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[34.88.141.166]) by smtp.gmail.com with ESMTPSA id 2adb3069b0e04-5550b2d8ea8sm1432363e87.210.2025.06.30.07.20.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Jun 2025 07:20:27 -0700 (PDT) From: Ricardo Ribalda Date: Mon, 30 Jun 2025 14:20:26 +0000 Subject: [PATCH v3 1/8] media: uvcvideo: Use vb2 ioctl and fop helpers Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250630-uvc-grannular-invert-v3-1-abd5cb5c45b7@chromium.org> References: <20250630-uvc-grannular-invert-v3-0-abd5cb5c45b7@chromium.org> In-Reply-To: <20250630-uvc-grannular-invert-v3-0-abd5cb5c45b7@chromium.org> To: Laurent Pinchart , Mauro Carvalho Chehab , Hans Verkuil , Hans de Goede , Hans de Goede Cc: linux-media@vger.kernel.org, linux-kernel@vger.kernel.org, Ricardo Ribalda , Hans Verkuil X-Mailer: b4 0.14.2 From: Hans Verkuil When uvc was written the vb2 ioctl and file operation helpers didn't exist. This patch switches uvc over to those helpers, which removes a lot of boilerplate code and allows us to drop the 'privileges' scheme, since that's now handled inside the vb2 helpers. This makes it possible for uvc to fix the v4l2-compliance streaming tests: warn: v4l2-test-formats.cpp(1075): Could not set fmt2 This patch introduces a change on behavior on the uvcdriver to be aligned with the rest of the subsystem. Now S_INPUT, S_PARM and S_FORMAT do no grant exclusive ownership of the device. There are other side effects, some better than others: - Locking is now more coarse than before, the queue is locked for almost every ioctl. - vidioc_querybuf() can now work when the queue is busy. Future patches should look into the locking architecture of UVC to remove one of stream->mutex or queue->mutex. Reviewed-by: Hans de Goede Reviewed-by: Hans Verkuil Signed-off-by: Hans Verkuil Co-developed-by: Ricardo Ribalda Signed-off-by: Ricardo Ribalda Link: https://lore.kernel.org/r/20250616-uvc-fop-v4-1-250286570ee7@chromium= .org Signed-off-by: Hans de Goede --- drivers/media/usb/uvc/uvc_driver.c | 37 ++--- drivers/media/usb/uvc/uvc_metadata.c | 8 +- drivers/media/usb/uvc/uvc_queue.c | 143 -------------------- drivers/media/usb/uvc/uvc_v4l2.c | 252 +++----------------------------= ---- drivers/media/usb/uvc/uvcvideo.h | 36 +---- 5 files changed, 34 insertions(+), 442 deletions(-) diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc= _driver.c index 62eb45435d8bec5c955720ecb46fb8936871e6cc..accfb4ca3c72cb899185ddc8ecf= 4e29143d58fc6 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -1961,31 +1961,7 @@ static void uvc_unregister_video(struct uvc_device *= dev) if (!video_is_registered(&stream->vdev)) continue; =20 - /* - * For stream->vdev we follow the same logic as: - * vb2_video_unregister_device(). - */ - - /* 1. Take a reference to vdev */ - get_device(&stream->vdev.dev); - - /* 2. Ensure that no new ioctls can be called. */ - video_unregister_device(&stream->vdev); - - /* 3. Wait for old ioctls to finish. */ - mutex_lock(&stream->mutex); - - /* 4. Stop streaming. */ - uvc_queue_release(&stream->queue); - - mutex_unlock(&stream->mutex); - - put_device(&stream->vdev.dev); - - /* - * For stream->meta.vdev we can directly call: - * vb2_video_unregister_device(). - */ + vb2_video_unregister_device(&stream->vdev); vb2_video_unregister_device(&stream->meta.vdev); =20 /* @@ -2033,6 +2009,8 @@ int uvc_register_video_device(struct uvc_device *dev, vdev->ioctl_ops =3D ioctl_ops; vdev->release =3D uvc_release; vdev->prio =3D &stream->chain->prio; + vdev->queue =3D &queue->queue; + vdev->lock =3D &queue->mutex; if (type =3D=3D