[media] v4l2-ioctl: handle priority handling based on a table lookup

Rather than checking the priority for each ioctl that needs to, just mark
such ioctls in the table and do it only once.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 41 insertions, 141 deletions

diff --git a/drivers/media/video/v4l2-ioctl.c b/drivers/media/video/v4l2-ioctl.c
index 3df1f80f1c5..623d280ce09 100644
--- a/drivers/media/video/v4l2-ioctl.c
+++ b/drivers/media/video/v4l2-ioctl.c
@@ -189,6 +189,8 @@ struct v4l2_ioctl_info {
 	const char * const name;
 };
 
+/* This control needs a priority check */
+#define INFO_FL_PRIO	(1 << 0)
 /* This control can be valid if the filehandle passes a control handler. */
 #define INFO_FL_CTRL	(1 << 1)
 
@@ -202,80 +204,82 @@ static struct v4l2_ioctl_info v4l2_ioctls[] = {
 	IOCTL_INFO(VIDIOC_QUERYCAP, 0),
 	IOCTL_INFO(VIDIOC_ENUM_FMT, 0),
 	IOCTL_INFO(VIDIOC_G_FMT, 0),
-	IOCTL_INFO(VIDIOC_S_FMT, 0),
-	IOCTL_INFO(VIDIOC_REQBUFS, 0),
+	IOCTL_INFO(VIDIOC_S_FMT, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_REQBUFS, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_QUERYBUF, 0),
 	IOCTL_INFO(VIDIOC_G_FBUF, 0),
-	IOCTL_INFO(VIDIOC_S_FBUF, 0),
-	IOCTL_INFO(VIDIOC_OVERLAY, 0),
+	IOCTL_INFO(VIDIOC_S_FBUF, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_OVERLAY, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_QBUF, 0),
 	IOCTL_INFO(VIDIOC_DQBUF, 0),
-	IOCTL_INFO(VIDIOC_STREAMON, 0),
-	IOCTL_INFO(VIDIOC_STREAMOFF, 0),
+	IOCTL_INFO(VIDIOC_STREAMON, INFO_FL_PRIO),
+	IOCTL_INFO(VIDIOC_STREAMOFF, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_PARM, 0),
-	IOCTL_INFO(VIDIOC_S_PARM, 0),
+	IOCTL_INFO(VIDIOC_S_PARM, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_STD, 0),
-	IOCTL_INFO(VIDIOC_S_STD, 0),
+	IOCTL_INFO(VIDIOC_S_STD, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_ENUMSTD, 0),
 	IOCTL_INFO(VIDIOC_ENUMINPUT, 0),
 	IOCTL_INFO(VIDIOC_G_CTRL, INFO_FL_CTRL),
-	IOCTL_INFO(VIDIOC_S_CTRL, INFO_FL_CTRL),
+	IOCTL_INFO(VIDIOC_S_CTRL, INFO_FL_PRIO | INFO_FL_CTRL),
 	IOCTL_INFO(VIDIOC_G_TUNER, 0),
-	IOCTL_INFO(VIDIOC_S_TUNER, 0),
+	IOCTL_INFO(VIDIOC_S_TUNER, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_AUDIO, 0),
-	IOCTL_INFO(VIDIOC_S_AUDIO, 0),
+	IOCTL_INFO(VIDIOC_S_AUDIO, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_QUERYCTRL, INFO_FL_CTRL),
 	IOCTL_INFO(VIDIOC_QUERYMENU, INFO_FL_CTRL),
 	IOCTL_INFO(VIDIOC_G_INPUT, 0),
-	IOCTL_INFO(VIDIOC_S_INPUT, 0),
+	IOCTL_INFO(VIDIOC_S_INPUT, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_OUTPUT, 0),
-	IOCTL_INFO(VIDIOC_S_OUTPUT, 0),
+	IOCTL_INFO(VIDIOC_S_OUTPUT, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_ENUMOUTPUT, 0),
 	IOCTL_INFO(VIDIOC_G_AUDOUT, 0),
-	IOCTL_INFO(VIDIOC_S_AUDOUT, 0),
+	IOCTL_INFO(VIDIOC_S_AUDOUT, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_MODULATOR, 0),
-	IOCTL_INFO(VIDIOC_S_MODULATOR, 0),
+	IOCTL_INFO(VIDIOC_S_MODULATOR, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_FREQUENCY, 0),
-	IOCTL_INFO(VIDIOC_S_FREQUENCY, 0),
+	IOCTL_INFO(VIDIOC_S_FREQUENCY, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_CROPCAP, 0),
 	IOCTL_INFO(VIDIOC_G_CROP, 0),
-	IOCTL_INFO(VIDIOC_S_CROP, 0),
+	IOCTL_INFO(VIDIOC_S_CROP, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_SELECTION, 0),
-	IOCTL_INFO(VIDIOC_S_SELECTION, 0),
+	IOCTL_INFO(VIDIOC_S_SELECTION, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_JPEGCOMP, 0),
-	IOCTL_INFO(VIDIOC_S_JPEGCOMP, 0),
+	IOCTL_INFO(VIDIOC_S_JPEGCOMP, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_QUERYSTD, 0),
 	IOCTL_INFO(VIDIOC_TRY_FMT, 0),
 	IOCTL_INFO(VIDIOC_ENUMAUDIO, 0),
 	IOCTL_INFO(VIDIOC_ENUMAUDOUT, 0),
 	IOCTL_INFO(VIDIOC_G_PRIORITY, 0),
-	IOCTL_INFO(VIDIOC_S_PRIORITY, 0),
+	IOCTL_INFO(VIDIOC_S_PRIORITY, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, 0),
 	IOCTL_INFO(VIDIOC_LOG_STATUS, 0),
 	IOCTL_INFO(VIDIOC_G_EXT_CTRLS, INFO_FL_CTRL),
-	IOCTL_INFO(VIDIOC_S_EXT_CTRLS, INFO_FL_CTRL),
+	IOCTL_INFO(VIDIOC_S_EXT_CTRLS, INFO_FL_PRIO | INFO_FL_CTRL),
 	IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, 0),
 	IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, 0),
 	IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, 0),
 	IOCTL_INFO(VIDIOC_G_ENC_INDEX, 0),
-	IOCTL_INFO(VIDIOC_ENCODER_CMD, 0),
+	IOCTL_INFO(VIDIOC_ENCODER_CMD, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, 0),
-	IOCTL_INFO(VIDIOC_DECODER_CMD, 0),
+	IOCTL_INFO(VIDIOC_DECODER_CMD, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, 0),
+#ifdef CONFIG_VIDEO_ADV_DEBUG
 	IOCTL_INFO(VIDIOC_DBG_S_REGISTER, 0),
 	IOCTL_INFO(VIDIOC_DBG_G_REGISTER, 0),
+#endif
 	IOCTL_INFO(VIDIOC_DBG_G_CHIP_IDENT, 0),
-	IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, 0),
+	IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_ENUM_DV_PRESETS, 0),
-	IOCTL_INFO(VIDIOC_S_DV_PRESET, 0),
+	IOCTL_INFO(VIDIOC_S_DV_PRESET, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_DV_PRESET, 0),
 	IOCTL_INFO(VIDIOC_QUERY_DV_PRESET, 0),
-	IOCTL_INFO(VIDIOC_S_DV_TIMINGS, 0),
+	IOCTL_INFO(VIDIOC_S_DV_TIMINGS, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_G_DV_TIMINGS, 0),
 	IOCTL_INFO(VIDIOC_DQEVENT, 0),
 	IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, 0),
 	IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, 0),
-	IOCTL_INFO(VIDIOC_CREATE_BUFS, 0),
+	IOCTL_INFO(VIDIOC_CREATE_BUFS, INFO_FL_PRIO),
 	IOCTL_INFO(VIDIOC_PREPARE_BUF, 0),
 };
 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
@@ -509,7 +513,6 @@ static long __video_do_ioctl(struct file *file,
 	void *fh = file->private_data;
 	struct v4l2_fh *vfh = NULL;
 	int use_fh_prio = 0;
-	long ret_prio = 0;
 	long ret = -ENOTTY;
 
