Hi Hans,
Thank you for the patch. This is a pretty useful debugging tool. Please see
below for two small comments.
On Tuesday 25 February 2014 13:52:44 Hans Verkuil wrote:
> From: Hans Verkuil <hans.verk...@cisco.com>
>
> When a vb2_queue is freed check if all the mem_ops and queue ops were
> balanced. So the number of calls to e.g. buf_finish has to match the number
> of calls to buf_prepare, etc.
>
> This code is only enabled if CONFIG_VIDEO_ADV_DEBUG is set.
>
> Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> Acked-by: Pawel Osciak <pa...@osciak.com>
> ---
> drivers/media/v4l2-core/videobuf2-core.c | 233 +++++++++++++++++++++-------
> include/media/videobuf2-core.h | 43 ++++++
> 2 files changed, 226 insertions(+), 50 deletions(-)
>
> diff --git a/drivers/media/v4l2-core/videobuf2-core.c
> b/drivers/media/v4l2-core/videobuf2-core.c index 909f367..8f1578b 100644
> --- a/drivers/media/v4l2-core/videobuf2-core.c
> +++ b/drivers/media/v4l2-core/videobuf2-core.c
> @@ -33,12 +33,63 @@ module_param(debug, int, 0644);
> printk(KERN_DEBUG "vb2: " fmt, ## arg); \
> } while (0)
>
> -#define call_memop(q, op, args...) \
> - (((q)->mem_ops->op) ? \
> - ((q)->mem_ops->op(args)) : 0)
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> +
> +/*
> + * If advanced debugging is on, then count how often each op is called,
> + * which can either be per-buffer or per-queue.
> + *
> + * If the op failed then the 'fail_' variant is called to decrease the
> + * counter. That makes it easy to check that the 'init' and 'cleanup'
> + * (and variations thereof) stay balanced.
It would have been nice to avoid the fail_ variants by not increasing the
counter when the operation fails, but I suppose that's not possible given that
what return value indicates an error is operation-specific.
> + */
> +
> +#define call_memop(vb, op, args...) \
> +({ \
> + struct vb2_queue *_q = (vb)->vb2_queue; \
> + dprintk(2, "call_memop(%p, %d, %s)%s\n", \
> + _q, (vb)->v4l2_buf.index, #op, \
> + _q->mem_ops->op ? "" : " (nop)"); \
> + (vb)->cnt_mem_ ## op++; \
> + _q->mem_ops->op ? _q->mem_ops->op(args) : 0; \
> +})
> +#define fail_memop(vb, op) ((vb)->cnt_mem_ ## op--)
> +
> +#define call_qop(q, op, args...) \
> +({ \
> + dprintk(2, "call_qop(%p, %s)%s\n", q, #op, \
> + (q)->ops->op ? "" : " (nop)"); \
> + (q)->cnt_ ## op++; \
> + (q)->ops->op ? (q)->ops->op(args) : 0; \
> +})
> +#define fail_qop(q, op) ((q)->cnt_ ## op--)
> +
> +#define call_vb_qop(vb, op, args...) \
> +({ \
> + struct vb2_queue *_q = (vb)->vb2_queue; \
> + dprintk(2, "call_vb_qop(%p, %d, %s)%s\n", \
> + _q, (vb)->v4l2_buf.index, #op, \
> + _q->ops->op ? "" : " (nop)"); \
> + (vb)->cnt_ ## op++; \
> + _q->ops->op ? _q->ops->op(args) : 0; \
> +})
> +#define fail_vb_qop(vb, op) ((vb)->cnt_ ## op--)
> +
> +#else
> +
> +#define call_memop(vb, op, args...) \
> + ((vb)->vb2_queue->mem_ops->op ? (vb)->vb2_queue->mem_ops->op(args) : 0)
> +#define fail_memop(vb, op)
>
> #define call_qop(q, op, args...) \
> - (((q)->ops->op) ? ((q)->ops->op(args)) : 0)
> + ((q)->ops->op ? (q)->ops->op(args) : 0)
> +#define fail_qop(q, op)
> +
> +#define call_vb_qop(vb, op, args...) \
