A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-29 19:21:31 -04:00
Code Issues Projects Releases Packages Wiki Activity

[media] media: vb2 dma-sg: Fully cache synchronise buffers in prepare and finish

Browse source 
In videobuf2 dma-sg memory types the prepare and finish ops, instead
of passing the number of entries in the original scatterlist as the
"nents" parameter to dma_sync_sg_for_device() and dma_sync_sg_for_cpu(),
the value returned by dma_map_sg() was used. Albeit this has been
suggested in comments of some implementations (which have since been
corrected), this is wrong.

Fixes: d790b7eda9 ("vb2-dma-sg: move dma_(un)map_sg here")

Cc: [email protected] # for v3.19 and up
Signed-off-by: Tiffany Lin <[email protected]>
Signed-off-by: Sakari Ailus <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Tiffany Lin 2015-09-24 06:02:36 -03:00 • committed by Mauro Carvalho Chehab
commit 418dae2276
1 changed files with 3 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

5
drivers/media/v4l2-core/videobuf2-dma-sg.c
View file

@ -210,7 +210,8 @@ static void vb2_dma_sg_prepare(void *buf_priv)
if (buf->db_attach)
return;
dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
dma_sync_sg_for_device(buf->dev, sgt->sgl, sgt->orig_nents,
buf->dma_dir);
}
static void vb2_dma_sg_finish(void *buf_priv)
@ -222,7 +223,7 @@ static void vb2_dma_sg_finish(void *buf_priv)
if (buf->db_attach)
return;
dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->nents, buf->dma_dir);
dma_sync_sg_for_cpu(buf->dev, sgt->sgl, sgt->orig_nents, buf->dma_dir);
}
static void *vb2_dma_sg_get_userptr(void *alloc_ctx, unsigned long vaddr,