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authorThomas Gleixner <tglx@linutronix.de>2017-11-14 11:23:05 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-11-14 11:23:05 +0100
commit41cc30412d6692c25506bf2d4e65c4364c70c10a (patch)
treed9adeb9c94a54998002d46aeebb99f86f1232016
parentb29c6ef7bb1257853c1e31616d84f55e561cf631 (diff)
parent29f411399aaa2e53882858e01d21981f3c301e2a (diff)
Merge tag 'irqchip-4.15-4' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent
Pull irqchip updates for 4.15, take #4 from Marc Zyngier - A core irq fix for legacy cases where the irq trigger is not reported by firmware - A couple of GICv3/4 fixes (Kconfig, of-node refcount, error handling) - Trivial pr_err fixes
-rw-r--r--drivers/irqchip/Kconfig7
-rw-r--r--drivers/irqchip/Makefile3
-rw-r--r--drivers/irqchip/irq-gic-v3.c11
-rw-r--r--drivers/irqchip/irq-gic-v4.c7
-rw-r--r--drivers/irqchip/irq-s3c24xx.c4
-rw-r--r--include/linux/irq.h11
-rw-r--r--include/linux/irqchip/arm-gic-v4.h1
-rw-r--r--kernel/irq/manage.c13
8 files changed, 47 insertions, 10 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 53380bd72ea4..c70476b34a53 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -41,8 +41,15 @@ config ARM_GIC_V3
config ARM_GIC_V3_ITS
bool
+ select GENERIC_MSI_IRQ_DOMAIN
+ default ARM_GIC_V3
+
+config ARM_GIC_V3_ITS_PCI
+ bool
+ depends on ARM_GIC_V3_ITS
depends on PCI
depends on PCI_MSI
+ default ARM_GIC_V3_ITS
config ARM_NVIC
bool
diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile
index dae7282bfdef..d2df34a54d38 100644
--- a/drivers/irqchip/Makefile
+++ b/drivers/irqchip/Makefile
@@ -30,7 +30,8 @@ obj-$(CONFIG_ARM_GIC_PM) += irq-gic-pm.o
obj-$(CONFIG_ARCH_REALVIEW) += irq-gic-realview.o
obj-$(CONFIG_ARM_GIC_V2M) += irq-gic-v2m.o
obj-$(CONFIG_ARM_GIC_V3) += irq-gic-v3.o irq-gic-common.o
-obj-$(CONFIG_ARM_GIC_V3_ITS) += irq-gic-v3-its.o irq-gic-v3-its-pci-msi.o irq-gic-v3-its-platform-msi.o irq-gic-v4.o
+obj-$(CONFIG_ARM_GIC_V3_ITS) += irq-gic-v3-its.o irq-gic-v3-its-platform-msi.o irq-gic-v4.o
+obj-$(CONFIG_ARM_GIC_V3_ITS_PCI) += irq-gic-v3-its-pci-msi.o
obj-$(CONFIG_PARTITION_PERCPU) += irq-partition-percpu.o
obj-$(CONFIG_HISILICON_IRQ_MBIGEN) += irq-mbigen.o
obj-$(CONFIG_ARM_NVIC) += irq-nvic.o
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index b54b55597ffb..16fddff38f22 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -1103,18 +1103,18 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
int nr_parts;
struct partition_affinity *parts;
- parts_node = of_find_node_by_name(gic_node, "ppi-partitions");
+ parts_node = of_get_child_by_name(gic_node, "ppi-partitions");
if (!parts_node)
return;
nr_parts = of_get_child_count(parts_node);
if (!nr_parts)
- return;
+ goto out_put_node;
parts = kzalloc(sizeof(*parts) * nr_parts, GFP_KERNEL);
if (WARN_ON(!parts))
- return;
+ goto out_put_node;
for_each_child_of_node(parts_node, child_part) {
struct partition_affinity *part;
@@ -1181,6 +1181,9 @@ static void __init gic_populate_ppi_partitions(struct device_node *gic_node)
gic_data.ppi_descs[i] = desc;
}
+
+out_put_node:
+ of_node_put(parts_node);
}
static void __init gic_of_setup_kvm_info(struct device_node *node)
@@ -1521,7 +1524,7 @@ gic_acpi_init(struct acpi_subtable_header *header, const unsigned long end)
err = gic_validate_dist_version(acpi_data.dist_base);
if (err) {
- pr_err("No distributor detected at @%p, giving up",
+ pr_err("No distributor detected at @%p, giving up\n",
acpi_data.dist_base);
goto out_dist_unmap;
}
diff --git a/drivers/irqchip/irq-gic-v4.c b/drivers/irqchip/irq-gic-v4.c
index cd0bcc3b7e33..dba9d67cb9c1 100644
--- a/drivers/irqchip/irq-gic-v4.c
+++ b/drivers/irqchip/irq-gic-v4.c
@@ -177,6 +177,7 @@ int its_map_vlpi(int irq, struct its_vlpi_map *map)
.map = map,
},
};
+ int ret;
/*
