1 files changed, 117 insertions, 0 deletions

diff --git a/recipes-kernel/linux/linux-ti33x-psp-3.2/3.2.9/0057-genirq-Handle-pending-irqs-in-irq_startup.patch b/recipes-kernel/linux/linux-ti33x-psp-3.2/3.2.9/0057-genirq-Handle-pending-irqs-in-irq_startup.patch
new file mode 100644
index 00000000..b52cb6a3
--- /dev/null
+++ b/recipes-kernel/linux/linux-ti33x-psp-3.2/3.2.9/0057-genirq-Handle-pending-irqs-in-irq_startup.patch
@@ -0,0 +1,117 @@
+From cde7a1b79f95c783def648bff541ee319148e611 Mon Sep 17 00:00:00 2001
+From: Thomas Gleixner <tglx@linutronix.de>
+Date: Wed, 8 Feb 2012 11:57:52 +0100
+Subject: [PATCH 57/72] genirq: Handle pending irqs in irq_startup()
+
+commit b4bc724e82e80478cba5fe9825b62e71ddf78757 upstream.
+
+An interrupt might be pending when irq_startup() is called, but the
+startup code does not invoke the resend logic. In some cases this
+prevents the device from issuing another interrupt which renders the
+device non functional.
+
+Call the resend function in irq_startup() to keep things going.
+
+Reported-and-tested-by: Russell King <rmk+kernel@arm.linux.org.uk>
+Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
+Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
+---
+ kernel/irq/autoprobe.c |    4 ++--
+ kernel/irq/chip.c      |   17 ++++++++++-------
+ kernel/irq/internals.h |    2 +-
+ kernel/irq/manage.c    |    2 +-
+ 4 files changed, 14 insertions(+), 11 deletions(-)
+
+diff --git a/kernel/irq/autoprobe.c b/kernel/irq/autoprobe.c
+index 342d8f4..0119b9d 100644
+--- a/kernel/irq/autoprobe.c
++++ b/kernel/irq/autoprobe.c
+@@ -53,7 +53,7 @@ unsigned long probe_irq_on(void)
+                        if (desc->irq_data.chip->irq_set_type)
+                                desc->irq_data.chip->irq_set_type(&desc->irq_data,
+                                                         IRQ_TYPE_PROBE);
+-                       irq_startup(desc);
++                       irq_startup(desc, false);
+                }
+                raw_spin_unlock_irq(&desc->lock);
+        }
+@@ -70,7 +70,7 @@ unsigned long probe_irq_on(void)
+                raw_spin_lock_irq(&desc->lock);
+                if (!desc->action && irq_settings_can_probe(desc)) {
+                        desc->istate |= IRQS_AUTODETECT | IRQS_WAITING;
+-                       if (irq_startup(desc))
++                       if (irq_startup(desc, false))
+                                desc->istate |= IRQS_PENDING;
+                }
+                raw_spin_unlock_irq(&desc->lock);
+diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
+index b742edc..fb7db75 100644
+--- a/kernel/irq/chip.c
++++ b/kernel/irq/chip.c
+@@ -157,19 +157,22 @@ static void irq_state_set_masked(struct irq_desc *desc)
+        irqd_set(&desc->irq_data, IRQD_IRQ_MASKED);
+ }
+ 
+-int irq_startup(struct irq_desc *desc)
++int irq_startup(struct irq_desc *desc, bool resend)
+ {
++       int ret = 0;
++
+        irq_state_clr_disabled(desc);
+        desc->depth = 0;
+ 
+        if (desc->irq_data.chip->irq_startup) {
+-               int ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
++               ret = desc->irq_data.chip->irq_startup(&desc->irq_data);
+                irq_state_clr_masked(desc);
+-               return ret;
++       } else {
++               irq_enable(desc);
+        }
+-
+-       irq_enable(desc);
+-       return 0;
++       if (resend)
++               check_irq_resend(desc, desc->irq_data.irq);
++       return ret;
+ }
+ 
+ void irq_shutdown(struct irq_desc *desc)
+@@ -646,7 +649,7 @@ __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
+                irq_settings_set_noprobe(desc);
+                irq_settings_set_norequest(desc);
+                irq_settings_set_nothread(desc);
+-               irq_startup(desc);
++               irq_startup(desc, true);
+        }
+ out:
+        irq_put_desc_busunlock(desc, flags);
+diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
+index a73dd6c..e1a8b64 100644
+--- a/kernel/irq/internals.h
++++ b/kernel/irq/internals.h
+@@ -67,7 +67,7 @@ extern int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
+ extern void __disable_irq(struct irq_desc *desc, unsigned int irq, bool susp);
+ extern void __enable_irq(struct irq_desc *desc, unsigned int irq, bool resume);
+ 
+-extern int irq_startup(struct irq_desc *desc);
++extern int irq_startup(struct irq_desc *desc, bool resend);
+ extern void irq_shutdown(struct irq_desc *desc);
+ extern void irq_enable(struct irq_desc *desc);
+ extern void irq_disable(struct irq_desc *desc);
+diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
+index 1da999f..cf2d7ae 100644
+--- a/kernel/irq/manage.c
++++ b/kernel/irq/manage.c
+@@ -1027,7 +1027,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
+                        desc->istate |= IRQS_ONESHOT;
+ 
+                if (irq_settings_can_autoenable(desc))
+-                       irq_startup(desc);
++                       irq_startup(desc, true);
+                else
+                        /* Undo nested disables: */
+                        desc->depth = 1;
+-- 
+1.7.9.4
+