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habanalabs: check TPC vector pipe is empty 

The driver waits for the TPC vector pipe to be empty before checking if the
TPC kernel has finished executing, but the code doesn't validate that the
pipe was indeed empty, it just wait for it without checking the return
value.

Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Tomer Tayar <ttayar@habana.ai>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Oded Gabbay 2020-08-12 11:28:13 +03:00
parent 0358372bbe
commit 31ac1f1a57
1 changed files with 9 additions and 0 deletions
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9
drivers/misc/habanalabs/gaudi/gaudi.c
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@ -6304,6 +6304,15 @@ static int gaudi_run_tpc_kernel(struct hl_device *hdev, u64 tpc_kernel,
1000,
kernel_timeout);
if (rc) {
dev_err(hdev->dev,
"Timeout while waiting for TPC%d vector pipe\n",
tpc_id);
hdev->asic_funcs->set_clock_gating(hdev);
mutex_unlock(&gaudi->clk_gate_mutex);
return -EIO;
}
rc = hl_poll_timeout(
hdev,
mmTPC0_CFG_WQ_INFLIGHT_CNTR + offset,