[media] cx18: use v4l2_fh as preparation for adding core priority support

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

3 files changed, 61 insertions, 41 deletions

diff --git a/drivers/media/video/cx18/cx18-driver.h b/drivers/media/video/cx18/cx18-driver.h
index de2457741e26..30a857473e54 100644
--- a/drivers/media/video/cx18/cx18-driver.h
+++ b/drivers/media/video/cx18/cx18-driver.h
@@ -50,6 +50,7 @@
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
 #include <media/tuner.h>
 #include <media/ir-kbd-i2c.h>
 #include "cx18-mailbox.h"
@@ -405,12 +406,23 @@ struct cx18_stream {
 };
 
 struct cx18_open_id {
+        struct v4l2_fh fh;
         u32 open_id;
         int type;
         enum v4l2_priority prio;
         struct cx18 *cx;
 };
 
+static inline struct cx18_open_id *fh2id(struct v4l2_fh *fh)
+{
+        return container_of(fh, struct cx18_open_id, fh);
+}
+
+static inline struct cx18_open_id *file2id(struct file *file)
+{
+        return fh2id(file->private_data);
+}
+
 /* forward declaration of struct defined in cx18-cards.h */
 struct cx18_card;
 
diff --git a/drivers/media/video/cx18/cx18-fileops.c b/drivers/media/video/cx18/cx18-fileops.c
index 98ef33e4326a..1172d68925c0 100644
--- a/drivers/media/video/cx18/cx18-fileops.c
+++ b/drivers/media/video/cx18/cx18-fileops.c
@@ -585,7 +585,7 @@ start_failed:
 ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count,
                 loff_t *pos)
 {
-        struct cx18_open_id *id = filp->private_data;
+        struct cx18_open_id *id = file2id(filp);
         struct cx18 *cx = id->cx;
         struct cx18_stream *s = &cx->streams[id->type];
         int rc;
@@ -602,7 +602,7 @@ ssize_t cx18_v4l2_read(struct file *filp, char __user *buf, size_t count,
 
 unsigned int cx18_v4l2_enc_poll(struct file *filp, poll_table *wait)
 {
-        struct cx18_open_id *id = filp->private_data;
+        struct cx18_open_id *id = file2id(filp);
         struct cx18 *cx = id->cx;
         struct cx18_stream *s = &cx->streams[id->type];
         int eof = test_bit(CX18_F_S_STREAMOFF, &s->s_flags);
@@ -676,13 +676,16 @@ void cx18_stop_capture(struct cx18_open_id *id, int gop_end)
 
 int cx18_v4l2_close(struct file *filp)
 {
-        struct cx18_open_id *id = filp->private_data;
+        struct v4l2_fh *fh = filp->private_data;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         struct cx18_stream *s = &cx->streams[id->type];
 
         CX18_DEBUG_IOCTL("close() of %s\n", s->name);
 
         v4l2_prio_close(&cx->prio, id->prio);
+        v4l2_fh_del(fh);
+        v4l2_fh_exit(fh);
 
         /* Easy case first: this stream was never claimed by us */
         if (s->id != id->open_id) {
@@ -728,22 +731,25 @@ static int cx18_serialized_open(struct cx18_stream *s, struct file *filp)
         CX18_DEBUG_FILE("open %s\n", s->name);
 
         /* Allocate memory */
-        item = kmalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
+        item = kzalloc(sizeof(struct cx18_open_id), GFP_KERNEL);
         if (NULL == item) {
                 CX18_DEBUG_WARN("nomem on v4l2 open\n");
                 return -ENOMEM;
         }
+        v4l2_fh_init(&item->fh, s->video_dev);
+
         item->cx = cx;
         item->type = s->type;
         v4l2_prio_open(&cx->prio, &item->prio);
 
         item->open_id = cx->open_id++;
-        filp->private_data = item;
+        filp->private_data = &item->fh;
 
