lkml.org 
[lkml]   [2014]   [Oct]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v4 4/7] xen/arm: use is_dma_coherent
Date
Use is_dma_coherent to check whether we need to issue cache maintenance
operations rather than checking on the existence of a particular
dma_ops function for the device.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
---
arch/arm/xen/mm32.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/xen/mm32.c b/arch/arm/xen/mm32.c
index 6153d61..c7fa673 100644
--- a/arch/arm/xen/mm32.c
+++ b/arch/arm/xen/mm32.c
@@ -76,7 +76,7 @@ void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
struct dma_attrs *attrs)

{
- if (!__generic_dma_ops(hwdev)->unmap_page)
+ if (is_dma_coherent(hwdev))
return;
if (dma_get_attr(DMA_ATTR_SKIP_CPU_SYNC, attrs))
return;
@@ -87,7 +87,7 @@ void xen_dma_unmap_page(struct device *hwdev, dma_addr_t handle,
void xen_dma_sync_single_for_cpu(struct device *hwdev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
- if (!__generic_dma_ops(hwdev)->sync_single_for_cpu)
+ if (is_dma_coherent(hwdev))
return;
__xen_dma_page_dev_to_cpu(hwdev, handle, size, dir);
}
@@ -95,7 +95,7 @@ void xen_dma_sync_single_for_cpu(struct device *hwdev,
void xen_dma_sync_single_for_device(struct device *hwdev,
dma_addr_t handle, size_t size, enum dma_data_direction dir)
{
- if (!__generic_dma_ops(hwdev)->sync_single_for_device)
+ if (is_dma_coherent(hwdev))
return;
__xen_dma_page_cpu_to_dev(hwdev, handle, size, dir);
}
--
1.7.10.4


\
 
 \ /
  Last update: 2014-10-10 14:22    [W:0.154 / U:0.400 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site