[GIT PULL] IRQ fixes

[Ingo Molnar <mingo@kernel.org>]

Linus,

Please pull the latest irq-urgent-for-linus git tree from:

   git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git irq-urgent-for-linus

   # HEAD: c5b635203032462603c503ecce91a7021c1ad44a irqchip/mxs: Add missing set_handle_irq()

Mostly driver fixes, but also an irq core crash fix and a build fix.

 Thanks,

	Ingo

------------------>
Arnd Bergmann (1):
      irqchip/s3c24xx: Mark init_eint as __maybe_unused

Marc Zyngier (3):
      irqdomain: Allow domain lookup with DOMAIN_BUS_WIRED token
      of: MSI: Simplify irqdomain lookup
      irqchip/gic-v3-its: Recompute the number of pages on page size change

Milo Kim (1):
      irqchip/atmel-aic: Fix wrong bit operation for IRQ priority

Oleksij Rempel (1):
      irqchip/mxs: Add missing set_handle_irq()

Richard Weinberger (1):
      irqchip: Fix dependencies for archs w/o HAS_IOMEM

Thomas Gleixner (1):
      genirq: Validate action before dereferencing it in handle_irq_event_percpu()

Thomas Petazzoni (1):
      base: Export platform_msi_domain_[alloc,free]_irqs


 drivers/base/platform-msi.c            |  2 ++
 drivers/irqchip/Kconfig                |  1 +
 drivers/irqchip/irq-atmel-aic-common.c |  2 +-
 drivers/irqchip/irq-gic-v3-its.c       |  8 ++++++--
 drivers/irqchip/irq-mxs.c              |  1 +
 drivers/irqchip/irq-s3c24xx.c          |  2 +-
 drivers/of/irq.c                       | 18 +++---------------
 include/linux/irqdomain.h              |  1 +
 kernel/irq/handle.c                    |  5 +++--
 kernel/irq/irqdomain.c                 | 11 ++++++++---
 10 files changed, 27 insertions(+), 24 deletions(-)

diff --git a/drivers/base/platform-msi.c b/drivers/base/platform-msi.c
index 47c43386786b..279e53989374 100644
--- a/drivers/base/platform-msi.c
+++ b/drivers/base/platform-msi.c
@@ -284,6 +284,7 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
 
 	return err;
 }
+EXPORT_SYMBOL_GPL(platform_msi_domain_alloc_irqs);
 
 /**
  * platform_msi_domain_free_irqs - Free MSI interrupts for @dev
@@ -301,6 +302,7 @@ void platform_msi_domain_free_irqs(struct device *dev)
 	msi_domain_free_irqs(dev->msi_domain, dev);
 	platform_msi_free_descs(dev, 0, MAX_DEV_MSIS);
 }
+EXPORT_SYMBOL_GPL(platform_msi_domain_free_irqs);
 
 /**
  * platform_msi_get_host_data - Query the private data associated with
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 11fc2a27fa2e..90ab59107830 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -154,6 +154,7 @@ config TB10X_IRQC
 config TS4800_IRQ
 	tristate "TS-4800 IRQ controller"
 	select IRQ_DOMAIN
+	depends on HAS_IOMEM
 	help
 	  Support for the TS-4800 FPGA IRQ controller
 
diff --git a/drivers/irqchip/irq-atmel-aic-common.c b/drivers/irqchip/irq-atmel-aic-common.c
index b12a5d58546f..37199b9b2cfa 100644
--- a/drivers/irqchip/irq-atmel-aic-common.c
+++ b/drivers/irqchip/irq-atmel-aic-common.c
@@ -86,7 +86,7 @@ int aic_common_set_priority(int priority, unsigned *val)
 	    priority > AT91_AIC_IRQ_MAX_PRIORITY)
 		return -EINVAL;
 
-	*val &= AT91_AIC_PRIOR;
+	*val &= ~AT91_AIC_PRIOR;
 	*val |= priority;
 
 	return 0;
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index e23d1d18f9d6..3447549fcc93 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -875,6 +875,7 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
 		}
 
 		alloc_size = (1 << order) * PAGE_SIZE;
+retry_alloc_baser:
 		alloc_pages = (alloc_size / psz);
 		if (alloc_pages > GITS_BASER_PAGES_MAX) {
 			alloc_pages = GITS_BASER_PAGES_MAX;
@@ -938,13 +939,16 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
 			 * size and retry. If we reach 4K, then
 			 * something is horribly wrong...
 			 */
+			free_pages((unsigned long)base, order);
+			its->tables[i] = NULL;
+
 			switch (psz) {
 			case SZ_16K:
 				psz = SZ_4K;
-				goto retry_baser;
+				goto retry_alloc_baser;
 			case SZ_64K:
 				psz = SZ_16K;
-				goto retry_baser;
+				goto retry_alloc_baser;
 			}
 		}
 
