From 9f87ee85ce1dd0a4b4e0d2fde307fac69d13d982 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Wed, 15 Feb 2023 17:18:39 +0200 Subject: [PATCH] media: Prefer designated initializers over memset for subdev pad ops [ Upstream commit e3a69496a1cde364c74a600d7a370179b58aed29 ] Structures passed to subdev pad operations are all zero-initialized, but not always with the same kind of code constructs. While most drivers used designated initializers, which zero all the fields that are not specified, when declaring variables, some use memset(). Those two methods lead to the same end result, and, depending on compiler optimizations, may even be completely equivalent, but they're not consistent. Improve coding style consistency by using designated initializers instead of calling memset(). Where applicable, also move the variables to inner scopes of for loops to ensure correct initialization in all iterations. Signed-off-by: Laurent Pinchart Reviewed-by: Lad Prabhakar # For am437x Acked-by: Sakari Ailus Reviewed-by: Tomi Valkeinen Reviewed-by: Kieran Bingham Reviewed-by: Philipp Zabel Signed-off-by: Hans Verkuil Signed-off-by: Sasha Levin --- drivers/media/platform/am437x/am437x-vpfe.c | 15 ++++++++------- .../media/platform/exynos4-is/fimc-capture.c | 7 ++++--- drivers/media/platform/ti-vpe/cal-video.c | 8 ++++---- drivers/media/platform/vsp1/vsp1_drm.c | 18 +++++++++--------- drivers/media/platform/vsp1/vsp1_entity.c | 11 +++++------ drivers/media/usb/dvb-usb/cxusb-analog.c | 14 +++++++------- drivers/staging/media/imx/imx-media-capture.c | 12 ++++++------ drivers/staging/media/imx/imx-media-utils.c | 8 ++++---- drivers/staging/media/omap4iss/iss_video.c | 6 +++--- 9 files changed, 50 insertions(+), 49 deletions(-) diff --git a/drivers/media/platform/am437x/am437x-vpfe.c b/drivers/media/platform/am437x/am437x-vpfe.c index 1c9cb9e05fdf..c1ce93efc655 100644 --- a/drivers/media/platform/am437x/am437x-vpfe.c +++ b/drivers/media/platform/am437x/am437x-vpfe.c @@ -1499,7 +1499,9 @@ static int vpfe_enum_size(struct file *file, void *priv, struct v4l2_frmsizeenum *fsize) { struct vpfe_device *vpfe = video_drvdata(file); - struct v4l2_subdev_frame_size_enum fse; + struct v4l2_subdev_frame_size_enum fse = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; struct v4l2_subdev *sd = vpfe->current_subdev->sd; struct vpfe_fmt *fmt; int ret; @@ -1514,11 +1516,9 @@ static int vpfe_enum_size(struct file *file, void *priv, memset(fsize->reserved, 0x0, sizeof(fsize->reserved)); - memset(&fse, 0x0, sizeof(fse)); fse.index = fsize->index; fse.pad = 0; fse.code = fmt->code; - fse.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(sd, pad, enum_frame_size, NULL, &fse); if (ret) return ret; @@ -2146,7 +2146,6 @@ vpfe_async_bound(struct v4l2_async_notifier *notifier, { struct vpfe_device *vpfe = container_of(notifier->v4l2_dev, struct vpfe_device, v4l2_dev); - struct v4l2_subdev_mbus_code_enum mbus_code; struct vpfe_subdev_info *sdinfo; struct vpfe_fmt *fmt; int ret = 0; @@ -2173,9 +2172,11 @@ vpfe_async_bound(struct v4l2_async_notifier *notifier, vpfe->num_active_fmt = 0; for (j = 0, i = 0; (ret != -EINVAL); ++j) { - memset(&mbus_code, 0, sizeof(mbus_code)); - mbus_code.index = j; - mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE; + struct v4l2_subdev_mbus_code_enum mbus_code = { + .index = j, + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + ret = v4l2_subdev_call(subdev, pad, enum_mbus_code, NULL, &mbus_code); if (ret) diff --git a/drivers/media/platform/exynos4-is/fimc-capture.c b/drivers/media/platform/exynos4-is/fimc-capture.c index 7ff4024003f4..0b3cf01e9537 100644 --- a/drivers/media/platform/exynos4-is/fimc-capture.c +++ b/drivers/media/platform/exynos4-is/fimc-capture.c @@ -763,7 +763,10 @@ static int fimc_pipeline_try_format(struct fimc_ctx *ctx, struct fimc_dev *fimc = ctx->fimc_dev; struct fimc_pipeline *p = to_fimc_pipeline(fimc->vid_cap.ve.pipe); struct v4l2_subdev *sd = p->subdevs[IDX_SENSOR]; - struct v4l2_subdev_format sfmt; + struct v4l2_subdev_format sfmt = { + .which = set ? V4L2_SUBDEV_FORMAT_ACTIVE + : V4L2_SUBDEV_FORMAT_TRY, + }; struct v4l2_mbus_framefmt *mf = &sfmt.format; struct media_entity *me; struct fimc_fmt *ffmt; @@ -774,9 +777,7 @@ static int fimc_pipeline_try_format(struct fimc_ctx *ctx, if (WARN_ON(!sd || !tfmt)) return -EINVAL; - memset(&sfmt, 0, sizeof(sfmt)); sfmt.format = *tfmt; - sfmt.which = set ? V4L2_SUBDEV_FORMAT_ACTIVE : V4L2_SUBDEV_FORMAT_TRY; me = fimc_pipeline_get_head(&sd->entity); diff --git a/drivers/media/platform/ti-vpe/cal-video.c b/drivers/media/platform/ti-vpe/cal-video.c index 3e936a2ca36c..d87177d04e92 100644 --- a/drivers/media/platform/ti-vpe/cal-video.c +++ b/drivers/media/platform/ti-vpe/cal-video.c @@ -814,7 +814,6 @@ static const struct v4l2_file_operations cal_fops = { static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx) { - struct v4l2_subdev_mbus_code_enum mbus_code; struct v4l2_mbus_framefmt mbus_fmt; const struct cal_format_info *fmtinfo; unsigned int i, j, k; @@ -829,10 +828,11 @@ static int cal_ctx_v4l2_init_formats(struct cal_ctx *ctx) ctx->num_active_fmt = 0; for (j = 0, i = 0; ; ++j) { + struct v4l2_subdev_mbus_code_enum mbus_code = { + .index = j, + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; - memset(&mbus_code, 0, sizeof(mbus_code)); - mbus_code.index = j; - mbus_code.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(ctx->phy->source, pad, enum_mbus_code, NULL, &mbus_code); if (ret == -EINVAL) diff --git a/drivers/media/platform/vsp1/vsp1_drm.c b/drivers/media/platform/vsp1/vsp1_drm.c index 06f74d410973..706d48601bf2 100644 --- a/drivers/media/platform/vsp1/vsp1_drm.c +++ b/drivers/media/platform/vsp1/vsp1_drm.c @@ -66,7 +66,9 @@ static int vsp1_du_insert_uif(struct vsp1_device *vsp1, struct vsp1_entity *prev, unsigned int prev_pad, struct vsp1_entity *next, unsigned int next_pad) { - struct v4l2_subdev_format format; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; int ret; if (!uif) { @@ -82,8 +84,6 @@ static int vsp1_du_insert_uif(struct vsp1_device *vsp1, prev->sink = uif; prev->sink_pad = UIF_PAD_SINK; - memset(&format, 0, sizeof(format)); - format.which = V4L2_SUBDEV_FORMAT_ACTIVE; format.pad = prev_pad; ret = v4l2_subdev_call(&prev->subdev, pad, get_fmt, NULL, &format); @@ -118,8 +118,12 @@ static int vsp1_du_pipeline_setup_rpf(struct vsp1_device *vsp1, struct vsp1_entity *uif, unsigned int brx_input) { - struct v4l2_subdev_selection