[media] pvrusb2: use struct v4l2_fh

By using struct v4l2_fh both the prio handling and the linked list
implementation in pvrusb2 can be removed since both are now done in
the v4l2 core if you use struct v4l2_fh.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

diff --git a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
index 91c1700..802b43b 100644 (file)
--- a/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
+++ b/drivers/media/usb/pvrusb2/pvrusb2-v4l2.c
@@ -32,6 +32,7 @@
 #include <linux/module.h>
 #include <media/v4l2-dev.h>
 #include <media/v4l2-device.h>
+#include <media/v4l2-fh.h>
 #include <media/v4l2-common.h>
 #include <media/v4l2-ioctl.h>
 
@@ -50,14 +51,11 @@ struct pvr2_v4l2_dev {
 };
 
 struct pvr2_v4l2_fh {
+       struct v4l2_fh fh;
        struct pvr2_channel channel;
        struct pvr2_v4l2_dev *pdi;
-       enum v4l2_priority prio;
        struct pvr2_ioread *rhp;
        struct file *file;
-       struct pvr2_v4l2 *vhead;
-       struct pvr2_v4l2_fh *vnext;
-       struct pvr2_v4l2_fh *vprev;
        wait_queue_head_t wait_data;
        int fw_mode_flag;
        /* Map contiguous ordinal value to input id */
@@ -67,10 +65,6 @@ struct pvr2_v4l2_fh {
 
 struct pvr2_v4l2 {
        struct pvr2_channel channel;
-       struct pvr2_v4l2_fh *vfirst;
-       struct pvr2_v4l2_fh *vlast;
-
-       struct v4l2_prio_state prio;
 
        /* streams - Note that these must be separately, individually,
         * allocated pointers.  This is because the v4l core is going to
@@ -169,23 +163,6 @@ static int pvr2_querycap(struct file *file, void *priv, struct v4l2_capability *
        return 0;
 }
 
-static int pvr2_g_priority(struct file *file, void *priv, enum v4l2_priority *p)
-{
-       struct pvr2_v4l2_fh *fh = file->private_data;
-       struct pvr2_v4l2 *vp = fh->vhead;
-
-       *p = v4l2_prio_max(&vp->prio);
-       return 0;
-}
-
-static int pvr2_s_priority(struct file *file, void *priv, enum v4l2_priority prio)
-{
-       struct pvr2_v4l2_fh *fh = file->private_data;
-       struct pvr2_v4l2 *vp = fh->vhead;
-
-       return v4l2_prio_change(&vp->prio, &fh->prio, prio);
-}
-
 static int pvr2_g_std(struct file *file, void *priv, v4l2_std_id *std)
 {
        struct pvr2_v4l2_fh *fh = file->private_data;
@@ -805,8 +782,6 @@ static int pvr2_log_status(struct file *file, void *priv)
 
 static const struct v4l2_ioctl_ops pvr2_ioctl_ops = {
        .vidioc_querycap                    = pvr2_querycap,
-       .vidioc_g_priority                  = pvr2_g_priority,
-       .vidioc_s_priority                  = pvr2_s_priority,
        .vidioc_s_audio                     = pvr2_s_audio,
        .vidioc_g_audio                     = pvr2_g_audio,
        .vidioc_enumaudio                   = pvr2_enumaudio,
@@ -911,7 +886,9 @@ static void pvr2_v4l2_internal_check(struct pvr2_channel *chp)
        if (!vp->channel.mc_head->disconnect_flag) return;
        pvr2_v4l2_dev_disassociate_parent(vp->dev_video);
        pvr2_v4l2_dev_disassociate_parent(vp->dev_radio);
-       if (vp->vfirst) return;
+       if (!list_empty(&vp->dev_video->devbase.fh_list) ||
+           !list_empty(&vp->dev_radio->devbase.fh_list))
+               return;
        pvr2_v4l2_destroy_no_lock(vp);
 }
 
