt(dcmi);
1457 if (ret) {
1458 dev_err(dcmi->dev, "Could not set default format\n");
1459 return ret;
1460 }
1461
1462 ret = video_register_device(dcmi->vdev, VFL_TYPE_GRABBER, -1);
1463 if (ret) {
1464 dev_err(dcmi->dev, "Failed to register video device\n");
1465 return ret;
1466 }
1467
1468 dev_dbg(dcmi->dev, "Device registered as %s\n",
1469 video_device_node_name(dcmi->vdev));
1470 return 0;
1471 }
1472

---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all Intel Corporation
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