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-rw-r--r--target/linux/omap24xx/patches-2.6.38/506-cbus-retu-irq-handler-locking.patch18
1 files changed, 18 insertions, 0 deletions
diff --git 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
new file mode 100644
index 0000000000..364ffa386e
--- /dev/null
+++ 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;