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author | David Gnedt <david.gnedt@davizone.at> | 2011-01-30 19:10:46 (GMT) |
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committer | John W. Linville <linville@tuxdriver.com> | 2011-02-03 21:42:44 (GMT) |
commit | e7332a41442bde1c14550998cadceca34c967dfc (patch) | |
tree | aa5902ac620f2fbab7d98bbdda079959b97f5bc5 /Makefile | |
parent | 172710bf8305c1b145796e34426c865480884024 (diff) | |
download | linux-fsl-qoriq-e7332a41442bde1c14550998cadceca34c967dfc.tar.xz |
wl1251: fix queue stopping/waking for TX path
The queue stopping/waking functionality was broken in a way that could
cause the TX to stall if the right circumstances are met.
The problem was caused by tx_work, which is scheduled on each TX operation.
If the firmware buffer is full, tx_work does nothing. In combinition with
stopped queues or non-continues transfers, tx_work is never scheduled again.
Moreover the low watermark introduced by
9df86e2e702c6d5547aced7f241addd2d698bb11 never takes effect because of some
old code.
Solve this by scheduling tx_work every time tx_queue is non-empty and
firmware buffer is freed on tx_complete.
This also solves a possible but unlikely case: If less frames than the high
watermark are queued, but more than firmware buffer can hold. This results
in queues staying awake but the only scheduled tx_work doesn't transfer all
frames, so the remaining frames are stuck in the queue until more frames
get queued and tx_work is scheduled again.
Signed-off-by: David Gnedt <david.gnedt@davizone.at>
Acked-by: Kalle Valo <kvalo@adurom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions