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Commit 28df897a authored by Bruno Randolf's avatar Bruno Randolf Committed by John W. Linville
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ath5k: Disable interrupts in ath5k_hw_get_tsf64 



The code in ath5k_hw_get_tsf64() is time critical and will return wrong results
if we get interrupted, so disable local interrupts.

Signed-off-by: default avatarBruno Randolf <br1@einfach.org>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 11f21df3

drivers/net/wireless/ath/ath5k/pcu.c

+6 −0
Original line number Diff line number Diff line
@@ -495,6 +495,10 @@ u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah) 
{

	u32 tsf_lower, tsf_upper1, tsf_upper2;

	int i;

	unsigned long flags;



	/* This code is time critical - we don't want to be interrupted here */

	local_irq_save(flags);



	/*

	 * While reading TSF upper and then lower part, the clock is still
@@ -517,6 +521,8 @@ u64 ath5k_hw_get_tsf64(struct ath5k_hw *ah) 
		tsf_upper1 = tsf_upper2;

	}



	local_irq_restore(flags);



	WARN_ON( i == ATH5K_MAX_TSF_READ );



	return (((u64)tsf_upper1 << 32) | tsf_lower);