diff options
Diffstat (limited to 'package/kernel/mac80211/patches/329-ath9k-unlock-rcu-read-when-returning-early.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/329-ath9k-unlock-rcu-read-when-returning-early.patch | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/package/kernel/mac80211/patches/329-ath9k-unlock-rcu-read-when-returning-early.patch b/package/kernel/mac80211/patches/329-ath9k-unlock-rcu-read-when-returning-early.patch deleted file mode 100644 index b8ba355899..0000000000 --- a/package/kernel/mac80211/patches/329-ath9k-unlock-rcu-read-when-returning-early.patch +++ /dev/null @@ -1,65 +0,0 @@ -From: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de> -Date: Mon, 12 Dec 2016 19:50:01 +0100 -Subject: [PATCH] ath9k: unlock rcu read when returning early - -Starting with ath9k: use ieee80211_tx_status_noskb where possible -[d94a461d7a7df68991fb9663531173f60ef89c68] the driver uses rcu_read_lock() && -rcu_read_unlock() yet on returning early in ath_tx_edma_tasklet() the unlock is -missing leading to stalls and suspicious RCU usage: - - =============================== - [ INFO: suspicious RCU usage. ] - 4.9.0-rc8 #11 Not tainted - ------------------------------- - kernel/rcu/tree.c:705 Illegal idle entry in RCU read-side critical section.! - - other info that might help us debug this: - - RCU used illegally from idle CPU! - rcu_scheduler_active = 1, debug_locks = 0 - RCU used illegally from extended quiescent state! - 1 lock held by swapper/7/0: - #0: - ( - rcu_read_lock - ){......} - , at: - [<ffffffffa06ed110>] ath_tx_edma_tasklet+0x0/0x450 [ath9k] - - stack backtrace: - CPU: 7 PID: 0 Comm: swapper/7 Not tainted 4.9.0-rc8 #11 - Hardware name: Acer Aspire V3-571G/VA50_HC_CR, BIOS V2.21 12/16/2013 - ffff88025efc3f38 ffffffff8132b1e5 ffff88017ede4540 0000000000000001 - ffff88025efc3f68 ffffffff810a25f7 ffff88025efcee60 ffff88017edebdd8 - ffff88025eeb5400 0000000000000091 ffff88025efc3f88 ffffffff810c3cd4 - Call Trace: - <IRQ> - [<ffffffff8132b1e5>] dump_stack+0x68/0x93 - [<ffffffff810a25f7>] lockdep_rcu_suspicious+0xd7/0x110 - [<ffffffff810c3cd4>] rcu_eqs_enter_common.constprop.85+0x154/0x200 - [<ffffffff810c5a54>] rcu_irq_exit+0x44/0xa0 - [<ffffffff81058631>] irq_exit+0x61/0xd0 - [<ffffffff81018d25>] do_IRQ+0x65/0x110 - [<ffffffff81672189>] common_interrupt+0x89/0x89 - <EOI> - [<ffffffff814ffe11>] ? cpuidle_enter_state+0x151/0x200 - [<ffffffff814ffee2>] cpuidle_enter+0x12/0x20 - [<ffffffff8109a6ae>] call_cpuidle+0x1e/0x40 - [<ffffffff8109a8f6>] cpu_startup_entry+0x146/0x220 - [<ffffffff810336f8>] start_secondary+0x148/0x170 - -Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de> -Signed-off-by: Felix Fietkau <nbd@nbd.name> ---- - ---- a/drivers/net/wireless/ath/ath9k/xmit.c -+++ b/drivers/net/wireless/ath/ath9k/xmit.c -@@ -2757,7 +2757,7 @@ void ath_tx_edma_tasklet(struct ath_soft - fifo_list = &txq->txq_fifo[txq->txq_tailidx]; - if (list_empty(fifo_list)) { - ath_txq_unlock(sc, txq); -- return; -+ break; - } - - bf = list_first_entry(fifo_list, struct ath_buf, list); |