sel; - struct v4l2_subdev_format format; + struct v4l2_subdev_selection sel = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + struct v4l2_subdev_format format = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; const struct v4l2_rect *crop; int ret; @@ -129,8 +133,6 @@ static int vsp1_du_pipeline_setup_rpf(struct vsp1_device *vsp1, */ crop = &vsp1->drm->inputs[rpf->entity.index].crop; - memset(&format, 0, sizeof(format)); - format.which = V4L2_SUBDEV_FORMAT_ACTIVE; format.pad = RWPF_PAD_SINK; format.format.width = crop->width + crop->left; format.format.height = crop->height + crop->top; @@ -147,8 +149,6 @@ static int vsp1_du_pipeline_setup_rpf(struct vsp1_device *vsp1, __func__, format.format.width, format.format.height, format.format.code, rpf->entity.index); - memset(&sel, 0, sizeof(sel)); - sel.which = V4L2_SUBDEV_FORMAT_ACTIVE; sel.pad = RWPF_PAD_SINK; sel.target = V4L2_SEL_TGT_CROP; sel.r = *crop; diff --git a/drivers/media/platform/vsp1/vsp1_entity.c b/drivers/media/platform/vsp1/vsp1_entity.c index 823c15facd1b..b40926270c14 100644 --- a/drivers/media/platform/vsp1/vsp1_entity.c +++ b/drivers/media/platform/vsp1/vsp1_entity.c @@ -184,15 +184,14 @@ vsp1_entity_get_pad_selection(struct vsp1_entity *entity, int vsp1_entity_init_cfg(struct v4l2_subdev *subdev, struct v4l2_subdev_state *sd_state) { - struct v4l2_subdev_format format; unsigned int pad; for (pad = 0; pad < subdev->entity.num_pads - 1; ++pad) { - memset(&format, 0, sizeof(format)); - - format.pad = pad; - format.which = sd_state ? V4L2_SUBDEV_FORMAT_TRY - : V4L2_SUBDEV_FORMAT_ACTIVE; + struct v4l2_subdev_format format = { + .pad = pad, + .which = sd_state ? V4L2_SUBDEV_FORMAT_TRY + : V4L2_SUBDEV_FORMAT_ACTIVE, + }; v4l2_subdev_call(subdev, pad, set_fmt, sd_state, &format); } diff --git a/drivers/media/usb/dvb-usb/cxusb-analog.c b/drivers/media/usb/dvb-usb/cxusb-analog.c index e93183ddd797..deba5224cb8d 100644 --- a/drivers/media/usb/dvb-usb/cxusb-analog.c +++ b/drivers/media/usb/dvb-usb/cxusb-analog.c @@ -1014,7 +1014,10 @@ static int cxusb_medion_try_s_fmt_vid_cap(struct file *file, { struct dvb_usb_device *dvbdev = video_drvdata(file); struct cxusb_medion_dev *cxdev = dvbdev->priv; - struct v4l2_subdev_format subfmt; + struct v4l2_subdev_format subfmt = { + .which = isset ? V4L2_SUBDEV_FORMAT_ACTIVE : + V4L2_SUBDEV_FORMAT_TRY, + }; u32 field; int ret; @@ -1024,9 +1027,6 @@ static int cxusb_medion_try_s_fmt_vid_cap(struct file *file, field = vb2_start_streaming_called(&cxdev->videoqueue) ? cxdev->field_order : cxusb_medion_field_order(cxdev); - memset(&subfmt, 0, sizeof(subfmt)); - subfmt.which = isset ? V4L2_SUBDEV_FORMAT_ACTIVE : - V4L2_SUBDEV_FORMAT_TRY; subfmt.format.width = f->fmt.pix.width & ~1; subfmt.format.height = f->fmt.pix.height & ~1; subfmt.format.code = MEDIA_BUS_FMT_FIXED; @@ -1464,7 +1464,9 @@ int cxusb_medion_analog_init(struct dvb_usb_device *dvbdev) .buf = tuner_analog_msg_data, .len = sizeof(tuner_analog_msg_data) }; - struct v4l2_subdev_format subfmt; + struct v4l2_subdev_format subfmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; int ret; /* switch tuner to analog mode so IF demod will become accessible */ @@ -1507,8 +1509,6 @@ int cxusb_medion_analog_init(struct