ath9k: fix stopping tx dma on reset

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In some situations, stopping Tx DMA frequently fails, leading to messages
like this:

ath: Failed to stop TX DMA in 100 msec after killing last frame
ath: Failed to stop TX DMA!

This patch uses a few MAC features to abort DMA globally instead of iterating
over all hardware queues and attempting to stop them individually.
Not only is that faster and works with a shorter timeout, it also makes the
process much more reliable.

With this change, I can no longer trigger these messages on AR9380,
and on AR9280 they become much more rare.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

...

This commit is contained in:

Felix Fietkau 2011-03-11 21:38:18 +01:00 • committed by John W. Linville

parent 997941d7ef

commit 0d51cccc24

3 changed files with 35 additions and 8 deletions

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28

drivers/net/wireless/ath/ath9k/mac.c

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1

drivers/net/wireless/ath/ath9k/mac.h

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14

drivers/net/wireless/ath/ath9k/xmit.c

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