V4L/DVB (8154): Fix protection problems in the main driver.
- Protect format change when streaming active. - Protect USB exchanges on close. - Set a timeout in frame wait. - Have only one capture file and free the resources when closing this file. - Simplify the URB buffer. - Don't reset the control values at open time in pac207. - Fix compilation warnings of stk014. Signed-off-by: Jean-Francois Moine <moinejf@free.fr> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Jean-Francois Moine
Mauro Carvalho Chehab
parent
e2997a72dd
commit
4aa0d037a6
4 changed files with 113 additions and 84 deletions
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@ -39,8 +39,8 @@ MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
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MODULE_DESCRIPTION("GSPCA USB Camera Driver");
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MODULE_LICENSE("GPL");
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#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 30)
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static const char version[] = "0.0.30";
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#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 1)
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static const char version[] = "0.1.1";
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static int video_nr = -1;
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@ -346,22 +346,17 @@ static int gspca_kill_transfer(struct gspca_dev *gspca_dev)
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PDEBUG(D_STREAM, "kill transfer");
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for (i = 0; i < NURBS; ++i) {
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urb = gspca_dev->pktbuf[i].urb;
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urb = gspca_dev->urb[i];
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if (urb == NULL)
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continue;
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gspca_dev->pktbuf[i].urb = NULL;
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gspca_dev->urb[i] = NULL;
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usb_kill_urb(urb);
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/* urb->transfer_buffer_length is not touched by USB core,
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* so we can use it here as the buffer length */
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if (gspca_dev->pktbuf[i].data) {
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if (urb->transfer_buffer != 0)
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usb_buffer_free(gspca_dev->dev,
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urb->transfer_buffer_length,
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gspca_dev->pktbuf[i].data,
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urb->transfer_buffer,
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urb->transfer_dma);
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gspca_dev->pktbuf[i].data = NULL;
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}
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usb_free_urb(urb);
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}
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return 0;
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@ -460,25 +455,25 @@ static int create_urbs(struct gspca_dev *gspca_dev,
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err("usb_alloc_urb failed");
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return -ENOMEM;
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}
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gspca_dev->pktbuf[n].data = usb_buffer_alloc(gspca_dev->dev,
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urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev,
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bsize,
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GFP_KERNEL,
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&urb->transfer_dma);
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if (gspca_dev->pktbuf[n].data == NULL) {
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if (urb->transfer_buffer == NULL) {
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usb_free_urb(urb);
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gspca_kill_transfer(gspca_dev);
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err("usb_buffer_urb failed");
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return -ENOMEM;
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}
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gspca_dev->pktbuf[n].urb = urb;
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gspca_dev->urb[n] = urb;
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urb->dev = gspca_dev->dev;
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urb->context = gspca_dev;
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urb->pipe = usb_rcvisocpipe(gspca_dev->dev,
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ep->desc.bEndpointAddress);
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urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP;
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urb->transfer_flags = URB_ISO_ASAP
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| URB_NO_TRANSFER_DMA_MAP;
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urb->interval = ep->desc.bInterval;
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urb->transfer_buffer = gspca_dev->pktbuf[n].data;
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urb->complete = isoc_irq;
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urb->number_of_packets = npkt;
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urb->transfer_buffer_length = bsize;
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@ -523,8 +518,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev)
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/* submit the URBs */
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for (n = 0; n < NURBS; n++) {
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ret = usb_submit_urb(gspca_dev->pktbuf[n].urb,
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GFP_KERNEL);
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ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL);
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if (ret < 0) {
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PDEBUG(D_ERR|D_STREAM,
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"usb_submit_urb [%d] err %d", n, ret);
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@ -732,15 +726,13 @@ static int vidioc_g_fmt_cap(struct file *file, void *priv,
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return 0;
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}
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static int try_fmt_cap(struct file *file,
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void *priv,
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static int try_fmt_cap(struct gspca_dev *gspca_dev,
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struct v4l2_format *fmt)
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{
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struct gspca_dev *gspca_dev = priv;
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int w, h, mode, mode2, frsz;
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w = (int) fmt->fmt.pix.width;
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h = (int) fmt->fmt.pix.height;
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w = fmt->fmt.pix.width;
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h = fmt->fmt.pix.height;
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#ifdef GSPCA_DEBUG
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if (gspca_debug & D_CONF)
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PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h);
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@ -786,9 +778,10 @@ static int vidioc_try_fmt_cap(struct file *file,
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void *priv,
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struct v4l2_format *fmt)
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{
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struct gspca_dev *gspca_dev = priv;
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int ret;
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ret = try_fmt_cap(file, priv, fmt);
