lkml.org 
[lkml]   [2015]   [May]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 15/22] iommu/amd: Use default domain if available for DMA-API
Date
From: Joerg Roedel <jroedel@suse.de>

Signed-off-by: Joerg Roedel <jroedel@suse.de>
---
drivers/iommu/amd_iommu.c | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 9da3f0e..dc8e44b 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2495,12 +2495,19 @@ void amd_iommu_init_notifier(void)
static struct protection_domain *get_domain(struct device *dev)
{
struct protection_domain *domain;
+ struct iommu_domain *io_domain;
struct dma_ops_domain *dma_dom;
u16 devid = get_device_id(dev);

if (!check_device(dev))
return ERR_PTR(-EINVAL);

+ io_domain = iommu_get_domain_for_dev(dev);
+ if (io_domain) {
+ domain = to_pdomain(io_domain);
+ return domain;
+ }
+
domain = domain_for_device(dev);
if (domain != NULL && !dma_ops_domain(domain))
return ERR_PTR(-EBUSY);
--
1.9.1


\
 
 \ /
  Last update: 2015-05-28 19:21    [W:0.217 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site