         if (item->type == CX18_ENC_STREAM_TYPE_RAD) {
                 /* Try to claim this stream */
                 if (cx18_claim_stream(item, item->type)) {
                         /* No, it's already in use */
+                        v4l2_fh_exit(&item->fh);
                         kfree(item);
                         return -EBUSY;
                 }
@@ -753,6 +759,7 @@ static int cx18_serialized_open(struct cx18_stream *s, struct file *filp)
                                 /* switching to radio while capture is
                                    in progress is not polite */
                                 cx18_release_stream(s);
+                                v4l2_fh_exit(&item->fh);
                                 kfree(item);
                                 return -EBUSY;
                         }
@@ -769,6 +776,7 @@ static int cx18_serialized_open(struct cx18_stream *s, struct file *filp)
                 /* Done! Unmute and continue. */
                 cx18_unmute(cx);
         }
+        v4l2_fh_add(&item->fh);
         return 0;
 }
 
diff --git a/drivers/media/video/cx18/cx18-ioctl.c b/drivers/media/video/cx18/cx18-ioctl.c
index 08ed75de1912..6624ec2419d3 100644
--- a/drivers/media/video/cx18/cx18-ioctl.c
+++ b/drivers/media/video/cx18/cx18-ioctl.c
@@ -148,7 +148,7 @@ u16 cx18_get_service_set(struct v4l2_sliced_vbi_format *fmt)
 static int cx18_g_fmt_vid_cap(struct file *file, void *fh,
                                 struct v4l2_format *fmt)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         struct v4l2_pix_format *pixfmt = &fmt->fmt.pix;
 
@@ -173,7 +173,7 @@ static int cx18_g_fmt_vid_cap(struct file *file, void *fh,
 static int cx18_g_fmt_vbi_cap(struct file *file, void *fh,
                                 struct v4l2_format *fmt)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         struct v4l2_vbi_format *vbifmt = &fmt->fmt.vbi;
 
         vbifmt->sampling_rate = 27000000;
@@ -192,7 +192,7 @@ static int cx18_g_fmt_vbi_cap(struct file *file, void *fh,
 static int cx18_g_fmt_sliced_vbi_cap(struct file *file, void *fh,
                                         struct v4l2_format *fmt)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;
 
         /* sane, V4L2 spec compliant, defaults */
@@ -221,7 +221,7 @@ static int cx18_g_fmt_sliced_vbi_cap(struct file *file, void *fh,
 static int cx18_try_fmt_vid_cap(struct file *file, void *fh,
                                 struct v4l2_format *fmt)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int w = fmt->fmt.pix.width;
         int h = fmt->fmt.pix.height;
@@ -252,7 +252,7 @@ static int cx18_try_fmt_vbi_cap(struct file *file, void *fh,
 static int cx18_try_fmt_sliced_vbi_cap(struct file *file, void *fh,
                                         struct v4l2_format *fmt)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;
 
         vbifmt->io_size = sizeof(struct v4l2_sliced_vbi_data) * 36;
@@ -271,7 +271,7 @@ static int cx18_try_fmt_sliced_vbi_cap(struct file *file, void *fh,
 static int cx18_s_fmt_vid_cap(struct file *file, void *fh,
                                 struct v4l2_format *fmt)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         struct v4l2_mbus_framefmt mbus_fmt;
         int ret;
@@ -303,7 +303,7 @@ static int cx18_s_fmt_vid_cap(struct file *file, void *fh,
 static int cx18_s_fmt_vbi_cap(struct file *file, void *fh,
                                 struct v4l2_format *fmt)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
 