V4L2_BUF_TYPE_VIDEO_OUTPUT) vdev->vfl_dir =3D VFL_DIR_TX; else @@ -2397,9 +2375,12 @@ static int __uvc_resume(struct usb_interface *intf, = int reset) list_for_each_entry(stream, &dev->streams, list) { if (stream->intf =3D=3D intf) { ret =3D uvc_video_resume(stream, reset); - if (ret < 0) - uvc_queue_streamoff(&stream->queue, - stream->queue.queue.type); + if (ret < 0) { + mutex_lock(&stream->queue.mutex); + vb2_streamoff(&stream->queue.queue, + stream->queue.queue.type); + mutex_unlock(&stream->queue.mutex); + } return ret; } } diff --git a/drivers/media/usb/uvc/uvc_metadata.c b/drivers/media/usb/uvc/u= vc_metadata.c index 82de7781f5b6b70c5ba16bcba9e0741231231904..d3aab22f91cea21aefc56409924= dfa1451aec914 100644 --- a/drivers/media/usb/uvc/uvc_metadata.c +++ b/drivers/media/usb/uvc/uvc_metadata.c @@ -96,7 +96,7 @@ static int uvc_meta_v4l2_set_format(struct file *file, vo= id *fh, */ mutex_lock(&stream->mutex); =20 - if (uvc_queue_allocated(&stream->queue)) + if (vb2_is_busy(&stream->meta.queue.queue)) ret =3D -EBUSY; else stream->meta.format =3D fmt->dataformat; @@ -164,12 +164,6 @@ int uvc_meta_register(struct uvc_streaming *stream) =20 stream->meta.format =3D V4L2_META_FMT_UVC; =20 - /* - * The video interface queue uses manual locking and thus does not set - * the queue pointer. Set it manually here. - */ - vdev->queue =3D &queue->queue; - return uvc_register_video_device(dev, stream, vdev, queue, V4L2_BUF_TYPE_META_CAPTURE, &uvc_meta_fops, &uvc_meta_ioctl_ops); diff --git a/drivers/media/usb/uvc/uvc_queue.c b/drivers/media/usb/uvc/uvc_= queue.c index 2ee142621042167c2587b6a6fdd51c1a46d31c11..72c5494dee9f46ff61072e7d293= bfaddda40e615 100644 --- a/drivers/media/usb/uvc/uvc_queue.c +++ b/drivers/media/usb/uvc/uvc_queue.c @@ -242,153 +242,10 @@ int uvc_queue_init(struct uvc_video_queue *queue, en= um v4l2_buf_type type) return 0; } =20 -void uvc_queue_release(struct uvc_video_queue *queue) -{ - mutex_lock(&queue->mutex); - vb2_queue_release(&queue->queue); - mutex_unlock(&queue->mutex); -} - -/* -----------------------------------------------------------------------= ------ - * V4L2 queue operations - */ - -int uvc_request_buffers(struct uvc_video_queue *queue, - struct v4l2_requestbuffers *rb) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_reqbufs(&queue->queue, rb); - mutex_unlock(&queue->mutex); - - return ret ? ret : rb->count; -} - -int uvc_query_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *bu= f) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_querybuf(&queue->queue, buf); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_create_buffers(struct uvc_video_queue *queue, - struct v4l2_create_buffers *cb) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_create_bufs(&queue->queue, cb); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_queue_buffer(struct uvc_video_queue *queue, - struct media_device *mdev, struct v4l2_buffer *buf) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_qbuf(&queue->queue, mdev, buf); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_export_buffer(struct uvc_video_queue *queue, - struct v4l2_exportbuffer *exp) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_expbuf(&queue->queue, exp); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_dequeue_buffer(struct uvc_video_queue *queue, struct v4l2_buffer *= buf, - int nonblocking) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_dqbuf(&queue->queue, buf, nonblocking); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type t= ype) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_streamon(&queue->queue, type); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type = type) -{ - int ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_streamoff(&queue->queue, type); - mutex_unlock(&queue->mutex); - - return ret; -} - -int uvc_queue_mmap(struct uvc_video_queue *queue, struct vm_area_struct *v= ma) -{ - return vb2_mmap(&queue->queue, vma); -} - -#ifndef CONFIG_MMU -unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, - unsigned long pgoff) -{ - return vb2_get_unmapped_area(&queue->queue, 0, 0, pgoff, 0); -} -#endif - -__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, - poll_table *wait) -{ - __poll_t ret; - - mutex_lock(&queue->mutex); - ret =3D vb2_poll(&queue->queue, file, wait); - mutex_unlock(&queue->mutex); - - return ret; -} - /* -----------------------------------------------------------------------= ------ * */ =20 -/* - * Check if buffers have been allocated. - */ -int uvc_queue_allocated(struct uvc_video_queue *queue) -{ - int allocated; - - mutex_lock(&queue->mutex); - allocated =3D vb2_is_busy(&queue->queue); - mutex_unlock(&queue->mutex); - - return allocated; -} - /* * Cancel the video buffers queue. * diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v= 4l2.c index 1abdf1ea39956bbbadd3f166f37bdac518068648..d06ecf3418a988152c6c413568c= e32e60040fd87 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -47,8 +47,6 @@ void uvc_pm_put(struct uvc_device *dev) usb_autopm_put_interface(dev->intf); } =20 -static int uvc_acquire_privileges(struct uvc_fh *handle); - static int uvc_control_add_xu_mapping(struct uvc_video_chain *chain, struct uvc_control_mapping *map, const struct uvc_xu_control_mapping *xmap) @@ -436,10 +434,6 @@ static int uvc_ioctl_s_fmt(struct file *file, void *fh, const struct uvc_frame *frame; int ret; =20 - ret =3D uvc_acquire_privileges(handle); - if (ret < 0) - return ret; - if (fmt->type !=3D stream->type) return -EINVAL; =20 @@ -448,8 +442,7 @@ static int uvc_ioctl_s_fmt(struct file *file, void *fh, return ret; =20 mutex_lock(&stream->mutex); - - if (uvc_queue_allocated(&stream->queue)) { + if (vb2_is_busy(&stream->queue.queue)) { ret =3D -EBUSY; goto done; } @@ -513,10 +506,6 @@ static int uvc_ioctl_s_parm(struct file *file, void *f= h, unsigned int i; int ret; =20 - ret =3D uvc_acquire_privileges(handle); - if (ret < 0) - return ret; - if (parm->type !=3D stream->type) return -EINVAL; =20 @@ -593,63 +582,6 @@ static int uvc_ioctl_s_parm(struct file *file, void *f= h, return 0; } =20 -/* ------------------------------------------------------------------------ - * Privilege management - */ - -/* - * Privilege management is the multiple-open implementation basis. The cur= rent - * implementation is completely transparent for the end-user and doesn't - * require explicit use of the VIDIOC_G_PRIORITY and VIDIOC_S_PRIORITY ioc= tls. - * Those ioctls enable finer control on the device (by making possible for= a - * user to request exclusive access to a device), but are not mature yet. - * Switching to the V4L2 priority mechanism might be considered in the fut= ure - * if this situation changes. - * - * Each open instance of a UVC device can either be in a privileged or - * unprivileged state. Only a single instance can be in a privileged state= at - * a given time. Trying to perform an operation that requires privileges w= ill - * automatically acquire the required privileges if possible, or return -E= BUSY - * otherwise. Privileges are dismissed when closing the instance or when - * freeing the video buffers using VIDIOC_REQBUFS. - * - * Operations that require privileges are: - * - * - VIDIOC_S_INPUT - * - VIDIOC_S_PARM - * - VIDIOC_S_FMT - * - VIDIOC_CREATE_BUFS - * - VIDIOC_REQBUFS - */ -static int uvc_acquire_privileges(struct uvc_fh *handle) -{ - /* Always succeed if the handle is already privileged. */ - if (handle->state =3D=3D UVC_HANDLE_ACTIVE) - return 0; - - /* Check if the device already has a privileged handle. */ - if (atomic_inc_return(&handle->stream->active) !