* The host will never see that interrupt firing again, so it
@@ -184,7 +185,11 @@ int its_map_vlpi(int irq, struct its_vlpi_map *map)
*/
irq_set_status_flags(irq, IRQ_DISABLE_UNLAZY);
- return irq_set_vcpu_affinity(irq, &info);
+ ret = irq_set_vcpu_affinity(irq, &info);
+ if (ret)
+ irq_clear_status_flags(irq, IRQ_DISABLE_UNLAZY);
+
+ return ret;
}
int its_get_vlpi(int irq, struct its_vlpi_map *map)
diff --git a/drivers/irqchip/irq-s3c24xx.c b/drivers/irqchip/irq-s3c24xx.c
index c25ce5af091a..ec0e6a8cdb75 100644
--- a/drivers/irqchip/irq-s3c24xx.c
+++ b/drivers/irqchip/irq-s3c24xx.c
@@ -156,7 +156,7 @@ static int s3c_irq_type(struct irq_data *data, unsigned int type)
irq_set_handler(data->irq, handle_level_irq);
break;
default:
- pr_err("No such irq type %d", type);
+ pr_err("No such irq type %d\n", type);
return -EINVAL;
}
@@ -204,7 +204,7 @@ static int s3c_irqext_type_set(void __iomem *gpcon_reg,
break;
default:
- pr_err("No such irq type %d", type);
+ pr_err("No such irq type %d\n", type);
return -EINVAL;
}
diff --git a/include/linux/irq.h b/include/linux/irq.h
index b01d06db9101..e140f69163b6 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -211,6 +211,7 @@ struct irq_data {
* IRQD_MANAGED_SHUTDOWN - Interrupt was shutdown due to empty affinity
* mask. Applies only to affinity managed irqs.
* IRQD_SINGLE_TARGET - IRQ allows only a single affinity target
+ * IRQD_DEFAULT_TRIGGER_SET - Expected trigger already been set
*/
enum {
IRQD_TRIGGER_MASK = 0xf,
@@ -231,6 +232,7 @@ enum {
IRQD_IRQ_STARTED = (1 << 22),
IRQD_MANAGED_SHUTDOWN = (1 << 23),
IRQD_SINGLE_TARGET = (1 << 24),
+ IRQD_DEFAULT_TRIGGER_SET = (1 << 25),
};
#define __irqd_to_state(d) ACCESS_PRIVATE((d)->common, state_use_accessors)
@@ -260,18 +262,25 @@ static inline void irqd_mark_affinity_was_set(struct irq_data *d)
__irqd_to_state(d) |= IRQD_AFFINITY_SET;
}
+static inline bool irqd_trigger_type_was_set(struct irq_data *d)
+{
+ return __irqd_to_state(d) & IRQD_DEFAULT_TRIGGER_SET;
+}
+
static inline u32 irqd_get_trigger_type(struct irq_data *d)
{
return __irqd_to_state(d) & IRQD_TRIGGER_MASK;
}
/*
- * Must only be called inside irq_chip.irq_set_type() functions.
+ * Must only be called inside irq_chip.irq_set_type() functions or
+ * from the DT/ACPI setup code.
*/
static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
{
__irqd_to_state(d) &= ~IRQD_TRIGGER_MASK;
__irqd_to_state(d) |= type & IRQD_TRIGGER_MASK;
+ __irqd_to_state(d) |= IRQD_DEFAULT_TRIGGER_SET;
}
static inline bool irqd_is_level_type(struct irq_data *d)
diff --git a/include/linux/irqchip/arm-gic-v4.h b/include/linux/irqchip/arm-gic-v4.h
index 447da8ca2156..fa683ea5c769 100644
--- a/include/linux/irqchip/arm-gic-v4.h
+++ b/include/linux/irqchip/arm-gic-v4.h
@@ -109,6 +109,7 @@ int its_get_vlpi(int irq, struct its_vlpi_map *map);
int its_unmap_vlpi(int irq);
int its_prop_update_vlpi(int irq, u8 config, bool inv);
+struct irq_domain_ops;
int its_init_v4(struct irq_domain *domain, const struct irq_domain_ops *ops);
#endif
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 2ff1c0c82fc9..0f922729bab9 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1246,7 +1246,18 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
* set the trigger type must match. Also all must
* agree on ONESHOT.
*/
- unsigned int oldtype = irqd_get_trigger_type(&desc->irq_data);
+ unsigned int oldtype;
+
+ /*
+ * If nobody did set the configuration before, inherit
+ * the one provided by the requester.
+ */
+ if (irqd_trigger_type_was_set(&desc->irq_data)) {
+ oldtype = irqd_get_trigger_type(&desc->irq_data);
+ } else {
+ oldtype = new->flags & IRQF_TRIGGER_MASK;
+ irqd_set_trigger_type(&desc->irq_data, oldtype);
+ }
if (!((old->flags & new->flags) & IRQF_SHARED) ||
(oldtype != (new->flags & IRQF_TRIGGER_MASK)) ||