dvb_usb_device *dvbdev) v4l2_subdev_call(cxdev->tuner, video, s_std, cxdev->norm); v4l2_subdev_call(cxdev->cx25840, video, s_std, cxdev->norm); - memset(&subfmt, 0, sizeof(subfmt)); - subfmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; subfmt.format.width = cxdev->width; subfmt.format.height = cxdev->height; subfmt.format.code = MEDIA_BUS_FMT_FIXED; diff --git a/drivers/staging/media/imx/imx-media-capture.c b/drivers/staging/media/imx/imx-media-capture.c index 93ba09236010..5cc67786b916 100644 --- a/drivers/staging/media/imx/imx-media-capture.c +++ b/drivers/staging/media/imx/imx-media-capture.c @@ -501,14 +501,14 @@ static int capture_legacy_g_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct capture_priv *priv = video_drvdata(file); - struct v4l2_subdev_frame_interval fi; + struct v4l2_subdev_frame_interval fi = { + .pad = priv->src_sd_pad, + }; int ret; if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; - memset(&fi, 0, sizeof(fi)); - fi.pad = priv->src_sd_pad; ret = v4l2_subdev_call(priv->src_sd, video, g_frame_interval, &fi); if (ret < 0) return ret; @@ -523,14 +523,14 @@ static int capture_legacy_s_parm(struct file *file, void *fh, struct v4l2_streamparm *a) { struct capture_priv *priv = video_drvdata(file); - struct v4l2_subdev_frame_interval fi; + struct v4l2_subdev_frame_interval fi = { + .pad = priv->src_sd_pad, + }; int ret; if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; - memset(&fi, 0, sizeof(fi)); - fi.pad = priv->src_sd_pad; fi.interval = a->parm.capture.timeperframe; ret = v4l2_subdev_call(priv->src_sd, video, s_frame_interval, &fi); if (ret < 0) diff --git a/drivers/staging/media/imx/imx-media-utils.c b/drivers/staging/media/imx/imx-media-utils.c index 6f90acf9c725..49ba521dd9ed 100644 --- a/drivers/staging/media/imx/imx-media-utils.c +++ b/drivers/staging/media/imx/imx-media-utils.c @@ -432,15 +432,15 @@ int imx_media_init_cfg(struct v4l2_subdev *sd, struct v4l2_subdev_state *sd_state) { struct v4l2_mbus_framefmt *mf_try; - struct v4l2_subdev_format format; unsigned int pad; int ret; for (pad = 0; pad < sd->entity.num_pads; pad++) { - memset(&format, 0, sizeof(format)); + struct v4l2_subdev_format format = { + .pad = pad, + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; - format.pad = pad; - format.which = V4L2_SUBDEV_FORMAT_ACTIVE; ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format); if (ret) continue; diff --git a/drivers/staging/media/omap4iss/iss_video.c b/drivers/staging/media/omap4iss/iss_video.c index d0da083deed5..801e145ea976 100644 --- a/drivers/staging/media/omap4iss/iss_video.c +++ b/drivers/staging/media/omap4iss/iss_video.c @@ -244,7 +244,9 @@ static int __iss_video_get_format(struct iss_video *video, struct v4l2_mbus_framefmt *format) { - struct v4l2_subdev_format fmt; + struct v4l2_subdev_format fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; struct v4l2_subdev *subdev; u32 pad; int ret; @@ -253,9 +255,7 @@ __iss_video_get_format(struct iss_video *video, if (!subdev) return -EINVAL; - memset(&fmt, 0, sizeof(fmt)); fmt.pad = pad; - fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; mutex_lock(&video->mutex); ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);