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habanalabs: Correct handling when failing to enqueue CB

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The fence release flow is different if the CS was never submitted. In that
case, we don't have an hw_sob object attached that we need to "put". While
if the CS was aborted, we do need to "put" the hw_sob.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
This commit is contained in:
Ofir Bitton 2020-06-11 11:43:23 +03:00 committed by Oded Gabbay
parent 647e835e67
commit 3292055c85
1 changed files with 13 additions and 0 deletions
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13
drivers/misc/habanalabs/command_submission.c
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@ -62,6 +62,12 @@ static void hl_fence_release(struct dma_fence *fence)
container_of(fence, struct hl_cs_compl, base_fence);
struct hl_device *hdev = hl_cs_cmpl->hdev;
/* EBUSY means the CS was never submitted and hence we don't have
* an attached hw_sob object that we should handle here
*/
if (fence->error == -EBUSY)
goto free;
if ((hl_cs_cmpl->type == CS_TYPE_SIGNAL) ||
(hl_cs_cmpl->type == CS_TYPE_WAIT)) {
@ -92,6 +98,7 @@ static void hl_fence_release(struct dma_fence *fence)
kref_put(&hl_cs_cmpl->hw_sob->kref, hl_sob_reset);
}
free:
kfree_rcu(hl_cs_cmpl, base_fence.rcu);
}
@ -328,10 +335,16 @@ static void cs_do_release(struct kref *ref)
hl_ctx_put(cs->ctx);
/* We need to mark an error for not submitted because in that case
* the dma fence release flow is different. Mainly, we don't need
* to handle hw_sob for signal/wait
*/
if (cs->timedout)
dma_fence_set_error(cs->fence, -ETIMEDOUT);
else if (cs->aborted)
dma_fence_set_error(cs->fence, -EIO);
else if (!cs->submitted)
dma_fence_set_error(cs->fence, -EBUSY);
dma_fence_signal(cs->fence);
dma_fence_put(cs->fence);