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drm/radeon: fix regression in UMS CS ioctl 

radeon_cs_parser_init is called by both the legacy UMS
CS ioctl and the KMS CS ioctl.  Protect KMS specific
pieces of the code by checking that rdev is not NULL.

Reported-by: Michael Burian <michael.burian@sbg.at>

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Jerome Glisse <jglisse@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Alex Deucher 2012-05-30 10:09:30 -04:00 committed by Dave Airlie
parent 0824db38e5
commit 9b00147d9f
1 changed files with 18 additions and 15 deletions
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33
drivers/gpu/drm/radeon/radeon_cs.c
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@ -147,6 +147,7 @@ static int radeon_cs_sync_rings(struct radeon_cs_parser *p)
sync_to_ring, p->ring);
}
/* XXX: note that this is called from the legacy UMS CS ioctl as well */
int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
{
struct drm_radeon_cs *cs = data;
@ -245,23 +246,25 @@ int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data)
}
}
if ((p->cs_flags & RADEON_CS_USE_VM) &&
!p->rdev->vm_manager.enabled) {
DRM_ERROR("VM not active on asic!\n");
return -EINVAL;
/* these are KMS only */
if (p->rdev) {
if ((p->cs_flags & RADEON_CS_USE_VM) &&
!p->rdev->vm_manager.enabled) {
DRM_ERROR("VM not active on asic!\n");
return -EINVAL;
}
/* we only support VM on SI+ */
if ((p->rdev->family >= CHIP_TAHITI) &&
((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
DRM_ERROR("VM required on SI+!\n");
return -EINVAL;
}
if (radeon_cs_get_ring(p, ring, priority))
return -EINVAL;
}
/* we only support VM on SI+ */
if ((p->rdev->family >= CHIP_TAHITI) &&
((p->cs_flags & RADEON_CS_USE_VM) == 0)) {
DRM_ERROR("VM required on SI+!\n");
return -EINVAL;
}
if (radeon_cs_get_ring(p, ring, priority))
return -EINVAL;
/* deal with non-vm */
if ((p->chunk_ib_idx != -1) &&
((p->cs_flags & RADEON_CS_USE_VM) == 0) &&