Merge tag 'irq-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq updates from Thomas Gleixner:
 "Updates to the interrupt core and driver subsystems:

  Core changes:

   - The usual set of small fixes and improvements all over the place,
     but nothing stands out

  MSI changes:

   - Further consolidation of the PCI/MSI interrupt chip code

   - Make MSI sysfs code independent of PCI/MSI and expose the MSI
     interrupts of platform devices in the same way as PCI exposes them.

  Driver changes:

   - Support for ARM GICv3 EPPI partitions

   - Treewide conversion to generic_handle_domain_irq() for all chained
     interrupt controllers

   - Conversion to bitmap_zalloc() throughout the irq chip drivers

   - The usual set of small fixes and improvements"

* tag 'irq-core-2021-08-30' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (57 commits)
  platform-msi: Add ABI to show msi_irqs of platform devices
  genirq/msi: Move MSI sysfs handling from PCI to MSI core
  genirq/cpuhotplug: Demote debug printk to KERN_DEBUG
  irqchip/qcom-pdc: Trim unused levels of the interrupt hierarchy
  irqdomain: Export irq_domain_disconnect_hierarchy()
  irqchip/gic-v3: Fix priority comparison when non-secure priorities are used
  irqchip/apple-aic: Fix irq_disable from within irq handlers
  pinctrl/rockchip: drop the gpio related codes
  gpio/rockchip: drop irq_gc_lock/irq_gc_unlock for irq set type
  gpio/rockchip: support next version gpio controller
  gpio/rockchip: use struct rockchip_gpio_regs for gpio controller
  gpio/rockchip: add driver for rockchip gpio
  dt-bindings: gpio: change items restriction of clock for rockchip,gpio-bank
  pinctrl/rockchip: add pinctrl device to gpio bank struct
  pinctrl/rockchip: separate struct rockchip_pin_bank to a head file
  pinctrl/rockchip: always enable clock for gpio controller
  genirq: Fix kernel doc indentation
  EDAC/altera: Convert to generic_handle_domain_irq()
  powerpc: Bulk conversion to generic_handle_domain_irq()
  nios2: Bulk conversion to generic_handle_domain_irq()
  ...

1 files changed, 10 insertions, 7 deletions

diff --git a/kernel/irq/generic-chip.c b/kernel/irq/generic-chip.c
index f8f23af6ab0d..cc7cdd26e23e 100644
--- a/kernel/irq/generic-chip.c
+++ b/kernel/irq/generic-chip.c
@@ -240,9 +240,8 @@ irq_alloc_generic_chip(const char *name, int num_ct, unsigned int irq_base,
 		       void __iomem *reg_base, irq_flow_handler_t handler)
 {
 	struct irq_chip_generic *gc;
-	unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
 
-	gc = kzalloc(sz, GFP_KERNEL);
+	gc = kzalloc(struct_size(gc, chip_types, num_ct), GFP_KERNEL);
 	if (gc) {
 		irq_init_generic_chip(gc, name, num_ct, irq_base, reg_base,
 				      handler);
@@ -288,8 +287,11 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
 {
 	struct irq_domain_chip_generic *dgc;
 	struct irq_chip_generic *gc;
-	int numchips, sz, i;
 	unsigned long flags;
+	int numchips, i;
+	size_t dgc_sz;
+	size_t gc_sz;
+	size_t sz;
 	void *tmp;
 
 	if (d->gc)
@@ -300,8 +302,9 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
 		return -EINVAL;
 
 	/* Allocate a pointer, generic chip and chiptypes for each chip */
-	sz = sizeof(*dgc) + numchips * sizeof(gc);
-	sz += numchips * (sizeof(*gc) + num_ct * sizeof(struct irq_chip_type));
+	gc_sz = struct_size(gc, chip_types, num_ct);
+	dgc_sz = struct_size(dgc, gc, numchips);
+	sz = dgc_sz + numchips * gc_sz;
 
 	tmp = dgc = kzalloc(sz, GFP_KERNEL);
 	if (!dgc)
@@ -314,7 +317,7 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
 	d->gc = dgc;
 
 	/* Calc pointer to the first generic chip */
-	tmp += sizeof(*dgc) + numchips * sizeof(gc);
+	tmp += dgc_sz;
 	for (i = 0; i < numchips; i++) {
 		/* Store the pointer to the generic chip */
 		dgc->gc[i] = gc = tmp;
@@ -331,7 +334,7 @@ int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip,
 		list_add_tail(&gc->list, &gc_list);
 		raw_spin_unlock_irqrestore(&gc_lock, flags);
 		/* Calc pointer to the next generic chip */
-		tmp += sizeof(*gc) + num_ct * sizeof(struct irq_chip_type);
+		tmp += gc_sz;
 	}
 	return 0;
 }