[4/4] ath5k: Disable interrupts in ath5k_hw_get_tsf64

Commit Message

Bruno Randolf Sept. 27, 2010, 3:22 a.m. UTC

None

Patch

diff --git a/drivers/net/wireless/ath/ath5k/pcu.c b/drivers/net/wireless/ath/ath5k/pcu.c
index 604114f..095d30b 100644
--- a/drivers/net/wireless/ath/ath5k/pcu.c
+++ b/drivers/net/wireless/ath/ath5k/pcu.c
@@ -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);