=3D 1) { - atomic_dec(&handle->stream->active); - return -EBUSY; - } - - handle->state =3D UVC_HANDLE_ACTIVE; - return 0; -} - -static void uvc_dismiss_privileges(struct uvc_fh *handle) -{ - if (handle->state =3D=3D UVC_HANDLE_ACTIVE) - atomic_dec(&handle->stream->active); - - handle->state =3D UVC_HANDLE_PASSIVE; -} - -static int uvc_has_privileges(struct uvc_fh *handle) -{ - return handle->state =3D=3D UVC_HANDLE_ACTIVE; -} - /* ------------------------------------------------------------------------ * V4L2 file operations */ @@ -671,7 +603,6 @@ static int uvc_v4l2_open(struct file *file) v4l2_fh_add(&handle->vfh); handle->chain =3D stream->chain; handle->stream =3D stream; - handle->state =3D UVC_HANDLE_PASSIVE; file->private_data =3D handle; =20 return 0; @@ -686,19 +617,11 @@ static int uvc_v4l2_release(struct file *file) =20 uvc_ctrl_cleanup_fh(handle); =20 - /* Only free resources if this is a privileged handle. */ - if (uvc_has_privileges(handle)) - uvc_queue_release(&stream->queue); - if (handle->is_streaming) uvc_pm_put(stream->dev); =20 /* Release the file handle. */ - uvc_dismiss_privileges(handle); - v4l2_fh_del(&handle->vfh); - v4l2_fh_exit(&handle->vfh); - kfree(handle); - file->private_data =3D NULL; + vb2_fop_release(file); =20 return 0; } @@ -753,91 +676,6 @@ static int uvc_ioctl_try_fmt(struct file *file, void *= fh, return uvc_v4l2_try_format(stream, fmt, &probe, NULL, NULL); } =20 -static int uvc_ioctl_reqbufs(struct file *file, void *fh, - struct v4l2_requestbuffers *rb) -{ - struct uvc_fh *handle =3D fh; - struct uvc_streaming *stream =3D handle->stream; - int ret; - - ret =3D uvc_acquire_privileges(handle); - if (ret < 0) - return ret; - - mutex_lock(&stream->mutex); - ret =3D uvc_request_buffers(&stream->queue, rb); - mutex_unlock(&stream->mutex); - if (ret < 0) - return ret; - - if (ret =3D=3D 0) - uvc_dismiss_privileges(handle); - - return 0; -} - -static int uvc_ioctl_querybuf(struct file *file, void *fh, - struct v4l2_buffer *buf) -{ - struct uvc_fh *handle =3D fh; - struct uvc_streaming *stream =3D handle->stream; - - if (!uvc_has_privileges(handle)) - return -EBUSY; - - return uvc_query_buffer(&stream->queue, buf); -} - -static int uvc_ioctl_qbuf(struct file *file, void *fh, struct v4l2_buffer = *buf) -{ - struct uvc_fh *handle =3D fh; - struct uvc_streaming *stream =3D handle->stream; - - if (!uvc_has_privileges(handle)) - return -EBUSY; - - return uvc_queue_buffer(&stream->queue, - stream->vdev.v4l2_dev->mdev, buf); -} - -static int uvc_ioctl_expbuf(struct file *file, void *fh, - struct v4l2_exportbuffer *exp) -{ - struct uvc_fh *handle =3D fh; - struct uvc_streaming *stream =3D handle->stream; - - if (!uvc_has_privileges(handle)) - return -EBUSY; - - return uvc_export_buffer(&stream->queue, exp); -} - -static int uvc_ioctl_dqbuf(struct file *file, void *fh, struct v4l2_buffer= *buf) -{ - struct uvc_fh *handle =3D fh; - struct uvc_streaming *stream =3D handle->stream; - - if (!uvc_has_privileges(handle)) - return -EBUSY; - - return uvc_dequeue_buffer(&stream->queue, buf, - file->f_flags & O_NONBLOCK); -} - -static int uvc_ioctl_create_bufs(struct file *file, void *fh, - struct v4l2_create_buffers *cb) -{ - struct uvc_fh *handle =3D fh; - struct uvc_streaming *stream =3D handle->stream; - int ret; - - ret =3D uvc_acquire_privileges(handle); - if (ret < 0) - return ret; - - return uvc_create_buffers(&stream->queue, cb); -} - static int uvc_ioctl_streamon(struct file *file, void *fh, enum v4l2_buf_type type) { @@ -845,11 +683,6 @@ static int uvc_ioctl_streamon(struct file *file, void = *fh, struct uvc_streaming *stream =3D handle->stream; int ret; =20 - if (!uvc_has_privileges(handle)) - return -EBUSY; - - guard(mutex)(&stream->mutex); - if (handle->is_streaming) return 0; =20 @@ -857,7 +690,7 @@ static int uvc_ioctl_streamon(struct file *file, void *= fh, if (ret) return ret; =20 - ret =3D uvc_queue_streamon(&stream->queue, type); + ret =3D vb2_ioctl_streamon(file, fh, type); if (ret) { uvc_pm_put(stream->dev); return ret; @@ -873,13 +706,12 @@ static int uvc_ioctl_streamoff(struct file *file, voi= d *fh, { struct uvc_fh *handle =3D fh; struct uvc_streaming *stream =3D handle->stream; + int ret; =20 - if (!uvc_has_privileges(handle)) - return -EBUSY; - - guard(mutex)(&stream->mutex); + ret =3D vb2_ioctl_streamoff(file, fh, type); + if (ret) + return ret; =20 - uvc_queue_streamoff(&stream->queue, type); if (handle->is_streaming) { handle->is_streaming =3D false; uvc_pm_put(stream->dev); @@ -962,13 +794,13 @@ static int uvc_ioctl_g_input(struct file *file, void = *fh, unsigned int *input) static int uvc_ioctl_s_input(struct file *file, void *fh, unsigned int inp= ut) { struct uvc_fh *handle =3D fh; + struct uvc_streaming *stream =3D handle->stream; struct uvc_video_chain *chain =3D handle->chain; u8 *buf; int ret; =20 - ret =3D uvc_acquire_privileges(handle); - if (ret < 0) - return ret; + if (vb2_is_busy(&stream->queue.queue)) + return -EBUSY; =20 if (chain->selector =3D=3D NULL || (chain->dev->quirks & UVC_QUIRK_IGNORE_SELECTOR_UNIT)) { @@ -1469,50 +1301,6 @@ static long uvc_v4l2_unlocked_ioctl(struct file *fil= e, return ret; } =20 -static ssize_t uvc_v4l2_read(struct file *file, char __user *data, - size_t count, loff_t *ppos) -{ - struct uvc_fh *handle =3D file->private_data; - struct uvc_streaming *stream =3D handle->stream; - - uvc_dbg(stream->dev, CALLS, "%s: not implemented\n", __func__); - return -EINVAL; -} - -static int uvc_v4l2_mmap(struct file *file, struct vm_area_struct *vma) -{ - struct uvc_fh *handle =3D file->private_data; - struct uvc_streaming *stream =3D handle->stream; - - uvc_dbg(stream->dev, CALLS, "%s\n", __func__); - - return uvc_queue_mmap(&stream->queue, vma); -} - -static __poll_t uvc_v4l2_poll(struct file *file, poll_table *wait) -{ - struct uvc_fh *handle =3D file->private_data; - struct uvc_streaming *stream =3D handle->stream; - - uvc_dbg(stream->dev, CALLS, "%s\n", __func__); - - return uvc_queue_poll(&stream->queue, file, wait); -} - -#ifndef CONFIG_MMU -static unsigned long uvc_v4l2_get_unmapped_area(struct file *file, - unsigned long addr, unsigned long len, unsigned long pgoff, - unsigned long flags) -{ - struct uvc_fh *handle =3D file->private_data; - struct uvc_streaming *stream =3D handle->stream; - - uvc_dbg(stream->dev, CALLS, "%s\n", __func__); - - return uvc_queue_get_unmapped_area(&stream->queue, pgoff); -} -#endif - const struct v4l2_ioctl_ops uvc_ioctl_ops =3D { .vidioc_g_fmt_vid_cap =3D uvc_ioctl_g_fmt, .vidioc_g_fmt_vid_out =3D uvc_ioctl_g_fmt, @@ -1525,12 +1313,13 @@ const struct v4l2_ioctl_ops uvc_ioctl_ops =3D { .vidioc_enum_fmt_vid_out =3D uvc_ioctl_enum_fmt, .vidioc_try_fmt_vid_cap =3D uvc_ioctl_try_fmt, .vidioc_try_fmt_vid_out =3D uvc_ioctl_try_fmt, - .vidioc_reqbufs =3D uvc_ioctl_reqbufs, - .vidioc_querybuf =3D uvc_ioctl_querybuf, - .vidioc_qbuf =3D