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| author | Mathias Nyman <[email protected]> | 2025-05-05 12:56:30 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2025-05-05 14:30:45 +0000 |
| commit | cab63934c33b12c0d1e9f4da7450928057f2c142 (patch) | |
| tree | 10da2a15dc4258b4a9699df9715d3050f55c16b9 /rust/helpers/mutex.c | |
| parent | usb: xhci: Don't trust the EP Context cycle bit when moving HW dequeue (diff) | |
| download | kernel-cab63934c33b12c0d1e9f4da7450928057f2c142.tar.gz kernel-cab63934c33b12c0d1e9f4da7450928057f2c142.zip | |
xhci: dbc: Avoid event polling busyloop if pending rx transfers are inactive.
Event polling delay is set to 0 if there are any pending requests in
either rx or tx requests lists. Checking for pending requests does
not work well for "IN" transfers as the tty driver always queues
requests to the list and TRBs to the ring, preparing to receive data
from the host.
This causes unnecessary busylooping and cpu hogging.
Only set the event polling delay to 0 if there are pending tx "write"
transfers, or if it was less than 10ms since last active data transfer
in any direction.
Cc: Łukasz Bartosik <[email protected]>
Fixes: fb18e5bb9660 ("xhci: dbc: poll at different rate depending on data transfer activity")
Cc: [email protected]
Signed-off-by: Mathias Nyman <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'rust/helpers/mutex.c')
0 files changed, 0 insertions, 0 deletions