From b9da4d223bdade1f6f3401387761f61b0da1224e Mon Sep 17 00:00:00 2001 From: Brian Norris Date: Fri, 18 Nov 2016 22:43:25 +0530 Subject: [PATCH] mwifiex: avoid double-disable_irq() race We have a race where the wakeup IRQ might be in flight while we're calling mwifiex_disable_wake() from resume(). This can leave us disabling the IRQ twice. Let's disable the IRQ and enable it in case if we have double-disabled it. Signed-off-by: Brian Norris Signed-off-by: Amitkumar Karwar Signed-off-by: Kalle Valo --- drivers/net/wireless/marvell/mwifiex/main.h | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/marvell/mwifiex/main.h b/drivers/net/wireless/marvell/mwifiex/main.h index cf4c78080d94..5c9bd944b6ea 100644 --- a/drivers/net/wireless/marvell/mwifiex/main.h +++ b/drivers/net/wireless/marvell/mwifiex/main.h @@ -1424,8 +1424,13 @@ static inline void mwifiex_disable_wake(struct mwifiex_adapter *adapter) { if (adapter->irq_wakeup >= 0) { disable_irq_wake(adapter->irq_wakeup); - if (!adapter->wake_by_wifi) - disable_irq(adapter->irq_wakeup); + disable_irq(adapter->irq_wakeup); + if (adapter->wake_by_wifi) + /* Undo our disable, since interrupt handler already + * did this. + */ + enable_irq(adapter->irq_wakeup); + } } -- 2.20.1