 	if (ops == NULL) {
@@ -521,8 +524,6 @@ static long __video_do_ioctl(struct file *file,
 	if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
 		vfh = file->private_data;
 		use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
-		if (use_fh_prio)
-			ret_prio = v4l2_prio_check(vfd->prio, vfh->prio);
 	}
 
 	if (v4l2_is_known_ioctl(cmd)) {
@@ -531,6 +532,12 @@ static long __video_do_ioctl(struct file *file,
 	        if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
 		    !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
 			return -ENOTTY;
+
+		if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
+			ret = v4l2_prio_check(vfd->prio, vfh->prio);
+			if (ret)
+				return ret;
+		}
 	}
 
 	if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
@@ -579,14 +586,11 @@ static long __video_do_ioctl(struct file *file,
 	{
 		enum v4l2_priority *p = arg;
 
-		if (!ops->vidioc_s_priority && !use_fh_prio)
-			break;
 		dbgarg(cmd, "setting priority to %d\n", *p);
 		if (ops->vidioc_s_priority)
 			ret = ops->vidioc_s_priority(file, fh, *p);
 		else
-			ret = ret_prio ? ret_prio :
-				v4l2_prio_change(&vfd->v4l2_dev->prio,
+			ret = v4l2_prio_change(&vfd->v4l2_dev->prio,
 							&vfh->prio, *p);
 		break;
 	}
@@ -715,10 +719,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_format *f = (struct v4l2_format *)arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = -EINVAL;
 
