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iwlwifi: stop interrupts before stopping device

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If an RX interrupt is signalled after or during apm_stop
we may try to access the peripherals which are already
down. Prevent this by disabling interrupts first.

Signed-off-by: David Spinadel <david.spinadel@intel.com>
Reviewed-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
David Spinadel 2012-08-12 08:14:04 +03:00 committed by Johannes Berg
parent 8b61fa242c
commit ee7d737c45
1 changed files with 4 additions and 0 deletions
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4
drivers/net/wireless/iwlwifi/pcie/trans.c
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@ -1453,6 +1453,10 @@ static void iwl_trans_pcie_stop_hw(struct iwl_trans *trans,
bool hw_rfkill;
unsigned long flags;
spin_lock_irqsave(&trans_pcie->irq_lock, flags);
iwl_disable_interrupts(trans);
spin_unlock_irqrestore(&trans_pcie->irq_lock, flags);
iwl_apm_stop(trans);
spin_lock_irqsave(&trans_pcie->irq_lock, flags);