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ret = try_fmt_cap(gspca_dev, fmt);
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if (ret < 0)
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return ret;
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return 0;
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@ -809,14 +802,19 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv,
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#endif
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if (mutex_lock_interruptible(&gspca_dev->queue_lock))
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return -ERESTARTSYS;
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ret = try_fmt_cap(file, priv, fmt);
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ret = try_fmt_cap(gspca_dev, fmt);
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if (ret < 0)
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goto out;
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if (ret == gspca_dev->curr_mode)
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goto out; /* same mode */
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was_streaming = gspca_dev->streaming;
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if (was_streaming != 0) {
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if (was_streaming) {
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if (gspca_dev->capt_file != 0
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&& gspca_dev->capt_file != file) {
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ret = -EBUSY;
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goto out;
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}
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if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
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ret = -ERESTARTSYS;
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goto out;
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@ -824,8 +822,8 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv,
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gspca_stream_off(gspca_dev);
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mutex_unlock(&gspca_dev->usb_lock);
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}
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gspca_dev->width = (int) fmt->fmt.pix.width;
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gspca_dev->height = (int) fmt->fmt.pix.height;
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gspca_dev->width = fmt->fmt.pix.width;
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gspca_dev->height = fmt->fmt.pix.height;
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gspca_dev->pixfmt = fmt->fmt.pix.pixelformat;
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gspca_dev->curr_mode = ret;
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if (was_streaming)
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@ -891,17 +889,18 @@ static int dev_close(struct inode *inode, struct file *file)
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if (mutex_lock_interruptible(&gspca_dev->queue_lock))
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return -ERESTARTSYS;
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gspca_dev->users--;
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if (gspca_dev->users > 0) {
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mutex_unlock(&gspca_dev->queue_lock);
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return 0;
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}
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/* if the file did capture, free the streaming resources */
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if (gspca_dev->capt_file == file) {
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mutex_lock(&gspca_dev->usb_lock);
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if (gspca_dev->streaming)
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gspca_stream_off(gspca_dev);
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gspca_dev->sd_desc->close(gspca_dev);
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mutex_unlock(&gspca_dev->usb_lock);
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frame_free(gspca_dev);
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file->private_data = NULL;
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gspca_dev->capt_file = 0;
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}
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mutex_unlock(&gspca_dev->queue_lock);
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PDEBUG(D_STREAM, "closed");
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return 0;
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@ -1052,12 +1051,19 @@ static int vidioc_reqbufs(struct file *file, void *priv,
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return frsz;
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if (mutex_lock_interruptible(&gspca_dev->queue_lock))
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return -ERESTARTSYS;
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if (gspca_dev->capt_file != 0) { /* only one file may do capture */
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ret = -EBUSY;
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goto out;
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}
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ret = frame_alloc(gspca_dev,
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rb->count,
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(unsigned int) frsz,
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rb->memory);
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if (ret == 0)
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if (ret == 0) {
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rb->count = gspca_dev->nframes;
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gspca_dev->capt_file = file;
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}
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out:
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mutex_unlock(&gspca_dev->queue_lock);
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PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count);
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return ret;
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@ -1099,6 +1105,10 @@ static int vidioc_streamon(struct file *file, void *priv,
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ret = -EINVAL;
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goto out;
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}
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if (gspca_dev->capt_file != file) {
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ret = -EINVAL;
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goto out;
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}
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if (!gspca_dev->streaming) {
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ret = gspca_init_transfer(gspca_dev);
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if (ret < 0)
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@ -1122,22 +1132,30 @@ static int vidioc_streamoff(struct file *file, void *priv,
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enum v4l2_buf_type buf_type)
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{
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struct gspca_dev *gspca_dev = priv;
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int ret;
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PDEBUG(D_STREAM, "stream off");
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if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
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return -EINVAL;
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if (gspca_dev->streaming) {
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if (!gspca_dev->streaming)
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return 0;
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if (mutex_lock_interruptible(&gspca_dev->queue_lock))
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return -ERESTARTSYS;
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if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
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mutex_unlock(&gspca_dev->queue_lock);
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return -ERESTARTSYS;
