From 4d6d90e15db30991bf81060a0876ae8adb843c75 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Tue, 16 Oct 2012 21:08:58 -0700
Subject: [PATCH] altos/avr: Use ISR_BLOCK to disable interrupts during slave
 ISR

This avoids enabling and then immediatly disabling them

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/avr/ao_spi_slave.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/src/avr/ao_spi_slave.c b/src/avr/ao_spi_slave.c
index b742d29a..a400b8a0 100644
--- a/src/avr/ao_spi_slave.c
+++ b/src/avr/ao_spi_slave.c
@@ -44,9 +44,8 @@ ao_spi_slave_send(uint8_t *buf, uint8_t len)
 
 static uint8_t ao_spi_slave_running;
 
-ISR(PCINT0_vect)
+ISR(PCINT0_vect, ISR_BLOCK)
 {
-	cli();
 #if SPI_SLAVE_PIN_0_3
 	if ((PINB & (1 << PORTB0)) == 0)
 #endif
@@ -61,7 +60,6 @@ ISR(PCINT0_vect)
 	} else {
 		ao_spi_slave_running = 0;
 	}
-	sei();
 }
 
 void
-- 
2.30.2