> + ((vb)->vb2_queue->ops->op ? (vb)->vb2_queue->ops->op(args) : 0)
> +#define fail_vb_qop(vb, op)
> +
> +#endif
>
> #define V4L2_BUFFER_MASK_FLAGS (V4L2_BUF_FLAG_MAPPED |
V4L2_BUF_FLAG_QUEUED
> | \ V4L2_BUF_FLAG_DONE | V4L2_BUF_FLAG_ERROR | \
> @@ -61,7 +112,7 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
> for (plane = 0; plane < vb->num_planes; ++plane) {
> unsigned long size = PAGE_ALIGN(q->plane_sizes[plane]);
>
> - mem_priv = call_memop(q, alloc, q->alloc_ctx[plane],
> + mem_priv = call_memop(vb, alloc, q->alloc_ctx[plane],
> size, q->gfp_flags);
> if (IS_ERR_OR_NULL(mem_priv))
> goto free;
> @@ -73,9 +124,10 @@ static int __vb2_buf_mem_alloc(struct vb2_buffer *vb)
>
> return 0;
> free:
> + fail_memop(vb, alloc);
> /* Free already allocated memory if one of the allocations failed */
> for (; plane > 0; --plane) {
> - call_memop(q, put, vb->planes[plane - 1].mem_priv);
> + call_memop(vb, put, vb->planes[plane - 1].mem_priv);
> vb->planes[plane - 1].mem_priv = NULL;
> }
>
> @@ -87,11 +139,10 @@ free:
> */
> static void __vb2_buf_mem_free(struct vb2_buffer *vb)
> {
> - struct vb2_queue *q = vb->vb2_queue;
> unsigned int plane;
>
> for (plane = 0; plane < vb->num_planes; ++plane) {
> - call_memop(q, put, vb->planes[plane].mem_priv);
> + call_memop(vb, put, vb->planes[plane].mem_priv);
> vb->planes[plane].mem_priv = NULL;
> dprintk(3, "Freed plane %d of buffer %d\n", plane,
> vb->v4l2_buf.index);
> @@ -104,12 +155,11 @@ static void __vb2_buf_mem_free(struct vb2_buffer *vb)
> */
> static void __vb2_buf_userptr_put(struct vb2_buffer *vb)
> {
> - struct vb2_queue *q = vb->vb2_queue;
> unsigned int plane;
>
> for (plane = 0; plane < vb->num_planes; ++plane) {
> if (vb->planes[plane].mem_priv)
> - call_memop(q, put_userptr, vb->planes[plane].mem_priv);
> + call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
> vb->planes[plane].mem_priv = NULL;
> }
> }
> @@ -118,15 +168,15 @@ static void __vb2_buf_userptr_put(struct vb2_buffer
> *vb) * __vb2_plane_dmabuf_put() - release memory associated with
> * a DMABUF shared plane
> */
> -static void __vb2_plane_dmabuf_put(struct vb2_queue *q, struct vb2_plane
> *p) +static void __vb2_plane_dmabuf_put(struct vb2_buffer *vb, struct
> vb2_plane *p) {
> if (!p->mem_priv)
> return;
>
> if (p->dbuf_mapped)
> - call_memop(q, unmap_dmabuf, p->mem_priv);
> + call_memop(vb, unmap_dmabuf, p->mem_priv);
>
> - call_memop(q, detach_dmabuf, p->mem_priv);
> + call_memop(vb, detach_dmabuf, p->mem_priv);
> dma_buf_put(p->dbuf);
> memset(p, 0, sizeof(*p));
> }
> @@ -137,11 +187,10 @@ static void __vb2_plane_dmabuf_put(struct vb2_queue
> *q, struct vb2_plane *p) */
> static void __vb2_buf_dmabuf_put(struct vb2_buffer *vb)
> {
> - struct vb2_queue *q = vb->vb2_queue;
> unsigned int plane;
>
> for (plane = 0; plane < vb->num_planes; ++plane)
> - __vb2_plane_dmabuf_put(q, &vb->planes[plane]);
> + __vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
> }
>
> /**
> @@ -246,10 +295,11 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum
> v4l2_memory memory, * callback, if given. An error in initialization
> * results in queue setup failure.