 		/* FIXME: Should be one dump per type */
@@ -885,10 +885,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_requestbuffers *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = check_fmt(ops, p->type);
 		if (ret)
 			break;
@@ -946,10 +942,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		int *i = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "value=%d\n", *i);
 		ret = ops->vidioc_overlay(file, fh, *i);
 		break;
@@ -971,10 +963,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_framebuffer *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
 			p->capability, p->flags, (unsigned long)p->base);
 		v4l_print_pix_fmt(vfd, &p->fmt);
@@ -985,10 +973,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		enum v4l2_buf_type i = *(int *)arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
 		ret = ops->vidioc_streamon(file, fh, i);
 		break;
@@ -997,10 +981,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		enum v4l2_buf_type i = *(int *)arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
 		ret = ops->vidioc_streamoff(file, fh, i);
 		break;
@@ -1070,10 +1050,6 @@ static long __video_do_ioctl(struct file *file,
 
 		dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = -EINVAL;
 		norm = (*id) & vfd->tvnorms;
 		if (vfd->tvnorms && !norm)	/* Check if std is supported */
@@ -1148,10 +1124,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		unsigned int *i = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "value=%d\n", *i);
 		ret = ops->vidioc_s_input(file, fh, *i);
 		break;
@@ -1197,10 +1169,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		unsigned int *i = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "value=%d\n", *i);
 		ret = ops->vidioc_s_output(file, fh, *i);
 		break;
@@ -1270,10 +1238,6 @@ static long __video_do_ioctl(struct file *file,
 		if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
 			!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
 			break;
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 
 		dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
 
@@ -1329,10 +1293,6 @@ static long __video_do_ioctl(struct file *file,
 		if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
 				!ops->vidioc_s_ext_ctrls)
 			break;
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		v4l_print_ext_ctrls(cmd, vfd, p, 1);
 		if (vfh && vfh->ctrl_handler)
 			ret = v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
@@ -1414,10 +1374,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_audio *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
 					"mode=0x%x\n", p->index, p->name,
 					p->capability, p->mode);
@@ -1451,10 +1407,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_audioout *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "index=%d, name=%s, capability=%d, "
 					"mode=%d\n", p->index, p->name,
 					p->capability, p->mode);
@@ -1480,10 +1432,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_modulator *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "index=%d, name=%s, capability=%d, "
 				"rangelow=%d, rangehigh=%d, txsubchans=%d\n",
 				p->index, p->name, p->capability, p->rangelow,
@@ -1526,10 +1474,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_crop *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
 		dbgrect(vfd, "", &p->c);
 
@@ -1567,10 +1511,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_selection *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 
 		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
 		dbgrect(vfd, "", &p->r);
@@ -1639,10 +1579,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_jpegcompression *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
 					"COM_len=%d, jpeg_markers=%d\n",
 					p->quality, p->APPn, p->APP_len,
@@ -1664,10 +1600,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_encoder_cmd *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = ops->vidioc_encoder_cmd(file, fh, p);
 		if (!ret)
 			dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
@@ -1686,10 +1618,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_decoder_cmd *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = ops->vidioc_decoder_cmd(file, fh, p);
 		if (!ret)
 			dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
@@ -1735,10 +1663,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_streamparm *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = check_fmt(ops, p->type);
 		if (ret)
 			break;
@@ -1769,10 +1693,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_tuner *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 		dbgarg(cmd, "index=%d, name=%s, type=%d, "
@@ -1803,10 +1723,6 @@ static long __video_do_ioctl(struct file *file,
 		struct v4l2_frequency *p = arg;
 		enum v4l2_tuner_type type;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 		dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
@@ -1881,10 +1797,6 @@ static long __video_do_ioctl(struct file *file,
 		struct v4l2_hw_freq_seek *p = arg;
 		enum v4l2_tuner_type type;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
 			V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
 		dbgarg(cmd,
@@ -1978,11 +1890,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_dv_preset *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
-
 		dbgarg(cmd, "preset=%d\n", p->preset);
 		ret = ops->vidioc_s_dv_preset(file, fh, p);
 		break;
@@ -2009,11 +1916,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_dv_timings *p = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
-
 		switch (p->type) {
 		case V4L2_DV_BT_656_1120:
 			dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
@@ -2112,10 +2014,6 @@ static long __video_do_ioctl(struct file *file,
 	{
 		struct v4l2_create_buffers *create = arg;
 
-		if (ret_prio) {
-			ret = ret_prio;
-			break;
-		}
 		ret = check_fmt(ops, create->format.type);
 		if (ret)
 			break;
@@ -2141,7 +2039,9 @@ static long __video_do_ioctl(struct file *file,
 	default:
 		if (!ops->vidioc_default)
 			break;
-		ret = ops->vidioc_default(file, fh, ret_prio >= 0, cmd, arg);
+		ret = ops->vidioc_default(file, fh, use_fh_prio ?
+				v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
+				cmd, arg);
 		break;
 	} /* switch */