From: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Date: Sun, 10 Aug 2025 01:30:18 +0000 (+0300)
Subject: media: allegro: Access v4l2_fh from file
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=334f228752c2f8d3d4c74bc360527197819ddcc5;p=users%2Fhch%2Fmisc.git

media: allegro: Access v4l2_fh from file

The v4l2_fh associated with an open file handle is now guaranteed
to be available in file->private_data, initialised by v4l2_fh_add().

Access the v4l2_fh, and from there the driver-specific structure,
from the file * in all ioctl handlers.

While at it remove the only left user of fh_to_channel() and remove
the macro completely.

Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Michael Tretter <m.tretter@pengutronix.de>
Co-developed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>
---

diff --git a/drivers/media/platform/allegro-dvt/allegro-core.c b/drivers/media/platform/allegro-dvt/allegro-core.c
index 5e3b1f5d7206..510c3c9661d9 100644
--- a/drivers/media/platform/allegro-dvt/allegro-core.c
+++ b/drivers/media/platform/allegro-dvt/allegro-core.c
@@ -197,8 +197,6 @@ static const struct regmap_config allegro_sram_config = {
 	.cache_type = REGCACHE_NONE,
 };
 
-#define fh_to_channel(__fh) container_of(__fh, struct allegro_channel, fh)
-
 struct allegro_channel {
 	struct allegro_dev *dev;
 	struct v4l2_fh fh;
@@ -3284,7 +3282,7 @@ static int allegro_enum_fmt_vid(struct file *file, void *fh,
 static int allegro_g_fmt_vid_cap(struct file *file, void *fh,
 				 struct v4l2_format *f)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 
 	f->fmt.pix.field = V4L2_FIELD_NONE;
 	f->fmt.pix.width = channel->width;
@@ -3326,7 +3324,7 @@ static int allegro_try_fmt_vid_cap(struct file *file, void *fh,
 static int allegro_s_fmt_vid_cap(struct file *file, void *fh,
 				 struct v4l2_format *f)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 	struct vb2_queue *vq;
 	int err;
 
@@ -3350,7 +3348,7 @@ static int allegro_s_fmt_vid_cap(struct file *file, void *fh,
 static int allegro_g_fmt_vid_out(struct file *file, void *fh,
 				 struct v4l2_format *f)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 
 	f->fmt.pix.field = V4L2_FIELD_NONE;
 
@@ -3397,7 +3395,7 @@ static int allegro_try_fmt_vid_out(struct file *file, void *fh,
 static int allegro_s_fmt_vid_out(struct file *file, void *fh,
 				 struct v4l2_format *f)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 	int err;
 
 	err = allegro_try_fmt_vid_out(file, fh, f);
@@ -3438,7 +3436,7 @@ static int allegro_channel_cmd_start(struct allegro_channel *channel)
 static int allegro_encoder_cmd(struct file *file, void *fh,
 			       struct v4l2_encoder_cmd *cmd)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 	int err;
 
 	err = v4l2_m2m_ioctl_try_encoder_cmd(file, fh, cmd);
@@ -3487,8 +3485,7 @@ static int allegro_enum_framesizes(struct file *file, void *fh,
 static int allegro_ioctl_streamon(struct file *file, void *priv,
 				  enum v4l2_buf_type type)
 {
-	struct v4l2_fh *fh = file_to_v4l2_fh(file);
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 	int err;
 
 	if (type == V4L2_BUF_TYPE_VIDEO_CAPTURE) {
@@ -3497,13 +3494,13 @@ static int allegro_ioctl_streamon(struct file *file, void *priv,
 			return err;
 	}
 
-	return v4l2_m2m_streamon(file, fh->m2m_ctx, type);
+	return v4l2_m2m_streamon(file, channel->fh.m2m_ctx, type);
 }
 
 static int allegro_g_parm(struct file *file, void *fh,
 			  struct v4l2_streamparm *a)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 	struct v4l2_fract *timeperframe;
 
 	if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
@@ -3520,7 +3517,7 @@ static int allegro_g_parm(struct file *file, void *fh,
 static int allegro_s_parm(struct file *file, void *fh,
 			  struct v4l2_streamparm *a)
 {
-	struct allegro_channel *channel = fh_to_channel(fh);
+	struct allegro_channel *channel = file_to_channel(file);
 	struct v4l2_fract *timeperframe;
 	int div;