> */
> - ret = call_qop(q, buf_init, vb);
> + ret = call_vb_qop(vb, buf_init, vb);
> if (ret) {
> dprintk(1, "Buffer %d %p initialization"
> " failed\n", buffer, vb);
> + fail_vb_qop(vb, buf_init);
> __vb2_buf_mem_free(vb);
> kfree(vb);
> break;
> @@ -321,18 +371,77 @@ static int __vb2_queue_free(struct vb2_queue *q,
> unsigned int buffers) }
>
> /* Call driver-provided cleanup function for each buffer, if provided */
> - if (q->ops->buf_cleanup) {
> - for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
> - ++buffer) {
> - if (NULL == q->bufs[buffer])
> - continue;
> - q->ops->buf_cleanup(q->bufs[buffer]);
> - }
> + for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
> + ++buffer) {
> + if (q->bufs[buffer])
> + call_vb_qop(q->bufs[buffer], buf_cleanup,
> q->bufs[buffer]);
> }
>
> /* Release video buffer memory */
> __vb2_free_mem(q, buffers);
>
I would have put the code below in a separate function, but that's up to you.
Acked-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + /*
> + * Check that all the calls were balances during the life-time of this
> + * queue. If not (or if the debug level is 1 or up), then dump the
> + * counters to the kernel log.
> + */
> + if (q->num_buffers) {
> + bool unbalanced = q->cnt_start_streaming !=
> q->cnt_stop_streaming ||
> + q->cnt_wait_prepare != q->cnt_wait_finish;
> +
> + if (unbalanced || debug) {
> + pr_info("vb2: counters for queue %p:%s\n", q,
> + unbalanced ? " UNBALANCED!" : "");
> + pr_info("vb2: setup: %u start_streaming: %u
> stop_streaming:
%u\n",
> + q->cnt_queue_setup, q->cnt_start_streaming,
> + q->cnt_stop_streaming);
> + pr_info("vb2: wait_prepare: %u wait_finish: %u\n",
> + q->cnt_wait_prepare, q->cnt_wait_finish);
> + }
> + q->cnt_queue_setup = 0;
> + q->cnt_wait_prepare = 0;
> + q->cnt_wait_finish = 0;
> + q->cnt_start_streaming = 0;
> + q->cnt_stop_streaming = 0;
> + }
> + for (buffer = 0; buffer < q->num_buffers; ++buffer) {
> + struct vb2_buffer *vb = q->bufs[buffer];
> + bool unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put ||
> + vb->cnt_mem_prepare != vb->cnt_mem_finish ||
> + vb->cnt_mem_get_userptr !=
> vb->cnt_mem_put_userptr ||
> + vb->cnt_mem_attach_dmabuf !=
> vb->cnt_mem_detach_dmabuf ||
> + vb->cnt_mem_map_dmabuf !=
> vb->cnt_mem_unmap_dmabuf ||
> + vb->cnt_buf_queue != vb->cnt_buf_done ||
> + vb->cnt_buf_prepare != vb->cnt_buf_finish ||
> + vb->cnt_buf_init != vb->cnt_buf_cleanup;
> +
> + if (unbalanced || debug) {
> + pr_info("vb2: counters for queue %p, buffer %d:%s\n",
> + q, buffer, unbalanced ? " UNBALANCED!" : "");
> + pr_info("vb2: buf_init: %u buf_cleanup: %u
> buf_prepare: %u
> buf_finish: %u\n", + vb->cnt_buf_init,
> vb->cnt_buf_cleanup,
> + vb->cnt_buf_prepare, vb->cnt_buf_finish);
> + pr_info("vb2: buf_queue: %u buf_done: %u\n",
> + vb->cnt_buf_queue, vb->cnt_buf_done);
> + pr_info("vb2: alloc: %u put: %u prepare: %u finish:
> %u mmap:
%u\n",
> + vb->cnt_mem_alloc, vb->cnt_mem_put,
> + vb->cnt_mem_prepare, vb->cnt_mem_finish,
> + vb->cnt_mem_mmap);
> + pr_info("vb2: get_userptr: %u put_userptr: %u\n",
> + vb->cnt_mem_get_userptr,
> vb->cnt_mem_put_userptr);
> + pr_info("vb2: attach_dmabuf: %u detach_dmabuf: %u
> map_dmabuf:
%u
> unmap_dmabuf: %u\n", +
> vb->cnt_mem_attach_dmabuf,
> vb->cnt_mem_detach_dmabuf,
> + vb->cnt_mem_map_dmabuf,
> vb->cnt_mem_unmap_dmabuf);
