cbus-retu: Add IRQ handler locking

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@25796 3c298f89-4303-0410-b956-a3cf2f4a3e73
2011-02-28 20:24:56 +00:00 · 2011-02-28 20:24:56 +00:00 · c7579594f1
parent 84b78edf81
commit c7579594f1
1 changed files with 18 additions and 0 deletions
--- a/target/linux/omap24xx/patches-2.6.38/506-cbus-retu-irq-handler-locking.patch
+++ b/target/linux/omap24xx/patches-2.6.38/506-cbus-retu-irq-handler-locking.patch
@ -0,0 +1,18 @@
+Index: linux-2.6.38-rc6/drivers/cbus/retu.c
+===================================================================
+--- linux-2.6.38-rc6.orig/drivers/cbus/retu.c	2011-02-28 15:21:10.645505891 +0100
+++ linux-2.6.38-rc6/drivers/cbus/retu.c	2011-02-28 15:22:24.030477769 +0100
+@@ -198,10 +198,12 @@ static irqreturn_t retu_irq_handler(int
+ 	u16			idr;
+ 	u16			imr;
+ 
+	mutex_lock(&retu->mutex);
+ 	idr = __retu_read_reg(retu, RETU_REG_IDR);
+ 	imr = __retu_read_reg(retu, RETU_REG_IMR);
+-	idr &= ~imr;
+	mutex_unlock(&retu->mutex);
+ 
+	idr &= ~imr;
+ 	if (!idr) {
+ 		dev_vdbg(retu->dev, "No IRQ, spurious?\n");
+ 		return IRQ_NONE;