@@ -337,7 +337,7 @@ static int cx18_s_fmt_vbi_cap(struct file *file, void *fh,
 static int cx18_s_fmt_sliced_vbi_cap(struct file *file, void *fh,
                                         struct v4l2_format *fmt)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
         struct v4l2_sliced_vbi_format *vbifmt = &fmt->fmt.sliced;
@@ -372,7 +372,7 @@ static int cx18_s_fmt_sliced_vbi_cap(struct file *file, void *fh,
 static int cx18_g_chip_ident(struct file *file, void *fh,
                                 struct v4l2_dbg_chip_ident *chip)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         int err = 0;
 
         chip->ident = V4L2_IDENT_NONE;
@@ -442,7 +442,7 @@ static int cx18_cxc(struct cx18 *cx, unsigned int cmd, void *arg)
 static int cx18_g_register(struct file *file, void *fh,
                                 struct v4l2_dbg_register *reg)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (v4l2_chip_match_host(&reg->match))
                 return cx18_cxc(cx, VIDIOC_DBG_G_REGISTER, reg);
@@ -454,7 +454,7 @@ static int cx18_g_register(struct file *file, void *fh,
 static int cx18_s_register(struct file *file, void *fh,
                                 struct v4l2_dbg_register *reg)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (v4l2_chip_match_host(&reg->match))
                 return cx18_cxc(cx, VIDIOC_DBG_S_REGISTER, reg);
@@ -466,7 +466,7 @@ static int cx18_s_register(struct file *file, void *fh,
 
 static int cx18_g_priority(struct file *file, void *fh, enum v4l2_priority *p)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = file2id(file)->cx;
 
         *p = v4l2_prio_max(&cx->prio);
         return 0;
@@ -474,7 +474,7 @@ static int cx18_g_priority(struct file *file, void *fh, enum v4l2_priority *p)
 
 static int cx18_s_priority(struct file *file, void *fh, enum v4l2_priority prio)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = file2id(file);
         struct cx18 *cx = id->cx;
 
         return v4l2_prio_change(&cx->prio, &id->prio, prio);
@@ -483,7 +483,7 @@ static int cx18_s_priority(struct file *file, void *fh, enum v4l2_priority prio)
 static int cx18_querycap(struct file *file, void *fh,
                                 struct v4l2_capability *vcap)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         strlcpy(vcap->driver, CX18_DRIVER_NAME, sizeof(vcap->driver));
         strlcpy(vcap->card, cx->card_name, sizeof(vcap->card));
@@ -496,14 +496,14 @@ static int cx18_querycap(struct file *file, void *fh,
 
 static int cx18_enumaudio(struct file *file, void *fh, struct v4l2_audio *vin)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         return cx18_get_audio_input(cx, vin->index, vin);
 }
 
 static int cx18_g_audio(struct file *file, void *fh, struct v4l2_audio *vin)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         vin->index = cx->audio_input;
         return cx18_get_audio_input(cx, vin->index, vin);
@@ -511,7 +511,7 @@ static int cx18_g_audio(struct file *file, void *fh, struct v4l2_audio *vin)
 
 static int cx18_s_audio(struct file *file, void *fh, struct v4l2_audio *vout)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (vout->index >= cx->nof_audio_inputs)
                 return -EINVAL;
@@ -522,7 +522,7 @@ static int cx18_s_audio(struct file *file, void *fh, struct v4l2_audio *vout)
 
 static int cx18_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         /* set it to defaults from our table */
         return cx18_get_input(cx, vin->index, vin);
@@ -531,7 +531,7 @@ static int cx18_enum_input(struct file *file, void *fh, struct v4l2_input *vin)
 static int cx18_cropcap(struct file *file, void *fh,
                         struct v4l2_cropcap *cropcap)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (cropcap->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                 return -EINVAL;
@@ -546,7 +546,7 @@ static int cx18_cropcap(struct file *file, void *fh,
 
 static int cx18_s_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
 
@@ -562,7 +562,7 @@ static int cx18_s_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 
 static int cx18_g_crop(struct file *file, void *fh, struct v4l2_crop *crop)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (crop->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
                 return -EINVAL;
@@ -590,7 +590,7 @@ static int cx18_enum_fmt_vid_cap(struct file *file, void *fh,
 
 static int cx18_g_input(struct file *file, void *fh, unsigned int *i)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         *i = cx->active_input;
         return 0;
@@ -598,7 +598,7 @@ static int cx18_g_input(struct file *file, void *fh, unsigned int *i)
 
 int cx18_s_input(struct file *file, void *fh, unsigned int inp)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
 
