On Wed, May 7, 2014 at 4:35 PM, <j.glisse@xxxxxxxxx> wrote: > From: Jérôme Glisse <jglisse@xxxxxxxxxx> > > 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@xxxxxxxxxxxxxxx> > Signed-off-by: Jérôme Glisse <jglisse@xxxxxxxxxx> Probably also fixes: https://bugzilla.kernel.org/show_bug.cgi?id=73931 Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx> > --- > drivers/gpu/drm/radeon/radeon_kms.c | 55 +++++++++++++++++++------------------ > 1 file changed, 29 insertions(+), 26 deletions(-) > > diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c > index 0cc47f1..eaaedba 100644 > --- a/drivers/gpu/drm/radeon/radeon_kms.c > +++ b/drivers/gpu/drm/radeon/radeon_kms.c > @@ -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); > + /* 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; > + 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); > -- > 1.9.0 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