> + pr_info("vb2: get_dmabuf: %u num_users: %u vaddr:
> %u cookie:
%u\n",
> + vb->cnt_mem_get_dmabuf,
> + vb->cnt_mem_num_users,
> + vb->cnt_mem_vaddr,
> + vb->cnt_mem_cookie);
> + }
> + }
> +#endif
> +
> /* Free videobuf buffers */
> for (buffer = q->num_buffers - buffers; buffer < q->num_buffers;
> ++buffer) {
> @@ -424,7 +533,7 @@ static bool __buffer_in_use(struct vb2_queue *q, struct
> vb2_buffer *vb) * case anyway. If num_users() returns more than 1,
> * we are not the only user of the plane's memory.
> */
> - if (mem_priv && call_memop(q, num_users, mem_priv) > 1)
> + if (mem_priv && call_memop(vb, num_users, mem_priv) > 1)
> return true;
> }
> return false;
> @@ -703,8 +812,10 @@ static int __reqbufs(struct vb2_queue *q, struct
> v4l2_requestbuffers *req) */
> ret = call_qop(q, queue_setup, q, NULL, &num_buffers, &num_planes,
> q->plane_sizes, q->alloc_ctx);
> - if (ret)
> + if (ret) {
> + fail_qop(q, queue_setup);
> return ret;
> + }
>
> /* Finally, allocate buffers and video memory */
> ret = __vb2_queue_alloc(q, req->memory, num_buffers, num_planes);
> @@ -723,6 +834,8 @@ static int __reqbufs(struct vb2_queue *q, struct
> v4l2_requestbuffers *req)
>
> ret = call_qop(q, queue_setup, q, NULL, &num_buffers,
> &num_planes, q->plane_sizes, q->alloc_ctx);
> + if (ret)
> + fail_qop(q, queue_setup);
>
> if (!ret && allocated_buffers < num_buffers)
> ret = -ENOMEM;
> @@ -803,8 +916,10 @@ static int __create_bufs(struct vb2_queue *q, struct
> v4l2_create_buffers *create */
> ret = call_qop(q, queue_setup, q, &create->format, &num_buffers,
> &num_planes, q->plane_sizes, q->alloc_ctx);
> - if (ret)
> + if (ret) {
> + fail_qop(q, queue_setup);
> return ret;
> + }
>
> /* Finally, allocate buffers and video memory */
> ret = __vb2_queue_alloc(q, create->memory, num_buffers,
> @@ -828,6 +943,8 @@ static int __create_bufs(struct vb2_queue *q, struct
> v4l2_create_buffers *create */
> ret = call_qop(q, queue_setup, q, &create->format, &num_buffers,
> &num_planes, q->plane_sizes, q->alloc_ctx);
> + if (ret)
> + fail_qop(q, queue_setup);
>
> if (!ret && allocated_buffers < num_buffers)
> ret = -ENOMEM;
> @@ -882,12 +999,10 @@ EXPORT_SYMBOL_GPL(vb2_create_bufs);
> */
> void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no)
> {
> - struct vb2_queue *q = vb->vb2_queue;
> -
> if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
> return NULL;
>
> - return call_memop(q, vaddr, vb->planes[plane_no].mem_priv);
> + return call_memop(vb, vaddr, vb->planes[plane_no].mem_priv);
>
> }
> EXPORT_SYMBOL_GPL(vb2_plane_vaddr);
> @@ -905,12 +1020,10 @@ EXPORT_SYMBOL_GPL(vb2_plane_vaddr);
> */
> void *vb2_plane_cookie(struct vb2_buffer *vb, unsigned int plane_no)
> {
> - struct vb2_queue *q = vb->vb2_queue;
> -
> if (plane_no > vb->num_planes || !vb->planes[plane_no].mem_priv)
> return NULL;
>
> - return call_memop(q, cookie, vb->planes[plane_no].mem_priv);
> + return call_memop(vb, cookie, vb->planes[plane_no].mem_priv);
> }
> EXPORT_SYMBOL_GPL(vb2_plane_cookie);
>
> @@ -938,12 +1051,19 @@ void vb2_buffer_done(struct vb2_buffer *vb, enum
> vb2_buffer_state state) if (state != VB2_BUF_STATE_DONE && state !=
> VB2_BUF_STATE_ERROR) return;
>
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + /*
> + * Although this is not a callback, it still does have to balance
> + * with the buf_queue op. So update this counter manually.
