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| author | Arik Nemtsov <arik@wizery.com> | 2011-02-22 23:22:24 +0100 |
|---|---|---|
| committer | Luciano Coelho <coelho@ti.com> | 2011-02-23 10:14:55 +0100 |
| commit | f4d08ddd3e60c79a141be36a5f3a7294c619291d (patch) | |
| tree | 4b0289650beaa14e2f7c9ea7a66217a71d6cfbc5 /drivers/net/wireless/wl12xx/tx.c | |
| parent | wl12xx: always set mac_address when configuring ht caps (diff) | |
| download | linux-f4d08ddd3e60c79a141be36a5f3a7294c619291d.tar.xz linux-f4d08ddd3e60c79a141be36a5f3a7294c619291d.zip | |
wl12xx: fix potential race condition with TX queue watermark
Check the conditions for the high/low TX queue watermarks when the
spin-lock is taken. This prevents race conditions as tx_queue_count and
the flag checked are only modified when the spin-lock is taken.
The following race was in mind:
- Queues are almost full and wl1271_op_tx() will stop the queues, but it
doesn't get the spin-lock yet.
- (on another CPU) tx_work_locked() dequeues 15 skbs from this queue and
tx_queue_count is updated to reflect this
- wl1271_op_tx() does not check tx_queue_count after taking the
spin-lock and incorrectly stops the queue.
Signed-off-by: Arik Nemtsov <arik@wizery.com>
Signed-off-by: Luciano Coelho <coelho@ti.com>
Diffstat (limited to 'drivers/net/wireless/wl12xx/tx.c')
0 files changed, 0 insertions, 0 deletions