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ret = -ERESTARTSYS;
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goto out;
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}
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if (gspca_dev->capt_file != file) {
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ret = -EINVAL;
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goto out2;
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}
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gspca_stream_off(gspca_dev);
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ret = 0;
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out2:
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mutex_unlock(&gspca_dev->usb_lock);
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out:
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mutex_unlock(&gspca_dev->queue_lock);
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}
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return 0;
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return ret;
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}
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static int vidioc_g_jpegcomp(struct file *file, void *priv,
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@ -1187,14 +1205,11 @@ static int vidioc_s_parm(struct file *filp, void *priv,
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struct gspca_dev *gspca_dev = priv;
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int n;
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if (mutex_lock_interruptible(&gspca_dev->usb_lock))
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return -ERESTARTSYS;
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n = parm->parm.capture.readbuffers;
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if (n == 0 || n > GSPCA_MAX_FRAMES)
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parm->parm.capture.readbuffers = gspca_dev->nbufread;
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else
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gspca_dev->nbufread = n;
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mutex_unlock(&gspca_dev->usb_lock);
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return 0;
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}
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@ -1245,7 +1260,11 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma)
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return -ERESTARTSYS;
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if (!gspca_dev->present) {
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ret = -ENODEV;
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goto done;
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goto out;
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}
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if (gspca_dev->capt_file != file) {
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ret = -EINVAL;
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goto out;
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}
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for (i = 0; i < gspca_dev->nframes; ++i) {
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@ -1262,7 +1281,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma)
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if (frame == 0) {
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PDEBUG(D_STREAM, "mmap no frame buffer found");
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ret = -EINVAL;
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goto done;
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goto out;
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}
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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if (i == 0 && size == frame->v4l2_buf.length * gspca_dev->nframes)
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@ -1272,7 +1291,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma)
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if (size != frame->v4l2_buf.length) {
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PDEBUG(D_STREAM, "mmap bad size");
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ret = -EINVAL;
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goto done;
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goto out;
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}
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/*
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@ -1286,7 +1305,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma)
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page = vmalloc_to_page((void *) addr);
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ret = vm_insert_page(vma, start, page);
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if (ret < 0)
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goto done;
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goto out;
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start += PAGE_SIZE;
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addr += PAGE_SIZE;
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size -= PAGE_SIZE;
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@ -1304,7 +1323,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma)
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}
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#endif
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ret = 0;
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done:
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out:
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mutex_unlock(&gspca_dev->queue_lock);
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return ret;
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}
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@ -1356,10 +1375,14 @@ static int gspca_frame_wait(struct gspca_dev *gspca_dev,
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/* wait till a frame is ready */
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for (;;) {
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ret = wait_event_interruptible(gspca_dev->wq,
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atomic_read(&gspca_dev->nevent) > 0);
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if (ret != 0)
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ret = wait_event_interruptible_timeout(gspca_dev->wq,
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atomic_read(&gspca_dev->nevent) > 0,
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msecs_to_jiffies(3000));
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if (ret <= 0) {
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if (ret < 0)
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return ret;
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return -EIO;
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}
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if (!gspca_dev->streaming || !gspca_dev->present)
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return -EIO;
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i = gspca_dev->fr_o;
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@ -1402,6 +1425,10 @@ static int vidioc_dqbuf(struct file *file, void *priv,
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return -EINVAL;
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if (!gspca_dev->streaming)
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return -EINVAL;
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if (gspca_dev->capt_file != file) {
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ret = -EINVAL;
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goto out;
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}
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/* only one read */
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if (mutex_lock_interruptible(&gspca_dev->read_lock))
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@ -1409,14 +1436,14 @@ static int vidioc_dqbuf(struct file *file, void *priv,
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ret = gspca_frame_wait(gspca_dev, file->f_flags & O_NONBLOCK);
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if (ret < 0)
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goto done;
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goto out;
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i = ret; /* frame index */
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frame = &gspca_dev->frame[i];
