Merge tag 'irq_urgent_for_v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull more irqchip fixes from Borislav Petkov:
 "More irqchip fixes for 6.0 from Marc Zyngier. Stuff got left hanging
  due to the whole Plumbers and vacations commotion.

   - A couple of configuration fixes for the recently merged Loongarch
     drivers

   - A fix to avoid dynamic allocation of a cpumask which was causing
     issues with PREEMPT_RT and the GICv3 ITS

   - A tightening of an error check in the stm32 exti driver"

* tag 'irq_urgent_for_v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/loongson-pch-lpc: Add dependence on LoongArch
  irqchip: Select downstream irqchip drivers for LoongArch CPU
  irqchip/gic-v3-its: Remove cpumask_var_t allocation
  irqchip/stm32-exti: Remove check on always false condition

3 files changed, 16 insertions, 8 deletions

diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig
index 66b9fa408bf2..eb5ea5b69cfa 100644
--- a/drivers/irqchip/Kconfig
+++ b/drivers/irqchip/Kconfig
@@ -561,6 +561,11 @@ config IRQ_LOONGARCH_CPU
 	select GENERIC_IRQ_CHIP
 	select IRQ_DOMAIN
 	select GENERIC_IRQ_EFFECTIVE_AFF_MASK
+	select LOONGSON_LIOINTC
+	select LOONGSON_EIOINTC
+	select LOONGSON_PCH_PIC
+	select LOONGSON_PCH_MSI
+	select LOONGSON_PCH_LPC
 	help
 	  Support for the LoongArch CPU Interrupt Controller. For details of
 	  irq chip hierarchy on LoongArch platforms please read the document
@@ -623,8 +628,9 @@ config LOONGSON_PCH_MSI
 
 config LOONGSON_PCH_LPC
 	bool "Loongson PCH LPC Controller"
+	depends on LOONGARCH
 	depends on MACH_LOONGSON64
-	default (MACH_LOONGSON64 && LOONGARCH)
+	default MACH_LOONGSON64
 	select IRQ_DOMAIN_HIERARCHY
 	help
 	  Support for the Loongson PCH LPC Controller.
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 5ff09de6c48f..beead1a0191c 100644
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -1574,13 +1574,15 @@ static int its_select_cpu(struct irq_data *d,
 			  const struct cpumask *aff_mask)
 {
 	struct its_device *its_dev = irq_data_get_irq_chip_data(d);
-	cpumask_var_t tmpmask;
+	static DEFINE_RAW_SPINLOCK(tmpmask_lock);
+	static struct cpumask __tmpmask;
+	struct cpumask *tmpmask;
+	unsigned long flags;
 	int cpu, node;
-
-	if (!alloc_cpumask_var(&tmpmask, GFP_ATOMIC))
-		return -ENOMEM;
-
 	node = its_dev->its->numa_node;
+	tmpmask = &__tmpmask;
+
+	raw_spin_lock_irqsave(&tmpmask_lock, flags);
 
 	if (!irqd_affinity_is_managed(d)) {
 		/* First try the NUMA node */
@@ -1634,7 +1636,7 @@ static int its_select_cpu(struct irq_data *d,
 		cpu = cpumask_pick_least_loaded(d, tmpmask);
 	}
 out:
-	free_cpumask_var(tmpmask);
+	raw_spin_unlock_irqrestore(&tmpmask_lock, flags);
 
 	pr_debug("IRQ%d -> %*pbl CPU%d\n", d->irq, cpumask_pr_args(aff_mask), cpu);
 	return cpu;
diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index a73763d475f0..6a3f7498ea8e 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -716,7 +716,7 @@ static int stm32_exti_h_domain_alloc(struct irq_domain *dm,
 
 	irq_domain_set_hwirq_and_chip(dm, virq, hwirq, chip, chip_data);
 
-	if (!host_data->drv_data || !host_data->drv_data->desc_irqs)
+	if (!host_data->drv_data->desc_irqs)
 		return -EINVAL;
 
 	desc_irq = host_data->drv_data->desc_irqs[hwirq];