diff options
Diffstat (limited to 'drivers/media/common/videobuf2/videobuf2-core.c')
-rw-r--r-- | drivers/media/common/videobuf2/videobuf2-core.c | 25 |
1 files changed, 16 insertions, 9 deletions
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 8ff8722cb6b1..70e8c3366f9c 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -679,11 +679,9 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * are not in use and can be freed. */ mutex_lock(&q->mmap_lock); - if (q->memory == VB2_MEMORY_MMAP && __buffers_in_use(q)) { - mutex_unlock(&q->mmap_lock); - dprintk(1, "memory in use, cannot free\n"); - return -EBUSY; - } + if (debug && q->memory == VB2_MEMORY_MMAP && + __buffers_in_use(q)) + dprintk(1, "memory in use, orphaning buffers\n"); /* * Call queue_cancel to clean up any buffers in the @@ -812,6 +810,9 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, memset(q->alloc_devs, 0, sizeof(q->alloc_devs)); q->memory = memory; q->waiting_for_buffers = !q->is_output; + } else if (q->memory != memory) { + dprintk(1, "memory model mismatch\n"); + return -EINVAL; } num_buffers = min(*count, VB2_MAX_FRAME - q->num_buffers); @@ -2143,9 +2144,13 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) return -EINVAL; } } + + mutex_lock(&q->mmap_lock); + if (vb2_fileio_is_active(q)) { dprintk(1, "mmap: file io in progress\n"); - return -EBUSY; + ret = -EBUSY; + goto unlock; } /* @@ -2153,7 +2158,7 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) */ ret = __find_plane_by_offset(q, off, &buffer, &plane); if (ret) - return ret; + goto unlock; vb = q->bufs[buffer]; @@ -2166,11 +2171,13 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) if (length < (vma->vm_end - vma->vm_start)) { dprintk(1, "MMAP invalid, as it would overflow buffer length\n"); - return -EINVAL; + ret = -EINVAL; + goto unlock; } - mutex_lock(&q->mmap_lock); ret = call_memop(vb, mmap, vb->planes[plane].mem_priv, vma); + +unlock: mutex_unlock(&q->mmap_lock); if (ret) return ret; |