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frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE;
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memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf);
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PDEBUG(D_FRAM, "dqbuf %d", i);
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ret = 0;
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done:
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out:
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mutex_unlock(&gspca_dev->read_lock);
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return ret;
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}
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@ -1450,6 +1477,8 @@ static int vidioc_qbuf(struct file *file, void *priv,
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PDEBUG(D_STREAM, "qbuf bad memory type");
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return -EINVAL;
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}
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if (gspca_dev->capt_file != file)
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return -EINVAL;
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if (mutex_lock_interruptible(&gspca_dev->queue_lock))
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return -ERESTARTSYS;
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@ -1524,7 +1553,9 @@ static ssize_t dev_read(struct file *file, char __user *data,
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return ret;
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}
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}
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}
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} else if (gspca_dev->capt_file != file)
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return -EINVAL;
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if (!gspca_dev->streaming) {
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ret = vidioc_streamon(file, gspca_dev,
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V4L2_BUF_TYPE_VIDEO_CAPTURE);
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@ -108,11 +108,6 @@ struct sd_desc {
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cam_qmnu_op querymenu;
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};
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struct gspca_pktbuf {
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char *data;
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struct urb *urb;
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};
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/* packet types when moving from iso buf to frame buf */
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#define DISCARD_PACKET 0
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#define FIRST_PACKET 1
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@ -121,7 +116,7 @@ struct gspca_pktbuf {
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struct gspca_frame {
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unsigned char *data; /* frame buffer */
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unsigned char *data_end; /* current end of frame while filling */
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unsigned char *data_end; /* end of frame while filling */
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int vma_use_count;
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struct v4l2_buffer v4l2_buf;
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};
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@ -129,11 +124,12 @@ struct gspca_frame {
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struct gspca_dev {
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struct video_device vdev; /* !! must be the first item */
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struct usb_device *dev;
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struct file *capt_file; /* file doing video capture */
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struct cam cam; /* device information */
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const struct sd_desc *sd_desc; /* subdriver description */
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struct gspca_pktbuf pktbuf[NURBS];
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struct urb *urb[NURBS];
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__u8 *frbuf; /* buffer for nframes */
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struct gspca_frame frame[GSPCA_MAX_FRAMES];
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@ -147,7 +143,7 @@ struct gspca_dev {
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__u8 iface; /* USB interface number */
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__u8 alt; /* USB alternate setting */
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char curr_mode; /* current camera mode */
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unsigned char curr_mode; /* current camera mode */
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__u32 pixfmt; /* current mode parameters */
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short width;
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short height;
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@ -158,7 +154,7 @@ struct gspca_dev {
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struct mutex read_lock; /* read protection */
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struct mutex queue_lock; /* ISOC queue protection */
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__u32 sequence; /* frame sequence number */
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||||
signed char streaming;
|
||||
char streaming;
|
||||
char users; /* # open */
|
||||
char present; /* device connected */
|
||||
char nbufread; /* number of buffers for read() */
|
||||
|
|
|
|||
|
|
@ -27,8 +27,8 @@
|
|||
|
||||
#include "gspca.h"
|
||||
|
||||
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 30)
|
||||
static const char version[] = "0.0.30";
|
||||
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 1)
|
||||
static const char version[] = "0.1.1";
|
||||
|
||||
MODULE_AUTHOR("Hans de Goede <j.w.r.degoede@hhs.nl>");
|
||||
MODULE_DESCRIPTION("Pixart PAC207");
|
||||
|
|
@ -251,6 +251,7 @@ int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index)
|
|||
static int sd_config(struct gspca_dev *gspca_dev,
|
||||
const struct usb_device_id *id)
|
||||
{
|
||||
struct sd *sd = (struct sd *) gspca_dev;
|
||||
struct cam *cam;
|
||||
u8 idreg[2];
|
||||
|
||||
|
|
@ -282,6 +283,9 @@ static int sd_config(struct gspca_dev *gspca_dev,
|
|||
cam->epaddr = 0x05;
|
||||
cam->cam_mode = sif_mode;
|
||||
cam->nmodes = ARRAY_SIZE(sif_mode);
|
||||
sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
|
||||
sd->exposure = PAC207_EXPOSURE_DEFAULT;
|
||||
sd->gain = PAC207_GAIN_DEFAULT;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -291,9 +295,6 @@ static int sd_open(struct gspca_dev *gspca_dev)
|
|||
{
|
||||
struct sd *sd = (struct sd *) gspca_dev;
|
||||
|
||||
sd->brightness = PAC207_BRIGHTNESS_DEFAULT;
|
||||
sd->exposure = PAC207_EXPOSURE_DEFAULT;
|
||||
sd->gain = PAC207_GAIN_DEFAULT;
|
||||
sd->autogain = 1;
|
||||
|
||||
return 0;
|
||||
|
|
|
|||
|
|
@ -24,8 +24,8 @@
|
|||
#include "gspca.h"
|
||||
#include "jpeg.h"
|
||||
|
||||
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 22)
|
||||
static const char version[] = "0.0.22";
|
||||
#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0)
|
||||
static const char version[] = "0.1.0";
|
||||
|
||||
MODULE_AUTHOR("Jean-Francois Moine <http://moinejf.free.fr>");
|
||||
MODULE_DESCRIPTION("Syntek DV4000 (STK014) USB Camera Driver");
|
||||
|
|
@ -390,6 +390,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
|
|||
int len) /* iso packet length */
|
||||
{
|
||||
int l;
|
||||
static unsigned char ffd9[] = {0xff, 0xd9};
|
||||
|
||||
/* a frame starts with:
|
||||
* - 0xff 0xfe
|
||||
|
|
@ -445,7 +446,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev,
|
|||
if (len > frame->v4l2_buf.bytesused - 2 - l)
|
||||
len = frame->v4l2_buf.bytesused - 2 - l;
|
||||
gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len);
|
||||
gspca_frame_add(gspca_dev, LAST_PACKET, frame, "\xff\xd9", 2);
|
||||
gspca_frame_add(gspca_dev, LAST_PACKET, frame, ffd9, 2);
|
||||
}
|
||||
|
||||
static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val)
|
||||
|
|
|
|||
Loading…
Reference in a new issue