This is a note to let you know that I've just added the patch titled
[media] vb2: Fix dma_dir setting for dma-contig mem type
to the 3.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
vb2-fix-dma_dir-setting-for-dma-contig-mem-type.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 4879785ed511083676f27a016c9ad6c46c8e5737 Mon Sep 17 00:00:00 2001
From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Date: Fri, 13 Feb 2015 04:42:37 -0300
Subject: [media] vb2: Fix dma_dir setting for dma-contig mem type
From: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
commit 4879785ed511083676f27a016c9ad6c46c8e5737 upstream.
The last argument of vb2_dc_get_user_pages() is of type enum
dma_data_direction, but the caller, vb2_dc_get_userptr() passes a value
which is the result of comparison dma_dir == DMA_FROM_DEVICE. This results
in the write parameter to get_user_pages() being zero in all cases, i.e.
that the caller has no intent to write there.
This was broken by patch "vb2: replace 'write' by 'dma_dir'".
Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
Signed-off-by: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/media/v4l2-core/videobuf2-dma-contig.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -632,8 +632,7 @@ static void *vb2_dc_get_userptr(void *al
}
/* extract page list from userspace mapping */
- ret = vb2_dc_get_user_pages(start, pages, n_pages, vma,
- dma_dir == DMA_FROM_DEVICE);
+ ret = vb2_dc_get_user_pages(start, pages, n_pages, vma, dma_dir);
if (ret) {
unsigned long pfn;
if (vb2_dc_get_user_pfn(start, n_pages, vma, &pfn) == 0) {
Patches currently in stable-queue which might be from sakari.ailus@xxxxxxxxxxxxxxx are
queue-3.19/vb2-fix-dma_dir-setting-for-dma-contig-mem-type.patch
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