forked from Minki/linux
[media] cx231xx: use core-assisted lock
Instead of doing its own lock, use core-assisted one. As a bonus, it will do the proper unlock during queue wait events. This fixes a long-standing bug where softwares like tvtime would hang if you try to use cx231xx-alsa. Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Mauro Carvalho Chehab
parent
0f86158375
commit
643800d5c8
@ -1019,8 +1019,6 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
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struct cx231xx_fh *fh = priv;
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struct cx231xx *dev = fh->dev;
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mutex_lock(&dev->lock);
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f->fmt.pix.width = dev->width;
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f->fmt.pix.height = dev->height;
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f->fmt.pix.pixelformat = dev->format->fourcc;
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@ -1030,8 +1028,6 @@ static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
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f->fmt.pix.field = V4L2_FIELD_INTERLACED;
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -1092,26 +1088,20 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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vidioc_try_fmt_vid_cap(file, priv, f);
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fmt = format_by_fourcc(f->fmt.pix.pixelformat);
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if (!fmt) {
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rc = -EINVAL;
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goto out;
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}
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if (!fmt)
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return -EINVAL;
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if (videobuf_queue_is_busy(&fh->vb_vidq)) {
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cx231xx_errdev("%s queue busy\n", __func__);
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rc = -EBUSY;
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goto out;
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return -EBUSY;
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}
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if (dev->stream_on && !fh->stream_on) {
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cx231xx_errdev("%s device in use by another fh\n", __func__);
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rc = -EBUSY;
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goto out;
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return -EBUSY;
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}
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/* set new image size */
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@ -1123,8 +1113,6 @@ static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
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call_all(dev, video, s_mbus_fmt, &mbus_fmt);
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v4l2_fill_pix_format(&f->fmt.pix, &mbus_fmt);
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out:
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mutex_unlock(&dev->lock);
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return rc;
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}
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@ -1151,7 +1139,6 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
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cx231xx_info("vidioc_s_std : 0x%x\n", (unsigned int)*norm);
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mutex_lock(&dev->lock);
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dev->norm = *norm;
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/* Adjusts width/height, if needed */
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@ -1172,8 +1159,6 @@ static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *norm)
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dev->width = f.fmt.pix.width;
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dev->height = f.fmt.pix.height;
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mutex_unlock(&dev->lock);
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/* do mode control overrides */
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cx231xx_do_mode_ctrl_overrides(dev);
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@ -1242,8 +1227,6 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
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if (0 == INPUT(i)->type)
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return -EINVAL;
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mutex_lock(&dev->lock);
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video_mux(dev, i);
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if (INPUT(i)->type == CX231XX_VMUX_TELEVISION ||
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@ -1254,7 +1237,6 @@ static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
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call_all(dev, core, s_std, dev->norm);
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}
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -1330,9 +1312,7 @@ static int vidioc_queryctrl(struct file *file, void *priv,
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}
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*qc = cx231xx_ctls[i].v;
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mutex_lock(&dev->lock);
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call_all(dev, core, queryctrl, qc);
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mutex_unlock(&dev->lock);
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if (qc->type)
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return 0;
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@ -1351,9 +1331,7 @@ static int vidioc_g_ctrl(struct file *file, void *priv,
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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call_all(dev, core, g_ctrl, ctrl);
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mutex_unlock(&dev->lock);
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return rc;
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}
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@ -1368,9 +1346,7 @@ static int vidioc_s_ctrl(struct file *file, void *priv,
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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call_all(dev, core, s_ctrl, ctrl);
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mutex_unlock(&dev->lock);
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return rc;
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}
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@ -1410,9 +1386,7 @@ static int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
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if (0 != t->index)
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return -EINVAL;
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#if 0
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mutex_lock(&dev->lock);
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call_all(dev, tuner, s_tuner, t);
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mutex_unlock(&dev->lock);
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#endif
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return 0;
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}
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@ -1423,14 +1397,11 @@ static int vidioc_g_frequency(struct file *file, void *priv,
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struct cx231xx_fh *fh = priv;
