diff options
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-udma.c')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-udma.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/media/video/ivtv/ivtv-udma.c b/drivers/media/video/ivtv/ivtv-udma.c index 5592abbe14e..7e503adacea 100644 --- a/drivers/media/video/ivtv/ivtv-udma.c +++ b/drivers/media/video/ivtv/ivtv-udma.c @@ -40,6 +40,9 @@ int ivtv_udma_fill_sg_list (struct ivtv_user_dma *dma, struct ivtv_dma_page_info int i, offset; unsigned long flags; + if (map_offset < 0) + return map_offset; + offset = dma_page->offset; /* Fill SG Array with new values */ @@ -55,7 +58,7 @@ int ivtv_udma_fill_sg_list (struct ivtv_user_dma *dma, struct ivtv_dma_page_info if (dma->bouncemap[map_offset] == NULL) dma->bouncemap[map_offset] = alloc_page(GFP_KERNEL); if (dma->bouncemap[map_offset] == NULL) - return -ENOMEM; + return -1; local_irq_save(flags); src = kmap_atomic(dma->map[map_offset], KM_BOUNCE_READ) + offset; memcpy(page_address(dma->bouncemap[map_offset]) + offset, src, len); @@ -69,7 +72,7 @@ int ivtv_udma_fill_sg_list (struct ivtv_user_dma *dma, struct ivtv_dma_page_info offset = 0; map_offset++; } - return 0; + return map_offset; } void ivtv_udma_fill_sg_array (struct ivtv_user_dma *dma, u32 buffer_offset, u32 buffer_offset_2, u32 split) { @@ -138,13 +141,12 @@ int ivtv_udma_setup(struct ivtv *itv, unsigned long ivtv_dest_addr, dma->page_count = user_dma.page_count; /* Fill SG List with new values */ - err = ivtv_udma_fill_sg_list(dma, &user_dma, 0); - if (err) { + if (ivtv_udma_fill_sg_list(dma, &user_dma, 0) < 0) { for (i = 0; i < dma->page_count; i++) { put_page(dma->map[i]); } dma->page_count = 0; - return err; + return -ENOMEM; } /* Map SG List */ |