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Date: Thu, 10 Nov 2022 09:57:04 +0300
From: Dan Carpenter <error27@...il.com>
To: oe-kbuild@...ts.linux.dev,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev,
Yong Deng <yong.deng@...ewell.com>,
Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Chen-Yu Tsai <wens@...e.org>,
Jernej Skrabec <jernej.skrabec@...il.com>,
Samuel Holland <samuel@...lland.org>,
Laurent Pinchart <laurent.pinchart@...asonboard.com>,
Maxime Ripard <mripard@...nel.org>,
Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v7 01/28] media: sun6i-csi: Add bridge v4l2 subdev with
port management
Hi Paul,
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Paul-Kocialkowski/Allwinner-A31-A83T-MIPI-CSI-2-and-A31-ISP-CSI-Rework/20221104-003518
base: git://linuxtv.org/media_tree.git master
patch link: https://lore.kernel.org/r/20221103163113.245462-2-paul.kocialkowski%40bootlin.com
patch subject: [PATCH v7 01/28] media: sun6i-csi: Add bridge v4l2 subdev with port management
config: arc-randconfig-m041-20221107
compiler: arc-elf-gcc (GCC) 12.1.0
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
| Reported-by: Dan Carpenter <error27@...il.com>
smatch warnings:
drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c:86 sun6i_csi_bridge_s_stream() warn: missing error code 'ret'
drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c:279 sun6i_csi_bridge_notifier_bound() error: uninitialized symbol 'enabled'.
vim +/ret +86 drivers/media/platform/sunxi/sun6i-csi/sun6i_csi_bridge.c
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 62 static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on)
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 63 {
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 64 struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 65 struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 66 struct media_pad *local_pad = &bridge->pads[SUN6I_CSI_BRIDGE_PAD_SINK];
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 67 struct device *dev = csi_dev->dev;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 68 struct v4l2_subdev *source_subdev;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 69 struct media_pad *remote_pad;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 70 /* Initialize to 0 to use both in disable label (ret != 0) and off. */
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 71 int ret = 0;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 72
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 73 /* Source */
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 74
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 75 remote_pad = media_pad_remote_pad_unique(local_pad);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 76 if (IS_ERR(remote_pad)) {
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 77 dev_err(dev,
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 78 "zero or more than a single source connected to the bridge\n");
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 79 return PTR_ERR(remote_pad);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 80 }
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 81
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 82 source_subdev = media_entity_to_v4l2_subdev(remote_pad->entity);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 83
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 84 if (!on) {
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 85 v4l2_subdev_call(source_subdev, video, s_stream, 0);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 @86 goto disable;
This is intentional, but it should just return 0;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 87 }
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 88
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 89 ret = v4l2_subdev_call(source_subdev, video, s_stream, 1);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 90 if (ret && ret != -ENOIOCTLCMD)
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 91 goto disable;
Do we really need to clean anything up? Why not just:
source_subdev = media_entity_to_v4l2_subdev(remote_pad->entity);
return v4l2_subdev_call(source_subdev, video, s_stream, !!on);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 92
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 93 return 0;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 94
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 95 disable:
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 96
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 97 return ret;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 98 }
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 99
[ snip ]
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 254 static int
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 255 sun6i_csi_bridge_notifier_bound(struct v4l2_async_notifier *notifier,
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 256 struct v4l2_subdev *remote_subdev,
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 257 struct v4l2_async_subdev *async_subdev)
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 258 {
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 259 struct sun6i_csi_device *csi_dev =
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 260 container_of(notifier, struct sun6i_csi_device,
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 261 bridge.notifier);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 262 struct sun6i_csi_bridge_async_subdev *bridge_async_subdev =
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 263 container_of(async_subdev, struct sun6i_csi_bridge_async_subdev,
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 264 async_subdev);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 265 struct sun6i_csi_bridge_source *source = bridge_async_subdev->source;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 266 bool enabled;
This neesds to be "bool enabled = false;"
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 267
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 268 switch (source->endpoint.base.port) {
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 269 case SUN6I_CSI_PORT_PARALLEL:
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 270 enabled = true;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 271 break;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 272 default:
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 273 break;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 274 }
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 275
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 276 source->subdev = remote_subdev;
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 277
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 278 return sun6i_csi_bridge_link(csi_dev, SUN6I_CSI_BRIDGE_PAD_SINK,
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 @279 remote_subdev, enabled);
d26de0b15ad9da7 Paul Kocialkowski 2022-11-03 280 }
--
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