media: Prefer designated initializers over memset for subdev pad ops

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 <laurent.pinchart@ideasonboard.com>
Reviewed-by: Lad Prabhakar <prabhakar.csengg@gmail.com> # For am437x
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

1 files changed, 4 insertions, 3 deletions

diff --git a/drivers/media/platform/samsung/exynos4-is/fimc-capture.c b/drivers/media/platform/samsung/exynos4-is/fimc-capture.c
index 4800751a401c..a0d43bf892e6 100644
--- a/drivers/media/platform/samsung/exynos4-is/fimc-capture.c
+++ b/drivers/media/platform/samsung/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);