This is a note to let you know that I've just added the patch titled
brcmsmac: handle packet drop during transmit correctly
to the 3.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
brcmsmac-handle-packet-drop-during-transmit-correctly.patch
and it can be found in the queue-3.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From c4dea35e34f5f46e1701156153a09cce429d1ea9 Mon Sep 17 00:00:00 2001
From: Piotr Haber <pha...@broadcom.com>
Date: Wed, 28 Nov 2012 21:44:05 +0100
Subject: brcmsmac: handle packet drop during transmit correctly
From: Piotr Haber <pha...@broadcom.com>
commit c4dea35e34f5f46e1701156153a09cce429d1ea9 upstream.
The .tx() callback function can drop packets when there is no
space in the DMA fifo. Propagate that information to caller
and make sure the freed sk_buff reference is not accessed.
Reviewed-by: Arend van Spriel <ar...@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <piete...@broadcom.com>
Signed-off-by: Piotr Haber <pha...@broadcom.com>
Signed-off-by: Arend van Spriel <ar...@broadcom.com>
Signed-off-by: John W. Linville <linvi...@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c | 4 ++--
drivers/net/wireless/brcm80211/brcmsmac/main.c | 14 +++++++++-----
drivers/net/wireless/brcm80211/brcmsmac/main.h | 2 +-
drivers/net/wireless/brcm80211/brcmsmac/pub.h | 2 +-
4 files changed, 13 insertions(+), 9 deletions(-)
--- a/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/mac80211_if.c
@@ -280,8 +280,8 @@ static void brcms_ops_tx(struct ieee8021
kfree_skb(skb);
goto done;
}
- brcms_c_sendpkt_mac80211(wl->wlc, skb, hw);
- tx_info->rate_driver_data[0] = control->sta;
+ if (brcms_c_sendpkt_mac80211(wl->wlc, skb, hw))
+ tx_info->rate_driver_data[0] = control->sta;
done:
spin_unlock_bh(&wl->lock);
}
--- a/drivers/net/wireless/brcm80211/brcmsmac/main.c
+++ b/drivers/net/wireless/brcm80211/brcmsmac/main.c
@@ -6095,7 +6095,7 @@ static bool brcms_c_prec_enq(struct brcm
return brcms_c_prec_enq_head(wlc, q, pkt, prec, false);
}
-void brcms_c_txq_enq(struct brcms_c_info *wlc, struct scb *scb,
+bool brcms_c_txq_enq(struct brcms_c_info *wlc, struct scb *scb,
struct sk_buff *sdu, uint prec)
{
struct brcms_txq_info *qi = wlc->pkt_queue; /* Check me */
@@ -6110,7 +6110,9 @@ void brcms_c_txq_enq(struct brcms_c_info
* packet flooding from mac80211 stack
*/
brcmu_pkt_buf_free_skb(sdu);
+ return false;
}
+ return true;
}
/*
@@ -7273,7 +7275,7 @@ brcms_c_d11hdrs_mac80211(struct brcms_c_
return 0;
}
-void brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc, struct sk_buff *sdu,
+bool brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc, struct sk_buff *sdu,
struct ieee80211_hw *hw)
{
u8 prio;
@@ -7288,10 +7290,12 @@ void brcms_c_sendpkt_mac80211(struct brc
prio = ieee80211_is_data(d11_header->frame_control) ? sdu->priority :
MAXPRIO;
fifo = prio2fifo[prio];
- if (brcms_c_d11hdrs_mac80211(wlc, hw, sdu, scb, 0, 1, fifo, 0))
- return;
- brcms_c_txq_enq(wlc, scb, sdu, BRCMS_PRIO_TO_PREC(prio));
+ brcms_c_d11hdrs_mac80211(wlc, hw, sdu, scb, 0, 1, fifo, 0);
+ if (!brcms_c_txq_enq(wlc, scb, sdu, BRCMS_PRIO_TO_PREC(prio)))
+ return false;
brcms_c_send_q(wlc);
+
+ return true;
}
void brcms_c_send_q(struct brcms_c_info *wlc)
--- a/drivers/net/wireless/brcm80211/brcmsmac/main.h
+++ b/drivers/net/wireless/brcm80211/brcmsmac/main.h
@@ -642,7 +642,7 @@ extern void brcms_c_txfifo(struct brcms_
bool commit, s8 txpktpend);
extern void brcms_c_txfifo_complete(struct brcms_c_info *wlc, uint fifo,
s8 txpktpend);
-extern void brcms_c_txq_enq(struct brcms_c_info *wlc, struct scb *scb,
+extern bool brcms_c_txq_enq(struct brcms_c_info *wlc, struct scb *scb,
struct sk_buff *sdu, uint prec);
extern void brcms_c_print_txstatus(struct tx_status *txs);
extern int brcms_b_xmtfifo_sz_get(struct brcms_hardware *wlc_hw, uint fifo,
--- a/drivers/net/wireless/brcm80211/brcmsmac/pub.h
+++ b/drivers/net/wireless/brcm80211/brcmsmac/pub.h
@@ -321,7 +321,7 @@ extern void brcms_c_intrsrestore(struct
extern bool brcms_c_intrsupd(struct brcms_c_info *wlc);
extern bool brcms_c_isr(struct brcms_c_info *wlc, bool *wantdpc);
extern bool brcms_c_dpc(struct brcms_c_info *wlc, bool bounded);
-extern void brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc,
+extern bool brcms_c_sendpkt_mac80211(struct brcms_c_info *wlc,
struct sk_buff *sdu,
struct ieee80211_hw *hw);
extern bool brcms_c_aggregatable(struct brcms_c_info *wlc, u8 tid);
Patches currently in stable-queue which might be from pha...@broadcom.com are
queue-3.7/brcmsmac-handle-packet-drop-during-transmit-correctly.patch
queue-3.7/brcmsmac-increase-timer-reference-count-for-new-timers-only.patch
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