brcm80211: smac: fix endless retry of A-MPDU transmissions

The A-MPDU code checked against a retry limit, but it was using
the wrong variable to do so. This patch fixes this to assure
proper retry mechanism.

This problem had a side-effect causing the mac80211 flush callback
to remain waiting forever as well. That side effect has been fixed
by commit by Stanislaw Gruszka:

commit f96b08a7e6f69c0f0a576554df3df5b1b519c479
Date:   Tue Jan 17 12:38:50 2012 +0100

    brcmsmac: fix tx queue flush infinite loop

    Reference:
    https://bugzilla.kernel.org/show_bug.cgi?id=42576

Cc: Stanislaw Gruszka <sgruszka@redhat.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Alwin Beukers <alwin@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c b/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c
index 90911eec0cf5..92652264f205 100644
--- a/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/ampdu.c
@@ -1051,17 +1051,13 @@ brcms_c_ampdu_dotxstatus_complete(struct ampdu_info *ampdu, struct scb *scb,
                 }
                 /* either retransmit or send bar if ack not recd */
                 if (!ack_recd) {
-                        struct ieee80211_tx_rate *txrate =
-                            tx_info->status.rates;
-                        if (retry && (txrate[0].count < (int)retry_limit)) {
+                        if (retry && (ini->txretry[index] < (int)retry_limit)) {
                                 ini->txretry[index]++;
                                 ini->tx_in_transit--;
                                 /*
                                  * Use high prededence for retransmit to
                                  * give some punch
                                  */
-                                /* brcms_c_txq_enq(wlc, scb, p,
-                                 * BRCMS_PRIO_TO_PREC(tid)); */
                                 brcms_c_txq_enq(wlc, scb, p,
                                                 BRCMS_PRIO_TO_HI_PREC(tid));
                         } else {