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path: root/target/linux/omap24xx/patches-3.1/253-cbus-tahvo-irq-reg-lock.patch
blob: c27a67c7c90c8bfd09ba853ba28ffc1fb0b15c8a (plain)
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Index: linux-3.1.1/drivers/cbus/tahvo.c
===================================================================
--- linux-3.1.1.orig/drivers/cbus/tahvo.c	2011-11-17 18:51:03.708374259 +0100
+++ linux-3.1.1/drivers/cbus/tahvo.c	2011-11-17 18:57:17.739067493 +0100
@@ -137,8 +137,10 @@ static irqreturn_t tahvo_irq_handler(int
 	u16			id;
 	u16			im;
 
+	mutex_lock(&tahvo->mutex);
 	id = __tahvo_read_reg(tahvo, TAHVO_REG_IDR);
 	im = __tahvo_read_reg(tahvo, TAHVO_REG_IMR);
+	mutex_unlock(&tahvo->mutex);
 	id &= ~im;
 
 	if (!id) {