@@ -921,7 +898,6 @@ static long pvr2_v4l2_ioctl(struct file *file,
 {
 
        struct pvr2_v4l2_fh *fh = file->private_data;
-       struct pvr2_v4l2 *vp = fh->vhead;
        struct pvr2_hdw *hdw = fh->channel.mc_head->hdw;
        long ret = -EINVAL;
 
@@ -934,18 +910,6 @@ static long pvr2_v4l2_ioctl(struct file *file,
                return -EFAULT;
        }
 
-       /* check priority */
-       switch (cmd) {
-       case VIDIOC_S_CTRL:
-       case VIDIOC_S_STD:
-       case VIDIOC_S_INPUT:
-       case VIDIOC_S_TUNER:
-       case VIDIOC_S_FREQUENCY:
-               ret = v4l2_prio_check(&vp->prio, fh->prio);
-               if (ret)
-                       return ret;
-       }
-
        ret = video_ioctl2(file, cmd, arg);
 
        pvr2_hdw_commit_ctl(hdw);
@@ -970,7 +934,7 @@ static long pvr2_v4l2_ioctl(struct file *file,
 static int pvr2_v4l2_release(struct file *file)
 {
        struct pvr2_v4l2_fh *fhp = file->private_data;
-       struct pvr2_v4l2 *vp = fhp->vhead;
+       struct pvr2_v4l2 *vp = fhp->pdi->v4lp;
        struct pvr2_hdw *hdw = fhp->channel.mc_head->hdw;
 
        pvr2_trace(PVR2_TRACE_OPEN_CLOSE,"pvr2_v4l2_release");
@@ -984,22 +948,10 @@ static int pvr2_v4l2_release(struct file *file)
                fhp->rhp = NULL;
        }
 
-       v4l2_prio_close(&vp->prio, fhp->prio);
+       v4l2_fh_del(&fhp->fh);
+       v4l2_fh_exit(&fhp->fh);
        file->private_data = NULL;
 
-       if (fhp->vnext) {
-               fhp->vnext->vprev = fhp->vprev;
-       } else {
-               vp->vlast = fhp->vprev;
-       }
-       if (fhp->vprev) {
-               fhp->vprev->vnext = fhp->vnext;
-       } else {
-               vp->vfirst = fhp->vnext;
-       }
-       fhp->vnext = NULL;
-       fhp->vprev = NULL;
-       fhp->vhead = NULL;
        pvr2_channel_done(&fhp->channel);
        pvr2_trace(PVR2_TRACE_STRUCT,
                   "Destroying pvr_v4l2_fh id=%p",fhp);
@@ -1008,7 +960,9 @@ static int pvr2_v4l2_release(struct file *file)
                fhp->input_map = NULL;
        }
        kfree(fhp);
-       if (vp->channel.mc_head->disconnect_flag && !vp->vfirst) {
+       if (vp->channel.mc_head->disconnect_flag &&
+           list_empty(&vp->dev_video->devbase.fh_list) &&
+           list_empty(&vp->dev_radio->devbase.fh_list)) {
                pvr2_v4l2_destroy_no_lock(vp);
        }
        return 0;
@@ -1043,6 +997,7 @@ static int pvr2_v4l2_open(struct file *file)
                return -ENOMEM;
        }
 
+       v4l2_fh_init(&fhp->fh, &dip->devbase);
        init_waitqueue_head(&fhp->wait_data);
        fhp->pdi = dip;
 
@@ -1093,21 +1048,11 @@ static int pvr2_v4l2_open(struct file *file)
                fhp->input_map[input_cnt++] = idx;
        }
 
-       fhp->vnext = NULL;
-       fhp->vprev = vp->vlast;
-       if (vp->vlast) {
-               vp->vlast->vnext = fhp;
-       } else {
-               vp->vfirst = fhp;
-       }
-       vp->vlast = fhp;
-       fhp->vhead = vp;
-
        fhp->file = file;
        file->private_data = fhp;
-       v4l2_prio_open(&vp->prio, &fhp->prio);
 
        fhp->fw_mode_flag = pvr2_hdw_cpufw_get_enabled(hdw);
+       v4l2_fh_add(&fhp->fh);
 
        return 0;
 }