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ath5k: treat RXORN as non-fatal 

We get RXORN interrupts when all receive buffers are full. This is not
necessarily a fatal situation. It can also happen when the bus is busy or the
CPU is not fast enough to process all frames.

Older chipsets apparently need a reset to come out of this situration, but on
newer chips we can treat RXORN like RX, as going thru a full reset does more
harm than good, there.

The exact chip revisions which need a reset are unknown - this guess
AR5K_SREV_AR5212 ("venice") is copied from the HAL.

Inspired by openwrt 413-rxorn.patch:
"treat rxorn like rx, reset after rxorn seems to do more harm than good"

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Bruno Randolf 2010-04-12 16:38:52 +09:00 committed by John W. Linville
parent 0edc9a6709
commit 87d77c4ef1
2 changed files with 15 additions and 1 deletions
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15
drivers/net/wireless/ath/ath5k/base.c
View File

@ -2705,7 +2705,20 @@ ath5k_intr(int irq, void *dev_id)
*/
tasklet_schedule(&sc->restq);
} else if (unlikely(status & AR5K_INT_RXORN)) {
tasklet_schedule(&sc->restq);
/*
* Receive buffers are full. Either the bus is busy or
* the CPU is not fast enough to process all received
* frames.
* Older chipsets need a reset to come out of this
* condition, but we treat it as RX for newer chips.
* We don't know exactly which versions need a reset -
* this guess is copied from the HAL.
*/
sc->stats.rxorn_intr++;
if (ah->ah_mac_srev < AR5K_SREV_AR5212)
tasklet_schedule(&sc->restq);
else
tasklet_schedule(&sc->rxtq);
} else {
if (status & AR5K_INT_SWBA) {
tasklet_hi_schedule(&sc->beacontq);

1
drivers/net/wireless/ath/ath5k/base.h
View File

@ -135,6 +135,7 @@ struct ath5k_statistics {
unsigned int beacons;
unsigned int mib_intr;
unsigned int rxorn_intr;
};
#if CHAN_DEBUG