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drm/amdkfd: unmap VMID<-->PASID when relesing VMID (non-HWS) 

This patch fixes a bug where deallocate_vmid() didn't actually unmap the
VMID<-->PASID mapping (in the registers).
That can cause undefined behavior.

This bug only occurs in non-HWS mode.

Signed-off-by: Ben Goz <ben.goz@amd.com>
Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ben Goz 2015-01-05 15:48:28 +02:00 committed by Oded Gabbay
parent fec77bb50f
commit 2030664b70
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
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@ -161,6 +161,9 @@ static void deallocate_vmid(struct device_queue_manager *dqm,
{
int bit = qpd->vmid - KFD_VMID_START_OFFSET;
/* Release the vmid mapping */
set_pasid_vmid_mapping(dqm, 0, qpd->vmid);
set_bit(bit, (unsigned long *)&dqm->vmid_bitmap);
qpd->vmid = 0;
q->properties.vmid = 0;