diff options
Diffstat (limited to 'drivers/media/platform/vsp1')
| -rw-r--r-- | drivers/media/platform/vsp1/vsp1_dl.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/media/platform/vsp1/vsp1_dl.c b/drivers/media/platform/vsp1/vsp1_dl.c index 083da4f05c20..51965c30dec2 100644 --- a/drivers/media/platform/vsp1/vsp1_dl.c +++ b/drivers/media/platform/vsp1/vsp1_dl.c @@ -46,6 +46,7 @@ struct vsp1_dl_entry { * @dma: DMA address of the entries * @size: size of the DMA memory in bytes * @num_entries: number of stored entries + * @max_entries: number of entries available */ struct vsp1_dl_body { struct list_head list; @@ -56,6 +57,7 @@ struct vsp1_dl_body { size_t size; unsigned int num_entries; + unsigned int max_entries; }; /** @@ -138,6 +140,7 @@ static int vsp1_dl_body_init(struct vsp1_device *vsp1, dlb->vsp1 = vsp1; dlb->size = size; + dlb->max_entries = num_entries; dlb->entries = dma_alloc_wc(vsp1->bus_master, dlb->size, &dlb->dma, GFP_KERNEL); @@ -219,6 +222,10 @@ void vsp1_dl_body_free(struct vsp1_dl_body *dlb) */ void vsp1_dl_body_write(struct vsp1_dl_body *dlb, u32 reg, u32 data) { + if (WARN_ONCE(dlb->num_entries >= dlb->max_entries, + "DLB size exceeded (max %u)", dlb->max_entries)) + return; + dlb->entries[dlb->num_entries].addr = reg; dlb->entries[dlb->num_entries].data = data; dlb->num_entries++; |