From: Hans Verkuil Date: Wed, 29 Jan 2014 14:53:25 +0000 (-0300) Subject: [media] vb2: add debugging code to check for unbalanced ops X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=b5b4541eef8eac83f5c0d166d8e494f7c9fff202;p=linux-beck.git [media] vb2: add debugging code to check for unbalanced ops 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 Acked-by: Pawel Osciak Acked-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- diff --git a/drivers/media/v4l2-core/videobuf2-core.c b/drivers/media/v4l2-core/videobuf2-core.c index 1dc11eda85e7..917b1cbb5cbf 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. + */ + +#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 /* Flags that are set by the vb2 core */ #define V4L2_BUFFER_MASK_FLAGS (V4L2_BUF_FLAG_MAPPED | V4L2_BUF_FLAG_QUEUED | \ @@ -65,7 +116,7 @@ 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; @@ -77,9 +128,10 @@ 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; } @@ -91,11 +143,10 @@ 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); @@ -108,12 +159,11 @@ 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; } } @@ -122,15 +172,15 @@ 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)); } @@ -141,11 +191,10 @@ 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]); } /** @@ -250,10 +299,11 @@ 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; @@ -325,18 +375,77 @@ 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); +#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) { @@ -428,7 +537,7 @@ 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; @@ -716,8 +825,10 @@ 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); @@ -736,6 +847,8 @@ 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; @@ -816,8 +929,10 @@ 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, @@ -841,6 +956,8 @@ 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; @@ -895,12 +1012,10 @@ 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); @@ -918,12 +1033,10 @@ 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); @@ -951,12 +1064,19 @@ 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); @@ -1102,19 +1222,20 @@ 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; } @@ -1125,9 +1246,10 @@ 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; } @@ -1143,7 +1265,7 @@ 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; @@ -1208,14 +1330,15 @@ 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; @@ -1230,10 +1353,11 @@ 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; @@ -1243,9 +1367,10 @@ 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; } @@ -1277,9 +1402,9 @@ 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) @@ -1334,8 +1459,11 @@ 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; @@ -1432,6 +1560,8 @@ 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 @@ -1686,7 +1816,7 @@ 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; } } @@ -1704,7 +1834,7 @@ 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; @@ -2002,10 +2132,11 @@ 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; } @@ -2097,9 +2228,11 @@ 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 bf6859ee46c3..2fdb08a78b95 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 }; /** @@ -366,6 +397,18 @@ 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);