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drm/radeon: avoid segfault on device open when accel is not working. 

When accel is not working on device with virtual address space radeon
segfault because the ib buffer is NULL and trying to map it inside the
virtual address space trigger segfault. This patch only map the ib
buffer if accel is working.

Cc: <stable@vger.kernel.org>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Jérôme Glisse 2014-05-07 16:35:24 -04:00 committed by Christian König
parent 74ad54f249
commit 24f47acc78
1 changed files with 31 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

59
drivers/gpu/drm/radeon/radeon_kms.c
View File

@ -577,28 +577,29 @@ int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
return r;
}
r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
if (r) {
radeon_vm_fini(rdev, &fpriv->vm);
kfree(fpriv);
return r;
if (rdev->accel_working) {
r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
if (r) {
radeon_vm_fini(rdev, &fpriv->vm);
kfree(fpriv);
return r;
}
/* map the ib pool buffer read only into
* virtual address space */
bo_va = radeon_vm_bo_add(rdev, &fpriv->vm,
rdev->ring_tmp_bo.bo);
r = radeon_vm_bo_set_addr(rdev, bo_va, RADEON_VA_IB_OFFSET,
RADEON_VM_PAGE_READABLE |
RADEON_VM_PAGE_SNOOPED);
radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
if (r) {
radeon_vm_fini(rdev, &fpriv->vm);
kfree(fpriv);
return r;
}
}
/* map the ib pool buffer read only into
* virtual address space */
bo_va = radeon_vm_bo_add(rdev, &fpriv->vm,
rdev->ring_tmp_bo.bo);
r = radeon_vm_bo_set_addr(rdev, bo_va, RADEON_VA_IB_OFFSET,
RADEON_VM_PAGE_READABLE |
RADEON_VM_PAGE_SNOOPED);
radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
if (r) {
radeon_vm_fini(rdev, &fpriv->vm);
kfree(fpriv);
return r;
}
file_priv->driver_priv = fpriv;
}
@ -626,13 +627,15 @@ void radeon_driver_postclose_kms(struct drm_device *dev,
struct radeon_bo_va *bo_va;
int r;
r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
if (!r) {
bo_va = radeon_vm_bo_find(&fpriv->vm,
rdev->ring_tmp_bo.bo);
if (bo_va)
radeon_vm_bo_rmv(rdev, bo_va);
radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
if (rdev->accel_working) {
r = radeon_bo_reserve(rdev->ring_tmp_bo.bo, false);
if (!r) {
bo_va = radeon_vm_bo_find(&fpriv->vm,
rdev->ring_tmp_bo.bo);
if (bo_va)
radeon_vm_bo_rmv(rdev, bo_va);
radeon_bo_unreserve(rdev->ring_tmp_bo.bo);
}
}
radeon_vm_fini(rdev, &fpriv->vm);