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struct cx231xx *dev = fh->dev;
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mutex_lock(&dev->lock);
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f->type = fh->radio ? V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
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f->frequency = dev->ctl_freq;
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call_all(dev, tuner, g_frequency, f);
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -1461,13 +1432,9 @@ static int vidioc_s_frequency(struct file *file, void *priv,
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/* set pre channel change settings in DIF first */
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rc = cx231xx_tuner_pre_channel_change(dev);
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mutex_lock(&dev->lock);
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dev->ctl_freq = f->frequency;
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call_all(dev, tuner, s_frequency, f);
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mutex_unlock(&dev->lock);
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/* set post channel change settings in DIF first */
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rc = cx231xx_tuner_post_channel_change(dev);
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@ -1655,9 +1622,7 @@ static int vidioc_g_register(struct file *file, void *priv,
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return -EINVAL;
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}
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mutex_lock(&dev->lock);
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call_all(dev, core, g_register, reg);
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mutex_unlock(&dev->lock);
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return ret;
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}
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@ -1822,9 +1787,7 @@ static int vidioc_s_register(struct file *file, void *priv,
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break;
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}
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mutex_lock(&dev->lock);
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call_all(dev, core, s_register, reg);
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mutex_unlock(&dev->lock);
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return ret;
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}
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@ -1861,7 +1824,6 @@ static int vidioc_streamon(struct file *file, void *priv,
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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rc = res_get(fh);
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if (likely(rc >= 0))
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@ -1869,8 +1831,6 @@ static int vidioc_streamon(struct file *file, void *priv,
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call_all(dev, video, s_stream, 1);
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mutex_unlock(&dev->lock);
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return rc;
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}
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@ -1891,15 +1851,11 @@ static int vidioc_streamoff(struct file *file, void *priv,
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if (type != fh->type)
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return -EINVAL;
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mutex_lock(&dev->lock);
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cx25840_call(dev, video, s_stream, 0);
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videobuf_streamoff(&fh->vb_vidq);
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res_free(fh);
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -1954,8 +1910,6 @@ static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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f->fmt.sliced.service_set = 0;
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call_all(dev, vbi, g_sliced_fmt, &f->fmt.sliced);
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@ -1963,7 +1917,6 @@ static int vidioc_g_fmt_sliced_vbi_cap(struct file *file, void *priv,
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if (f->fmt.sliced.service_set == 0)
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rc = -EINVAL;
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mutex_unlock(&dev->lock);
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return rc;
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}
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@ -1978,9 +1931,7 @@ static int vidioc_try_set_sliced_vbi_cap(struct file *file, void *priv,
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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call_all(dev, vbi, g_sliced_fmt, &f->fmt.sliced);
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mutex_unlock(&dev->lock);
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if (f->fmt.sliced.service_set == 0)
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return -EINVAL;
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@ -2130,9 +2081,7 @@ static int radio_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
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strcpy(t->name, "Radio");
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t->type = V4L2_TUNER_RADIO;
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mutex_lock(&dev->lock);
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call_all(dev, tuner, s_tuner, t);
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -2163,9 +2112,7 @@ static int radio_s_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
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if (0 != t->index)
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return -EINVAL;
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mutex_lock(&dev->lock);
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call_all(dev, tuner, s_tuner, t);
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -2224,8 +2171,6 @@ static int cx231xx_v4l2_open(struct file *filp)
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break;
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}
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mutex_lock(&dev->lock);
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cx231xx_videodbg("open dev=%s type=%s users=%d\n",
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video_device_node_name(vdev), v4l2_type_names[fh_type],
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dev->users);
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@ -2235,7 +2180,6 @@ static int cx231xx_v4l2_open(struct file *filp)
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if (errCode < 0) {
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cx231xx_errdev
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("Device locked on digital mode. Can't open analog\n");
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mutex_unlock(&dev->lock);
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return -EBUSY;
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}
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#endif
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@ -2243,7 +2187,6 @@ static int cx231xx_v4l2_open(struct file *filp)
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fh = kzalloc(sizeof(struct cx231xx_fh), GFP_KERNEL);
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if (!fh) {
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cx231xx_errdev("cx231xx-video.c: Out of memory?!\n");