> + */
> + vb->cnt_buf_done++;
> +#endif
> dprintk(4, "Done processing on buffer %d, state: %d\n",
> vb->v4l2_buf.index, state);
>
> /* sync buffers */
> for (plane = 0; plane < vb->num_planes; ++plane)
> - call_memop(q, finish, vb->planes[plane].mem_priv);
> + call_memop(vb, finish, vb->planes[plane].mem_priv);
>
> /* Add the buffer to the done buffers list */
> spin_lock_irqsave(&q->done_lock, flags);
> @@ -1067,19 +1187,20 @@ static int __qbuf_userptr(struct vb2_buffer *vb,
> const struct v4l2_buffer *b)
>
> /* Release previously acquired memory if present */
> if (vb->planes[plane].mem_priv)
> - call_memop(q, put_userptr, vb->planes[plane].mem_priv);
> + call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
>
> vb->planes[plane].mem_priv = NULL;
> vb->v4l2_planes[plane].m.userptr = 0;
> vb->v4l2_planes[plane].length = 0;
>
> /* Acquire each plane's memory */
> - mem_priv = call_memop(q, get_userptr, q->alloc_ctx[plane],
> + mem_priv = call_memop(vb, get_userptr, q->alloc_ctx[plane],
> planes[plane].m.userptr,
> planes[plane].length, write);
> if (IS_ERR_OR_NULL(mem_priv)) {
> dprintk(1, "qbuf: failed acquiring userspace "
> "memory for plane %d\n", plane);
> + fail_memop(vb, get_userptr);
> ret = mem_priv ? PTR_ERR(mem_priv) : -EINVAL;
> goto err;
> }
> @@ -1090,9 +1211,10 @@ static int __qbuf_userptr(struct vb2_buffer *vb,
> const struct v4l2_buffer *b) * Call driver-specific initialization on the
> newly acquired buffer, * if provided.
> */
> - ret = call_qop(q, buf_init, vb);
> + ret = call_vb_qop(vb, buf_init, vb);
> if (ret) {
> dprintk(1, "qbuf: buffer initialization failed\n");
> + fail_vb_qop(vb, buf_init);
> goto err;
> }
>
> @@ -1108,7 +1230,7 @@ err:
> /* In case of errors, release planes that were already acquired */
> for (plane = 0; plane < vb->num_planes; ++plane) {
> if (vb->planes[plane].mem_priv)
> - call_memop(q, put_userptr, vb->planes[plane].mem_priv);
> + call_memop(vb, put_userptr, vb->planes[plane].mem_priv);
> vb->planes[plane].mem_priv = NULL;
> vb->v4l2_planes[plane].m.userptr = 0;
> vb->v4l2_planes[plane].length = 0;
> @@ -1173,14 +1295,15 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb,
> const struct v4l2_buffer *b) dprintk(1, "qbuf: buffer for plane %d
> changed\n", plane);
>
> /* Release previously acquired memory if present */
> - __vb2_plane_dmabuf_put(q, &vb->planes[plane]);
> + __vb2_plane_dmabuf_put(vb, &vb->planes[plane]);
> memset(&vb->v4l2_planes[plane], 0, sizeof(struct v4l2_plane));
>
> /* Acquire each plane's memory */
> - mem_priv = call_memop(q, attach_dmabuf, q->alloc_ctx[plane],
> + mem_priv = call_memop(vb, attach_dmabuf, q->alloc_ctx[plane],
> dbuf, planes[plane].length, write);
> if (IS_ERR(mem_priv)) {
> dprintk(1, "qbuf: failed to attach dmabuf\n");
> + fail_memop(vb, attach_dmabuf);
> ret = PTR_ERR(mem_priv);
> dma_buf_put(dbuf);
> goto err;
> @@ -1195,10 +1318,11 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb,
> const struct v4l2_buffer *b) * the buffer(s)..
