Vasanthakumar Thiagarajan cbfe89c67b ath9k: Fix leak in tx descriptor ... When we reclaim the tx desc, we always assume that the last desc is a holding desc, which is not true, and skip it. If the tx queue is drained during channel change, internal reset and etc, the last descriptor may not be the holding descriptor and we fail to reclaim them. This results in the following two issues. 1. Tx stuck - We drop all the frames coming from upper layer due to shortage in tx desc. 2. Crash - If we fail to reclaim a tx descriptor, we miss to update the tx BA window with the seq number of the frame associated to that desc, which, at some point, result in the following crash due to an assert failure in ath_tx_addto_baw(). This patch fixes these two issues. kernel BUG at ../drivers/net/wireless/ath/ath9k/xmit.c:180! [155064.304164] invalid opcode: 0000 [#1] SMP Call Trace: [<fbc6d83b>] ? ath9k_tx+0xeb/0x160 [ath9k] [<fbbc9591>] ipv6? __ieee80211_tx+0x41/0x120 [mac80211] [<fbbcb5ae>] ? aes_i586ieee80211_master_start_xmit+0x28e/0x560 [mac80211] [<c037e501>] aes_generic? _spin_lock_irqsave+0x31/0x40 [<c02f347b>] ? dev_hard_start_xmit+0x16b/0x1c0 [<c03058b5>] ? __qdisc_run+0x1b5/0x200 [<fbbcda5a>] ? af_packetieee80211_select_queue+0xa/0x100 [mac80211] [<c02f53b7>] ? i915dev_queue_xmit+0x2e7/0x3f0 [<fbbc9b49>] ? ieee80211_subif_start_xmit+0x369/0x7a0 [mac80211] [<c031bc35>] ? ip_output+0x55/0xb0 [<c02e0188>] ? show_memcpy_count+0x18/0x60 [<c02eb186>] ? __kfree_skb+0x36/0x90 [<c02f2202>] ? binfmt_miscdev_queue_xmit_nit+0xd2/0x110 [<c02f347b>] ? dev_hard_start_xmit+0x16b/0x1c0 [<c03058b5>] ? __qdisc_run+0x1b5/0x200 [<c033bca7>] ? scoarp_create+0x57/0x2a0 [<c02f53b7>] ? bridgedev_queue_xmit+0x2e7/0x3f0 [<c03034a0>] ? eth_header+0x0/0xc0 [<c033b95f>] stp? arp_xmit+0x5f/0x70 [<c033bf4f>] ? arp_send+0x5f/0x70 [<c033c8f5>] bnep? arp_solicit+0x105/0x210 [<c02fa5aa>] ? neigh_timer_handler+0x19a/0x390 [<c013bf88>] ? run_timer_softirq+0x138/0x210 [<c02fa410>] ? ppdevneigh_timer_handler+0x0/0x390 [<c02fa410>] ? neigh_timer_handler+0x0/0x390 Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>		2009-07-07 12:55:26 -04:00
..
ahb.c
ani.c
ani.h
ath9k.h	ath9k: prevent sleeping while we are waiting for CAB	2009-06-15 15:05:58 -04:00
beacon.c	ath9k: Add sanity check for beacon_int in adhoc/mesh case	2009-06-03 14:05:11 -04:00
calib.c
calib.h
debug.c	ath9k: Fix write callback of 'debug' which configures debug mask	2009-06-03 14:06:15 -04:00
debug.h	ath9k: Add "debug" file to debugfs	2009-06-03 14:05:11 -04:00
eeprom.c
eeprom.h
hw.c	ath9k: port to cfg80211 rfkill	2009-06-15 15:05:57 -04:00
hw.h	ath9k: port to cfg80211 rfkill	2009-06-15 15:05:57 -04:00
initvals.h
Kconfig	ath9k: port to cfg80211 rfkill	2009-06-15 15:05:57 -04:00
mac.c
mac.h
main.c	ath9k: restore PS mode, before we put the chip into FULL SLEEP state.	2009-06-19 11:50:23 -04:00
Makefile
pci.c	ath9k: Fix PCI FATAL interrupts by restoring RETRY_TIMEOUT disabling	2009-06-19 11:50:17 -04:00
phy.c
phy.h
rc.c
rc.h
recv.c	ath9k: wait for beacon frame along with CAB	2009-06-19 11:50:22 -04:00
reg.h
virtual.c
xmit.c	ath9k: Fix leak in tx descriptor	2009-07-07 12:55:26 -04:00