From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: "Sasha Levin" <sashal@kernel.org>,
"Felix Kuehling" <Felix.Kuehling@amd.com>,
dri-devel@lists.freedesktop.org,
"Christian König" <christian.koenig@amd.com>,
"Laurent Morichetti" <laurent.morichetti@amd.com>
Subject: [PATCH AUTOSEL 5.4 11/22] drm/ttm: fix offset in VMAs with a pg_offs in ttm_bo_vm_access
Date: Wed, 19 Aug 2020 20:02:18 -0400 [thread overview]
Message-ID: <20200820000229.215333-11-sashal@kernel.org> (raw)
In-Reply-To: <20200820000229.215333-1-sashal@kernel.org>
From: Felix Kuehling <Felix.Kuehling@amd.com>
[ Upstream commit c0001213d195d1bac83e0744c06ff06dd5a8ba53 ]
VMAs with a pg_offs that's offset from the start of the vma_node need
to adjust the offset within the BO accordingly. This matches the
offset calculation in ttm_bo_vm_fault_reserved.
Signed-off-by: Felix Kuehling <Felix.Kuehling@amd.com>
Tested-by: Laurent Morichetti <laurent.morichetti@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/381169/
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/ttm/ttm_bo_vm.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ttm/ttm_bo_vm.c b/drivers/gpu/drm/ttm/ttm_bo_vm.c
index 46dc3de7e81bf..f2bad14ac04ab 100644
--- a/drivers/gpu/drm/ttm/ttm_bo_vm.c
+++ b/drivers/gpu/drm/ttm/ttm_bo_vm.c
@@ -358,8 +358,10 @@ static int ttm_bo_vm_access_kmap(struct ttm_buffer_object *bo,
static int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
void *buf, int len, int write)
{
- unsigned long offset = (addr) - vma->vm_start;
struct ttm_buffer_object *bo = vma->vm_private_data;
+ unsigned long offset = (addr) - vma->vm_start +
+ ((vma->vm_pgoff - drm_vma_node_start(&bo->base.vma_node))
+ << PAGE_SHIFT);
int ret;
if (len < 1 || (offset + len) >> PAGE_SHIFT > bo->num_pages)
--
2.25.1
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parent reply other threads:[~2020-08-20 0:02 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20200820000229.215333-1-sashal@kernel.org>]
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