> */
> for (plane = 0; plane < vb->num_planes; ++plane) {
> - ret = call_memop(q, map_dmabuf, vb->planes[plane].mem_priv);
> + ret = call_memop(vb, map_dmabuf, vb->planes[plane].mem_priv);
> if (ret) {
> dprintk(1, "qbuf: failed to map dmabuf for plane %d\n",
> plane);
> + fail_memop(vb, map_dmabuf);
> goto err;
> }
> vb->planes[plane].dbuf_mapped = 1;
> @@ -1208,9 +1332,10 @@ static int __qbuf_dmabuf(struct vb2_buffer *vb, const
> struct v4l2_buffer *b) * Call driver-specific initialization on the newly
> acquired buffer, * if provided.
> */
> - ret = call_qop(q, buf_init, vb);
> + ret = call_vb_qop(vb, buf_init, vb);
> if (ret) {
> dprintk(1, "qbuf: buffer initialization failed\n");
> + fail_vb_qop(vb, buf_init);
> goto err;
> }
>
> @@ -1242,9 +1367,9 @@ static void __enqueue_in_driver(struct vb2_buffer *vb)
>
> /* sync buffers */
> for (plane = 0; plane < vb->num_planes; ++plane)
> - call_memop(q, prepare, vb->planes[plane].mem_priv);
> + call_memop(vb, prepare, vb->planes[plane].mem_priv);
>
> - q->ops->buf_queue(vb);
> + call_vb_qop(vb, buf_queue, vb);
> }
>
> static int __buf_prepare(struct vb2_buffer *vb, const struct v4l2_buffer
> *b) @@ -1295,8 +1420,11 @@ static int __buf_prepare(struct vb2_buffer *vb,
> const struct v4l2_buffer *b) ret = -EINVAL;
> }
>
> - if (!ret)
> - ret = call_qop(q, buf_prepare, vb);
> + if (!ret) {
> + ret = call_vb_qop(vb, buf_prepare, vb);
> + if (ret)
> + fail_vb_qop(vb, buf_prepare);
> + }
> if (ret)
> dprintk(1, "qbuf: buffer preparation failed: %d\n", ret);
> vb->state = ret ? VB2_BUF_STATE_DEQUEUED : VB2_BUF_STATE_PREPARED;
> @@ -1393,6 +1521,8 @@ static int vb2_start_streaming(struct vb2_queue *q)
>
> /* Tell the driver to start streaming */
> ret = call_qop(q, start_streaming, q, atomic_read(&q->queued_count));
> + if (ret)
> + fail_qop(q, start_streaming);
>
> /*
> * If there are not enough buffers queued to start streaming, then
> @@ -1635,7 +1765,7 @@ static void __vb2_dqbuf(struct vb2_buffer *vb)
> for (i = 0; i < vb->num_planes; ++i) {
> if (!vb->planes[i].dbuf_mapped)
> continue;
> - call_memop(q, unmap_dmabuf, vb->planes[i].mem_priv);
> + call_memop(vb, unmap_dmabuf, vb->planes[i].mem_priv);
> vb->planes[i].dbuf_mapped = 0;
> }
> }
> @@ -1653,7 +1783,7 @@ static int vb2_internal_dqbuf(struct vb2_queue *q,
> struct v4l2_buffer *b, bool n if (ret < 0)
> return ret;
>
> - ret = call_qop(q, buf_finish, vb);
> + ret = call_vb_qop(vb, buf_finish, vb);
> if (ret) {
> dprintk(1, "dqbuf: buffer finish failed\n");
> return ret;
