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author | Ohad Sharabi <osharabi@habana.ai> | 2021-12-20 14:30:35 +0300 |
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committer | Oded Gabbay <ogabbay@kernel.org> | 2021-12-26 15:40:25 +0300 |
commit | 60bf3bfb5a37965fc33fa00f19a2074dd48077c5 (patch) | |
tree | c3a5eeb7a88064c798efa56c3fb4d231b6d233a7 /drivers/virtio | |
parent | f297a0e9fe7d4b4d8a24d2ce97446f2faaf9d51b (diff) | |
download | linux-60bf3bfb5a37965fc33fa00f19a2074dd48077c5.tar.xz |
habanalabs: handle skip multi-CS if handling not done
This patch fixes issue in which we have timeout for multi-CS although
the CS in the list actually completed.
Example scenario (the two threads marked as WAIT for the thread that
handles the wait_for_multi_cs and CMPL as the thread that signal
completion for both CS and multi-CS):
1. Submit CS with sequence X
2. [WAIT]: call wait_for_multi_cs with single CS X
3. [CMPL]: CS X do invoke complete_all for both CS and multi-CS
(multi_cs_completion_done still false)
4. [WAIT]: enter poll_fences, reinit the completion and find the CS
as completed when asking on the fence but multi_cs_done is
still false it returns that no CS actually completed
5. [CMPL]: set multi_cs_handling_done as true
6. [WAIT]: wait for completion but no CS to awake the wait context
and hence wait till timeout
Solution: if CS detected as completed in poll_fences but multi_cs_done
is still false invoke complete_all to the multi-CS completion
and so it will not go to sleep in wait_for_completion but
rather will have a "second chance" to wait for
multi_cs_completion_done.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Diffstat (limited to 'drivers/virtio')
0 files changed, 0 insertions, 0 deletions