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ath9k: do not link receive buffers during flush

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On AR9300 the rx FIFO needs to be empty during reset to ensure that no
further DMA activity is generated, otherwise it might lead to memory
corruption issues.

Cc: stable@vger.kernel.org
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Felix Fietkau 2013-01-09 16:16:52 +01:00 • committed by John W. Linville
parent 0981c3b24e
commit a3dc48e82b
1 changed files with 6 additions and 4 deletions

10
drivers/net/wireless/ath/ath9k/recv.c
View file

@ -744,6 +744,7 @@ static struct ath_buf *ath_get_next_rx_buf(struct ath_softc *sc,
return NULL;
}
list_del(&bf->list);
if (!bf->bf_mpdu)
return bf;
@ -1254,14 +1255,15 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
sc->rx.frag = NULL;
}
requeue:
list_add_tail(&bf->list, &sc->rx.rxbuf);
if (flush)
continue;
if (edma) {
list_add_tail(&bf->list, &sc->rx.rxbuf);
ath_rx_edma_buf_link(sc, qtype);
} else {
list_move_tail(&bf->list, &sc->rx.rxbuf);
ath_rx_buf_link(sc, bf);
if (!flush)
ath9k_hw_rxena(ah);
ath9k_hw_rxena(ah);
}
} while (1);