> @@ -1946,10 +2076,11 @@ int vb2_expbuf(struct vb2_queue *q, struct
> v4l2_exportbuffer *eb)
>
> vb_plane = &vb->planes[eb->plane];
>
> - dbuf = call_memop(q, get_dmabuf, vb_plane->mem_priv, eb->flags &
> O_ACCMODE); + dbuf = call_memop(vb, get_dmabuf, vb_plane->mem_priv,
> eb->flags & O_ACCMODE); if (IS_ERR_OR_NULL(dbuf)) {
> dprintk(1, "Failed to export buffer %d, plane %d\n",
> eb->index, eb->plane);
> + fail_memop(vb, get_dmabuf);
> return -EINVAL;
> }
>
> @@ -2041,9 +2172,11 @@ int vb2_mmap(struct vb2_queue *q, struct
> vm_area_struct *vma) return -EINVAL;
> }
>
> - ret = call_memop(q, mmap, vb->planes[plane].mem_priv, vma);
> - if (ret)
> + ret = call_memop(vb, mmap, vb->planes[plane].mem_priv, vma);
> + if (ret) {
> + fail_memop(vb, mmap);
> return ret;
> + }
>
> dprintk(3, "Buffer %d, plane %d successfully mapped\n", buffer, plane);
> return 0;
> diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h
> index bef53ce..f04eb28 100644
> --- a/include/media/videobuf2-core.h
> +++ b/include/media/videobuf2-core.h
> @@ -203,6 +203,37 @@ struct vb2_buffer {
> struct list_head done_entry;
>
> struct vb2_plane planes[VIDEO_MAX_PLANES];
> +
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + /*
> + * Counters for how often these buffer-related ops are
> + * called. Used to check for unbalanced ops.
> + */
> + u32 cnt_mem_alloc;
> + u32 cnt_mem_put;
> + u32 cnt_mem_get_dmabuf;
> + u32 cnt_mem_get_userptr;
> + u32 cnt_mem_put_userptr;
> + u32 cnt_mem_prepare;
> + u32 cnt_mem_finish;
> + u32 cnt_mem_attach_dmabuf;
> + u32 cnt_mem_detach_dmabuf;
> + u32 cnt_mem_map_dmabuf;
> + u32 cnt_mem_unmap_dmabuf;
> + u32 cnt_mem_vaddr;
> + u32 cnt_mem_cookie;
> + u32 cnt_mem_num_users;
> + u32 cnt_mem_mmap;
> +
> + u32 cnt_buf_init;
> + u32 cnt_buf_prepare;
> + u32 cnt_buf_finish;
> + u32 cnt_buf_cleanup;
> + u32 cnt_buf_queue;
> +
> + /* This counts the number of calls to vb2_buffer_done() */
> + u32 cnt_buf_done;
> +#endif
> };
>
> /**
> @@ -364,6 +395,18 @@ struct vb2_queue {
> unsigned int retry_start_streaming:1;
>
> struct vb2_fileio_data *fileio;
> +
> +#ifdef CONFIG_VIDEO_ADV_DEBUG
> + /*
> + * Counters for how often these queue-related ops are
> + * called. Used to check for unbalanced ops.
> + */
> + u32 cnt_queue_setup;
> + u32 cnt_wait_prepare;
> + u32 cnt_wait_finish;
> + u32 cnt_start_streaming;
> + u32 cnt_stop_streaming;
> +#endif
> };
>
> void *vb2_plane_vaddr(struct vb2_buffer *vb, unsigned int plane_no);
--
Regards,
Laurent Pinchart
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