@@ -633,7 +633,7 @@ int cx18_s_input(struct file *file, void *fh, unsigned int inp)
 static int cx18_g_frequency(struct file *file, void *fh,
                                 struct v4l2_frequency *vf)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (vf->tuner != 0)
                 return -EINVAL;
@@ -644,7 +644,7 @@ static int cx18_g_frequency(struct file *file, void *fh,
 
 int cx18_s_frequency(struct file *file, void *fh, struct v4l2_frequency *vf)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
 
@@ -664,7 +664,7 @@ int cx18_s_frequency(struct file *file, void *fh, struct v4l2_frequency *vf)
 
 static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         *std = cx->std;
         return 0;
@@ -672,7 +672,7 @@ static int cx18_g_std(struct file *file, void *fh, v4l2_std_id *std)
 
 int cx18_s_std(struct file *file, void *fh, v4l2_std_id *std)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
 
@@ -713,7 +713,7 @@ int cx18_s_std(struct file *file, void *fh, v4l2_std_id *std)
 
 static int cx18_s_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         int ret;
 
@@ -730,7 +730,7 @@ static int cx18_s_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
 
 static int cx18_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         if (vt->index != 0)
                 return -EINVAL;
@@ -751,7 +751,7 @@ static int cx18_g_tuner(struct file *file, void *fh, struct v4l2_tuner *vt)
 static int cx18_g_sliced_vbi_cap(struct file *file, void *fh,
                                         struct v4l2_sliced_vbi_cap *cap)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         int set = cx->is_50hz ? V4L2_SLICED_VBI_625 : V4L2_SLICED_VBI_525;
         int f, l;
 
@@ -872,7 +872,7 @@ static int cx18_process_idx_data(struct cx18_stream *s, struct cx18_mdl *mdl,
 static int cx18_g_enc_index(struct file *file, void *fh,
                                 struct v4l2_enc_idx *idx)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         struct cx18_stream *s = &cx->streams[CX18_ENC_STREAM_TYPE_IDX];
         s32 tmp;
         struct cx18_mdl *mdl;
@@ -919,7 +919,7 @@ static int cx18_g_enc_index(struct file *file, void *fh,
 static int cx18_encoder_cmd(struct file *file, void *fh,
                                 struct v4l2_encoder_cmd *enc)
 {
-        struct cx18_open_id *id = fh;
+        struct cx18_open_id *id = fh2id(fh);
         struct cx18 *cx = id->cx;
         u32 h;
 
@@ -980,7 +980,7 @@ static int cx18_encoder_cmd(struct file *file, void *fh,
 static int cx18_try_encoder_cmd(struct file *file, void *fh,
                                 struct v4l2_encoder_cmd *enc)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         switch (enc->cmd) {
         case V4L2_ENC_CMD_START:
@@ -1012,7 +1012,7 @@ static int cx18_try_encoder_cmd(struct file *file, void *fh,
 
 static int cx18_log_status(struct file *file, void *fh)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
         struct v4l2_input vidin;
         struct v4l2_audio audin;
         int i;
@@ -1060,7 +1060,7 @@ static int cx18_log_status(struct file *file, void *fh)
 static long cx18_default(struct file *file, void *fh, bool valid_prio,
                                                         int cmd, void *arg)
 {
-        struct cx18 *cx = ((struct cx18_open_id *)fh)->cx;
+        struct cx18 *cx = fh2id(fh)->cx;
 
         switch (cmd) {
         case VIDIOC_INT_RESET: {
@@ -1082,7 +1082,7 @@ long cx18_v4l2_ioctl(struct file *filp, unsigned int cmd,
                     unsigned long arg)
 {
         struct video_device *vfd = video_devdata(filp);
-        struct cx18_open_id *id = filp->private_data;
+        struct cx18_open_id *id = file2id(filp);
         struct cx18 *cx = id->cx;
         long res;