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From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: linux-media@vger.kernel.org
Cc: dri-devel@lists.freedesktop.org, posciak@chromium.org,
	m.szyprowski@samsung.com, kyungmin.park@samsung.com,
	hverkuil@xs4all.nl, sumit.semwal@linaro.org, robdclark@gmail.com,
	daniel.vetter@ffwll.ch, labbott@redhat.com
Subject: [RFC v3 06/14] vb2: dma-contig: Assign DMA attrs for a buffer unconditionally
Date: Thu, 13 Apr 2017 10:57:11 +0300	[thread overview]
Message-ID: <1492070239-21532-7-git-send-email-sakari.ailus@linux.intel.com> (raw)
In-Reply-To: <1492070239-21532-1-git-send-email-sakari.ailus@linux.intel.com>

attrs used to be a pointer and the caller of vb2_dc_alloc() could
optionally provide it, or NULL. This was when struct dma_attrs was used
to describe DMA attributes rather than an unsigned long value. There is no
longer a need to maintain the condition, assign the value unconditionally.
There is no functional difference because the memory was initialised to
zero anyway.

Fixes: 00085f1e ("dma-mapping: use unsigned long for dma_attrs")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
 drivers/media/v4l2-core/videobuf2-dma-contig.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/media/v4l2-core/videobuf2-dma-contig.c b/drivers/media/v4l2-core/videobuf2-dma-contig.c
index 30082a4..a8a46a8 100644
--- a/drivers/media/v4l2-core/videobuf2-dma-contig.c
+++ b/drivers/media/v4l2-core/videobuf2-dma-contig.c
@@ -149,8 +149,7 @@ static void *vb2_dc_alloc(struct device *dev, unsigned long attrs,
 	if (!buf)
 		return ERR_PTR(-ENOMEM);
 
-	if (attrs)
-		buf->attrs = attrs;
+	buf->attrs = attrs;
 	buf->cookie = dma_alloc_attrs(dev, size, &buf->dma_addr,
 					GFP_KERNEL | gfp_flags, buf->attrs);
 	if (!buf->cookie) {
-- 
2.7.4

  parent reply	other threads:[~2017-04-13  7:57 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-13  7:57 [RFC v3 00/14] vb2: Handle user cache hints, allow drivers to choose cache coherency Sakari Ailus
2017-04-13  7:57 ` [RFC v3 01/14] vb2: Rename confusingly named internal buffer preparation functions Sakari Ailus
2017-04-13  7:57 ` [RFC v3 02/14] vb2: Move buffer cache synchronisation to prepare from queue Sakari Ailus
2017-04-13  7:57 ` [RFC v3 03/14] vb2: Move cache synchronisation from buffer done to dqbuf handler Sakari Ailus
2017-04-13  7:57 ` [RFC v3 04/14] v4l: Unify cache management hint buffer flags Sakari Ailus
2017-04-13  7:57 ` [RFC v3 05/14] vb2: Anticipate queue specific DMA attributes for USERPTR buffers Sakari Ailus
2017-04-13 15:09   ` [RFC v3.1 " Sakari Ailus
2017-04-13  7:57 ` Sakari Ailus [this message]
2017-04-13  7:57 ` [RFC v3 07/14] vb2: dma-contig: Remove redundant sgt_base field Sakari Ailus
2017-04-13  7:57 ` [RFC v3 08/14] vb2: dma-contig: Don't warn on failure in obtaining scatterlist Sakari Ailus
2017-04-13  7:57 ` [RFC v3 09/14] vb2: dma-contig: Move vb2_dc_get_base_sgt() up Sakari Ailus
2017-04-13  7:57 ` [RFC v3 10/14] vb2: dma-contig: Fix DMA attribute and cache management Sakari Ailus
2017-04-13  7:57 ` [RFC v3 11/14] vb2: dma-contig: Add WARN_ON_ONCE() to check for potential bugs Sakari Ailus
2017-04-13  7:57 ` [RFC v3 12/14] vb2: dma-sg: Let drivers decide DMA attrs of MMAP and USERPTR bufs Sakari Ailus
2017-04-13  7:57 ` [RFC v3 13/14] vb2: Don't sync cache for a buffer if so requested Sakari Ailus
2017-04-13  7:57 ` [RFC v3 14/14] vb2: Improve struct vb2_mem_ops documentation; alloc and put are for MMAP Sakari Ailus

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