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V4L/DVB (6060): ivtv: fix IVTV_IOC_DMA_FRAME bug introduced by highmem bugfix

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The return value of ivtv_udma_fill_sg_list() was changed by the
highmem bugfix, but that return value was still used in ivtv-yuv.c.

Revert to the old return value, but in addition return -1 in case of
a memory allocation error.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Hans Verkuil 2007-08-19 17:56:41 -03:00 committed by Mauro Carvalho Chehab
parent 25e3f8f40e
commit 8beb058f1e
2 changed files with 8 additions and 6 deletions
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12
drivers/media/video/ivtv/ivtv-udma.c
View File

@ -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 */

2
drivers/media/video/ivtv/ivtv-yuv.c
View File

@ -83,7 +83,7 @@ static int ivtv_yuv_prep_user_dma(struct ivtv *itv, struct ivtv_user_dma *dma,
}
/* Fill & map SG List */
if (ivtv_udma_fill_sg_list (dma, &uv_dma, ivtv_udma_fill_sg_list (dma, &y_dma, 0))) {
if (ivtv_udma_fill_sg_list (dma, &uv_dma, ivtv_udma_fill_sg_list (dma, &y_dma, 0)) < 0) {
IVTV_DEBUG_WARN("could not allocate bounce buffers for highmem userspace buffers\n");
for (i = 0; i < dma->page_count; i++) {
put_page(dma->map[i]);