uvc_ioctl_qbuf, - .vidioc_expbuf =3D uvc_ioctl_expbuf, - .vidioc_dqbuf =3D uvc_ioctl_dqbuf, - .vidioc_create_bufs =3D uvc_ioctl_create_bufs, + .vidioc_reqbufs =3D vb2_ioctl_reqbufs, + .vidioc_querybuf =3D vb2_ioctl_querybuf, + .vidioc_prepare_buf =3D vb2_ioctl_prepare_buf, + .vidioc_qbuf =3D vb2_ioctl_qbuf, + .vidioc_expbuf =3D vb2_ioctl_expbuf, + .vidioc_dqbuf =3D vb2_ioctl_dqbuf, + .vidioc_create_bufs =3D vb2_ioctl_create_bufs, .vidioc_streamon =3D uvc_ioctl_streamon, .vidioc_streamoff =3D uvc_ioctl_streamoff, .vidioc_enum_input =3D uvc_ioctl_enum_input, @@ -1557,11 +1346,10 @@ const struct v4l2_file_operations uvc_fops =3D { #ifdef CONFIG_COMPAT .compat_ioctl32 =3D uvc_v4l2_compat_ioctl32, #endif - .read =3D uvc_v4l2_read, - .mmap =3D uvc_v4l2_mmap, - .poll =3D uvc_v4l2_poll, + .mmap =3D vb2_fop_mmap, + .poll =3D vb2_fop_poll, #ifndef CONFIG_MMU - .get_unmapped_area =3D uvc_v4l2_get_unmapped_area, + .get_unmapped_area =3D vb2_fop_get_unmapped_area, #endif }; =20 diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvi= deo.h index 11d6e3c2ebdfbabd7bbe5722f88ff85f406d9bb6..b300487e6ec9163ac8236803b9e= 819814233f419 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -328,7 +328,10 @@ struct uvc_buffer { =20 struct uvc_video_queue { struct vb2_queue queue; - struct mutex mutex; /* Protects queue */ + struct mutex mutex; /* + * Serializes vb2_queue and + * fops + */ =20 unsigned int flags; unsigned int buf_used; @@ -621,16 +624,10 @@ struct uvc_device { struct uvc_entity *gpio_unit; }; =20 -enum uvc_handle_state { - UVC_HANDLE_PASSIVE =3D 0, - UVC_HANDLE_ACTIVE =3D 1, -}; - struct uvc_fh { struct v4l2_fh vfh; struct uvc_video_chain *chain; struct uvc_streaming *stream; - enum uvc_handle_state state; unsigned int pending_async_ctrls; bool is_streaming; }; @@ -689,36 +686,11 @@ struct uvc_entity *uvc_entity_by_id(struct uvc_device= *dev, int id); =20 /* Video buffers queue management. */ int uvc_queue_init(struct uvc_video_queue *queue, enum v4l2_buf_type type); -void uvc_queue_release(struct uvc_video_queue *queue); -int uvc_request_buffers(struct uvc_video_queue *queue, - struct v4l2_requestbuffers *rb); -int uvc_query_buffer(struct uvc_video_queue *queue, - struct v4l2_buffer *v4l2_buf); -int uvc_create_buffers(struct uvc_video_queue *queue, - struct v4l2_create_buffers *v4l2_cb); -int uvc_queue_buffer(struct uvc_video_queue *queue, - struct media_device *mdev, - struct v4l2_buffer *v4l2_buf); -int uvc_export_buffer(struct uvc_video_queue *queue, - struct v4l2_exportbuffer *exp); -int uvc_dequeue_buffer(struct uvc_video_queue *queue, - struct v4l2_buffer *v4l2_buf, int nonblocking); -int uvc_queue_streamon(struct uvc_video_queue *queue, enum v4l2_buf_type t= ype); -int uvc_queue_streamoff(struct uvc_video_queue *queue, enum v4l2_buf_type = type); void uvc_queue_cancel(struct uvc_video_queue *queue, int disconnect); struct uvc_buffer *uvc_queue_next_buffer(struct uvc_video_queue *queue, struct uvc_buffer *buf); struct uvc_buffer *uvc_queue_get_current_buffer(struct uvc_video_queue *qu= eue); void uvc_queue_buffer_release(struct uvc_buffer *buf); -int uvc_queue_mmap(struct uvc_video_queue *queue, - struct vm_area_struct *vma); -__poll_t uvc_queue_poll(struct uvc_video_queue *queue, struct file *file, - poll_table *wait); -#ifndef CONFIG_MMU -unsigned long uvc_queue_get_unmapped_area(struct uvc_video_queue *queue, - unsigned long pgoff); -#endif -int uvc_queue_allocated(struct uvc_video_queue *queue); static inline int uvc_queue_streaming(struct uvc_video_queue *queue) { return vb2_is_streaming(&queue->queue); --=20 2.50.0.727.gbf7dc18ff4-goog