1 files changed, 142 insertions, 0 deletions
diff --git a/target/linux/omap24xx/patches-3.3/252-cbus-retu-tahvo-ack-fix.patch b/target/linux/omap24xx/patches-3.3/252-cbus-retu-tahvo-ack-fix.patch
new file mode 100644
index 0000000000..86f2f770e9
--- /dev/null
+++ b/target/linux/omap24xx/patches-3.3/252-cbus-retu-tahvo-ack-fix.patch
@@ -0,0 +1,142 @@
+--- a/drivers/cbus/retu.c
++++ b/drivers/cbus/retu.c
+@@ -53,9 +53,6 @@ struct retu {
+ 
+ 	int			irq;
+ 
+-	int			ack;
+-	bool			ack_pending;
+-
+ 	int			mask;
+ 	bool			mask_pending;
+ 
+@@ -191,9 +188,10 @@ static irqreturn_t retu_irq_handler(int
+ 	mutex_lock(&retu->mutex);
+ 	idr = __retu_read_reg(retu, RETU_REG_IDR);
+ 	imr = __retu_read_reg(retu, RETU_REG_IMR);
++	idr &= ~imr;
++	__retu_write_reg(retu, RETU_REG_IDR, idr);
+ 	mutex_unlock(&retu->mutex);
+ 
+-	idr &= ~imr;
+ 	if (!idr) {
+ 		dev_vdbg(retu->dev, "No IRQ, spurious?\n");
+ 		return IRQ_NONE;
+@@ -232,15 +230,6 @@ static void retu_irq_unmask(struct irq_d
+ 
+ }
+ 
+-static void retu_irq_ack(struct irq_data *data)
+-{
+-	struct retu		*retu = irq_data_get_irq_chip_data(data);
+-	int			irq = data->irq;
+-
+-	retu->ack |= (1 << (irq - retu->irq_base));
+-	retu->ack_pending = true;
+-}
+-
+ static void retu_bus_lock(struct irq_data *data)
+ {
+ 	struct retu		*retu = irq_data_get_irq_chip_data(data);
+@@ -257,11 +246,6 @@ static void retu_bus_sync_unlock(struct
+ 		retu->mask_pending = false;
+ 	}
+ 
+-	if (retu->ack_pending) {
+-		__retu_write_reg(retu, RETU_REG_IDR, retu->ack);
+-		retu->ack_pending = false;
+-	}
+-
+ 	mutex_unlock(&retu->mutex);
+ }
+ 
+@@ -271,7 +255,6 @@ static struct irq_chip retu_irq_chip = {
+ 	.irq_bus_sync_unlock	= retu_bus_sync_unlock,
+ 	.irq_mask		= retu_irq_mask,
+ 	.irq_unmask		= retu_irq_unmask,
+-	.irq_ack		= retu_irq_ack,
+ };
+ 
+ static inline void retu_irq_setup(int irq)
+@@ -291,8 +274,7 @@ static void retu_irq_init(struct retu *r
+ 
+ 	for (irq = base; irq < end; irq++) {
+ 		irq_set_chip_data(irq, retu);
+-		irq_set_chip_and_handler(irq, &retu_irq_chip,
+-				handle_simple_irq);
++		irq_set_chip(irq, &retu_irq_chip);
+ 		irq_set_nested_thread(irq, 1);
+ 		retu_irq_setup(irq);
+ 	}
+--- a/drivers/cbus/tahvo.c
++++ b/drivers/cbus/tahvo.c
+@@ -48,11 +48,9 @@ struct tahvo {
+ 	int		irq_end;
+ 	int		irq;
+ 
+-	int		ack;
+ 	int		mask;
+ 
+ 	unsigned int	mask_pending:1;
+-	unsigned int	ack_pending:1;
+ 	unsigned int	is_betty:1;
+ };
+ 
+@@ -138,9 +136,12 @@ 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);
+ 	id &= ~im;
++	__tahvo_write_reg(tahvo, TAHVO_REG_IDR, id);
++	mutex_unlock(&tahvo->mutex);
+ 
+ 	if (!id) {
+ 		dev_vdbg(tahvo->dev, "No IRQ, spurious ?\n");
+@@ -177,11 +178,6 @@ static void tahvo_irq_bus_sync_unlock(st
+ 		tahvo->mask_pending = false;
+ 	}
+ 
+-	if (tahvo->ack_pending) {
+-		__tahvo_write_reg(tahvo, TAHVO_REG_IDR, tahvo->ack);
+-		tahvo->ack_pending = false;
+-	}
+-
+ 	mutex_unlock(&tahvo->mutex);
+ }
+ 
+@@ -203,22 +199,12 @@ static void tahvo_irq_unmask(struct irq_
+ 	tahvo->mask_pending = true;
+ }
+ 
+-static void tahvo_irq_ack(struct irq_data *data)
+-{
+-	struct tahvo		*tahvo = irq_data_get_irq_chip_data(data);
+-	int			irq = data->irq;
+-
+-	tahvo->ack |= (1 << (irq - tahvo->irq_base));
+-	tahvo->ack_pending = true;
+-}
+-
+ static struct irq_chip tahvo_irq_chip = {
+ 	.name			= "tahvo",
+ 	.irq_bus_lock		= tahvo_irq_bus_lock,
+ 	.irq_bus_sync_unlock	= tahvo_irq_bus_sync_unlock,
+ 	.irq_mask		= tahvo_irq_mask,
+ 	.irq_unmask		= tahvo_irq_unmask,
+-	.irq_ack		= tahvo_irq_ack,
+ };
+ 
+ static inline void tahvo_irq_setup(int irq)
+@@ -238,8 +224,7 @@ static void tahvo_irq_init(struct tahvo
+ 
+ 	for (irq = base; irq < end; irq++) {
+ 		irq_set_chip_data(irq, tahvo);
+-		irq_set_chip_and_handler(irq, &tahvo_irq_chip,
+-				handle_simple_irq);
++		irq_set_chip(irq, &tahvo_irq_chip);
+ 		irq_set_nested_thread(irq, 1);
+ 		tahvo_irq_setup(irq);
+ 	}