From 8e75bb199071d3c86cd04ecb98b35e5b65d39594 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 9 Jan 2013 16:16:52 +0100 Subject: [PATCH] ath9k: do not link receive buffers during flush commit a3dc48e82bb146ef11cf75676c8410c1df29b0c4 upstream. 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. Signed-off-by: Felix Fietkau Signed-off-by: John W. Linville Signed-off-by: Ben Hutchings --- drivers/net/wireless/ath/ath9k/recv.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c index b4cbc82c2c77..d171a7242e4a 100644 --- a/drivers/net/wireless/ath/ath9k/recv.c +++ b/drivers/net/wireless/ath/ath9k/recv.c @@ -786,6 +786,7 @@ 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; @@ -1966,14 +1967,15 @@ requeue_drop_frag: 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); -- 2.39.5