diff --git a/drivers/irqchip/irq-mxs.c b/drivers/irqchip/irq-mxs.c
index c22e2d40cb30..efe50845939d 100644
--- a/drivers/irqchip/irq-mxs.c
+++ b/drivers/irqchip/irq-mxs.c
@@ -241,6 +241,7 @@ static int __init asm9260_of_init(struct device_node *np,
 		writel(0, icoll_priv.intr + i);
 
 	icoll_add_domain(np, ASM9260_NUM_IRQS);
+	set_handle_irq(icoll_handle_irq);
 
 	return 0;
 }
diff --git a/drivers/irqchip/irq-s3c24xx.c b/drivers/irqchip/irq-s3c24xx.c
index c71914e8f596..5dc5a760c723 100644
--- a/drivers/irqchip/irq-s3c24xx.c
+++ b/drivers/irqchip/irq-s3c24xx.c
@@ -605,7 +605,7 @@ static struct s3c_irq_intc * __init s3c24xx_init_intc(struct device_node *np,
 	return ERR_PTR(ret);
 }
 
-static struct s3c_irq_data init_eint[32] = {
+static struct s3c_irq_data __maybe_unused init_eint[32] = {
 	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
 	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
 	{ .type = S3C_IRQTYPE_NONE, }, /* reserved */
diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 4fa916dffc91..a9ea5525109b 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -680,18 +680,6 @@ u32 of_msi_map_rid(struct device *dev, struct device_node *msi_np, u32 rid_in)
 	return __of_msi_map_rid(dev, &msi_np, rid_in);
 }
 
-static struct irq_domain *__of_get_msi_domain(struct device_node *np,
-					      enum irq_domain_bus_token token)
-{
-	struct irq_domain *d;
-
-	d = irq_find_matching_host(np, token);
-	if (!d)
-		d = irq_find_host(np);
-
-	return d;
-}
-
 /**
  * of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain
  * @dev: device for which the mapping is to be done.
@@ -707,7 +695,7 @@ struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 rid)
 	struct device_node *np = NULL;
 
 	__of_msi_map_rid(dev, &np, rid);
-	return __of_get_msi_domain(np, DOMAIN_BUS_PCI_MSI);
+	return irq_find_matching_host(np, DOMAIN_BUS_PCI_MSI);
 }
 
 /**
@@ -731,7 +719,7 @@ struct irq_domain *of_msi_get_domain(struct device *dev,
 	/* Check for a single msi-parent property */
 	msi_np = of_parse_phandle(np, "msi-parent", 0);
 	if (msi_np && !of_property_read_bool(msi_np, "#msi-cells")) {
-		d = __of_get_msi_domain(msi_np, token);
+		d = irq_find_matching_host(msi_np, token);
 		if (!d)
 			of_node_put(msi_np);
 		return d;
@@ -745,7 +733,7 @@ struct irq_domain *of_msi_get_domain(struct device *dev,
 		while (!of_parse_phandle_with_args(np, "msi-parent",
 						   "#msi-cells",
 						   index, &args)) {
-			d = __of_get_msi_domain(args.np, token);
+			d = irq_find_matching_host(args.np, token);
 			if (d)
 				return d;
 
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index f64622ad02c1..04579d9fbce4 100644
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -70,6 +70,7 @@ struct irq_fwspec {
  */
 enum irq_domain_bus_token {
 	DOMAIN_BUS_ANY		= 0,
+	DOMAIN_BUS_WIRED,
 	DOMAIN_BUS_PCI_MSI,
 	DOMAIN_BUS_PLATFORM_MSI,
 	DOMAIN_BUS_NEXUS,
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index a302cf9a2126..57bff7857e87 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -138,7 +138,8 @@ irqreturn_t handle_irq_event_percpu(struct irq_desc *desc)
 	unsigned int flags = 0, irq = desc->irq_data.irq;
 	struct irqaction *action = desc->action;
 
-	do {
+	/* action might have become NULL since we dropped the lock */
+	while (action) {
 		irqreturn_t res;
 
 		trace_irq_handler_entry(irq, action);
@@ -173,7 +174,7 @@ irqreturn_t handle_irq_event_percpu(struct irq_desc *desc)
 
 		retval |= res;
 		action = action->next;
-	} while (action);
+	}
 
 	add_interrupt_randomness(irq, flags);
 
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 8cf95de1ab3f..d75179735a28 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -575,10 +575,15 @@ unsigned int irq_create_fwspec_mapping(struct irq_fwspec *fwspec)
 	unsigned int type = IRQ_TYPE_NONE;
 	int virq;
 
-	if (fwspec->fwnode)
-		domain = irq_find_matching_fwnode(fwspec->fwnode, DOMAIN_BUS_ANY);
-	else
+	if (fwspec->fwnode) {
+		domain = irq_find_matching_fwnode(fwspec->fwnode,
+						  DOMAIN_BUS_WIRED);
+		if (!domain)
+			domain = irq_find_matching_fwnode(fwspec->fwnode,
+							  DOMAIN_BUS_ANY);
+	} else {
 		domain = irq_default_domain;
+	}
 
 	if (!domain) {
 		pr_warn("no irq domain found for %s !\n",