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Correctly remove entries from the relevant receive ath_buf list before 

freeing them.

The current code would walk the list and call the buffer free, which
didn't remove it from any lists before pushing it back on the free list.

Tested:		AR9485, STA mode

Noticed by:	dillon@apollo.dragonflybsd.org
This commit is contained in:
Adrian Chadd 2014-01-06 03:48:32 +00:00
parent 02f1bd6b8d
commit 2aeb1b35eb
1 changed files with 14 additions and 6 deletions
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20
sys/dev/ath/if_ath_rx_edma.c
View File

@ -450,18 +450,20 @@ ath_edma_recv_proc_queue(struct ath_softc *sc, HAL_RX_QUEUE qtype,
static void
ath_edma_flush_deferred_queue(struct ath_softc *sc)
{
struct ath_buf *bf, *next;
struct ath_buf *bf;
ATH_RX_LOCK_ASSERT(sc);
/* Free in one set, inside the lock */
TAILQ_FOREACH_SAFE(bf,
&sc->sc_rx_rxlist[HAL_RX_QUEUE_LP], bf_list, next) {
while (! TAILQ_EMPTY(&sc->sc_rx_rxlist[HAL_RX_QUEUE_LP])) {
bf = TAILQ_FIRST(&sc->sc_rx_rxlist[HAL_RX_QUEUE_LP]);
TAILQ_REMOVE(&sc->sc_rx_rxlist[HAL_RX_QUEUE_LP], bf, bf_list);
/* Free the buffer/mbuf */
ath_edma_rxbuf_free(sc, bf);
}
TAILQ_FOREACH_SAFE(bf,
&sc->sc_rx_rxlist[HAL_RX_QUEUE_HP], bf_list, next) {
while (! TAILQ_EMPTY(&sc->sc_rx_rxlist[HAL_RX_QUEUE_HP])) {
bf = TAILQ_FIRST(&sc->sc_rx_rxlist[HAL_RX_QUEUE_HP]);
TAILQ_REMOVE(&sc->sc_rx_rxlist[HAL_RX_QUEUE_HP], bf, bf_list);
/* Free the buffer/mbuf */
ath_edma_rxbuf_free(sc, bf);
}
@ -495,6 +497,10 @@ ath_edma_recv_proc_deferred_queue(struct ath_softc *sc, HAL_RX_QUEUE qtype,
ATH_RX_UNLOCK(sc);
/* Handle the completed descriptors */
/*
* XXX is this SAFE call needed? The ath_buf entries
* aren't modified by ath_rx_pkt, right?
*/
TAILQ_FOREACH_SAFE(bf, &rxlist, bf_list, next) {
/*
* Skip the RX descriptor status - start at the data offset
@ -520,7 +526,9 @@ ath_edma_recv_proc_deferred_queue(struct ath_softc *sc, HAL_RX_QUEUE qtype,
/* Free in one set, inside the lock */
ATH_RX_LOCK(sc);
TAILQ_FOREACH_SAFE(bf, &rxlist, bf_list, next) {
while (! TAILQ_EMPTY(&rxlist)) {
bf = TAILQ_FIRST(&rxlist);
TAILQ_REMOVE(&rxlist, bf, bf_list);
/* Free the buffer/mbuf */
ath_edma_rxbuf_free(sc, bf);
}