[PATCH 04/11] accel/ivpu: Clear CDTAB entry in case of failure

[Jacek Lawrynowicz]

From: Karol Wachowski <karol.wachowski at intel.com>

Don't leave a context descriptor in case CFGI_ALL flush fails.
Mark it as invalid (by clearing valid bit) so nothing is left in
partially-initialized state.

Signed-off-by: Karol Wachowski <karol.wachowski at intel.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz at linux.intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz at linux.intel.com>
---
 drivers/accel/ivpu/ivpu_mmu.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/accel/ivpu/ivpu_mmu.c b/drivers/accel/ivpu/ivpu_mmu.c
index 4ff0d7a519859..26ef52fbb93e5 100644
--- a/drivers/accel/ivpu/ivpu_mmu.c
+++ b/drivers/accel/ivpu/ivpu_mmu.c
@@ -749,10 +749,17 @@ static int ivpu_mmu_cdtab_entry_set(struct ivpu_device *vdev, u32 ssid, u64 cd_d
 
 	ret = ivpu_mmu_cmdq_write_cfgi_all(vdev);
 	if (ret)
-		goto unlock;
+		goto err_invalidate;
 
 	ret = ivpu_mmu_cmdq_sync(vdev);
+	if (ret)
+		goto err_invalidate;
 unlock:
+	mutex_unlock(&mmu->lock);
+	return 0;
+
+err_invalidate:
+	WRITE_ONCE(entry[0], 0);
 	mutex_unlock(&mmu->lock);
 	return ret;
 }
-- 
2.45.1