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Diffstat (limited to 'target/linux/omap24xx/patches-3.3/252-cbus-retu-tahvo-ack-fix.patch')
-rw-r--r--target/linux/omap24xx/patches-3.3/252-cbus-retu-tahvo-ack-fix.patch142
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);
+ }