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mutex_unlock(&dev->lock);
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return -ENOMEM;
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}
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fh->dev = dev;
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@ -2293,7 +2236,7 @@ static int cx231xx_v4l2_open(struct file *filp)
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NULL, &dev->video_mode.slock,
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fh->type, V4L2_FIELD_INTERLACED,
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sizeof(struct cx231xx_buffer),
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fh, NULL);
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fh, &dev->lock);
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if (fh->type == V4L2_BUF_TYPE_VBI_CAPTURE) {
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/* Set the required alternate setting VBI interface works in
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Bulk mode only */
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@ -2305,11 +2248,9 @@ static int cx231xx_v4l2_open(struct file *filp)
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NULL, &dev->vbi_mode.slock,
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fh->type, V4L2_FIELD_SEQ_TB,
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sizeof(struct cx231xx_buffer),
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fh, NULL);
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fh, &dev->lock);
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}
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mutex_unlock(&dev->lock);
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return errCode;
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}
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@ -2366,7 +2307,6 @@ static int cx231xx_v4l2_close(struct file *filp)
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cx231xx_videodbg("users=%d\n", dev->users);
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mutex_lock(&dev->lock);
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cx231xx_videodbg("users=%d\n", dev->users);
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if (res_check(fh))
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res_free(fh);
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@ -2384,12 +2324,10 @@ static int cx231xx_v4l2_close(struct file *filp)
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if (dev->state & DEV_DISCONNECTED) {
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if (atomic_read(&dev->devlist_count) > 0) {
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cx231xx_release_resources(dev);
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mutex_unlock(&dev->lock);
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kfree(dev);
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dev = NULL;
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return 0;
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}
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -2405,7 +2343,6 @@ static int cx231xx_v4l2_close(struct file *filp)
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kfree(fh);
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dev->users--;
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wake_up_interruptible_nr(&dev->open, 1);
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -2417,7 +2354,6 @@ static int cx231xx_v4l2_close(struct file *filp)
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free the remaining resources */
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if (dev->state & DEV_DISCONNECTED) {
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cx231xx_release_resources(dev);
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mutex_unlock(&dev->lock);
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kfree(dev);
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dev = NULL;
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return 0;
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@ -2439,7 +2375,6 @@ static int cx231xx_v4l2_close(struct file *filp)
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kfree(fh);
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dev->users--;
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wake_up_interruptible_nr(&dev->open, 1);
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mutex_unlock(&dev->lock);
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return 0;
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}
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@ -2461,9 +2396,7 @@ cx231xx_v4l2_read(struct file *filp, char __user *buf, size_t count,
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if ((fh->type == V4L2_BUF_TYPE_VIDEO_CAPTURE) ||
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(fh->type == V4L2_BUF_TYPE_VBI_CAPTURE)) {
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mutex_lock(&dev->lock);
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rc = res_get(fh);
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mutex_unlock(&dev->lock);
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if (unlikely(rc < 0))
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return rc;
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@ -2488,9 +2421,7 @@ static unsigned int cx231xx_v4l2_poll(struct file *filp, poll_table *wait)
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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rc = res_get(fh);
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mutex_unlock(&dev->lock);
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if (unlikely(rc < 0))
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return POLLERR;
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@ -2515,9 +2446,7 @@ static int cx231xx_v4l2_mmap(struct file *filp, struct vm_area_struct *vma)
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if (rc < 0)
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return rc;
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mutex_lock(&dev->lock);
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rc = res_get(fh);
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mutex_unlock(&dev->lock);
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if (unlikely(rc < 0))
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return rc;
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@ -2539,7 +2468,7 @@ static const struct v4l2_file_operations cx231xx_v4l_fops = {
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.read = cx231xx_v4l2_read,
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.poll = cx231xx_v4l2_poll,
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.mmap = cx231xx_v4l2_mmap,
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.ioctl = video_ioctl2,
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.unlocked_ioctl = video_ioctl2,
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};
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static const struct v4l2_ioctl_ops video_ioctl_ops = {
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@ -2641,6 +2570,7 @@ static struct video_device *cx231xx_vdev_init(struct cx231xx *dev,
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vfd->v4l2_dev = &dev->v4l2_dev;
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vfd->release = video_device_release;
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vfd->debug = video_debug;
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vfd->lock = &dev->lock;
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snprintf(vfd->name, sizeof(vfd->name), "%s %s", dev->name, type_name);
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