Merge tag 'irqchip-5.16' into irq/core

Merge irqchip updates for Linux 5.16 from Marc Zyngier:

- A large cross-arch rework to move irq_enter()/irq_exit() into
  the arch code, and removing it from the generic irq code.
  Thanks to Mark Rutland for the huge effort!

- A few irqchip drivers are made modular (broadcom, meson), because
  that's apparently a thing...

- A new driver for the Microchip External Interrupt Controller

- The irq_cpu_offline()/irq_cpu_online() API is now deprecated and
  can only be selected on the Cavium Octeon platform. Once this
  platform is removed, the API will be removed at the same time.

- A sprinkle of devm_* helper, as people seem to love that.

- The usual spattering of small fixes and minor improvements.

* tag 'irqchip-5.16': (912 commits)
  h8300: Fix linux/irqchip.h include mess
  dt-bindings: irqchip: renesas-irqc: Document r8a774e1 bindings
  MIPS: irq: Avoid an unused-variable error
  genirq: Hide irq_cpu_{on,off}line() behind a deprecated option
  irqchip/mips-gic: Get rid of the reliance on irq_cpu_online()
  MIPS: loongson64: Drop call to irq_cpu_offline()
  irq: remove handle_domain_{irq,nmi}()
  irq: remove CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
  irq: riscv: perform irqentry in entry code
  irq: openrisc: perform irqentry in entry code
  irq: csky: perform irqentry in entry code
  irq: arm64: perform irqentry in entry code
  irq: arm: perform irqentry in entry code
  irq: add a (temporary) CONFIG_HANDLE_DOMAIN_IRQ_IRQENTRY
  irq: nds32: avoid CONFIG_HANDLE_DOMAIN_IRQ
  irq: arc: avoid CONFIG_HANDLE_DOMAIN_IRQ
  irq: add generic_handle_arch_irq()
  irq: unexport handle_irq_desc()
  irq: simplify handle_domain_{irq,nmi}()
  irq: mips: simplify do_domain_IRQ()
  ...

Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211029083332.3680101-1-maz@kernel.org

1 files changed, 31 insertions, 9 deletions

diff --git a/drivers/s390/cio/css.c b/drivers/s390/cio/css.c
index 3377097e65de..44461928aab8 100644
--- a/drivers/s390/cio/css.c
+++ b/drivers/s390/cio/css.c
@@ -788,27 +788,49 @@ static int __unset_registered(struct device *dev, void *data)
 	return 0;
 }
 
-void css_schedule_eval_all_unreg(unsigned long delay)
+static int __unset_online(struct device *dev, void *data)
+{
+	struct idset *set = data;
+	struct subchannel *sch = to_subchannel(dev);
+	struct ccw_device *cdev = sch_get_cdev(sch);
+
+	if (cdev && cdev->online)
+		idset_sch_del(set, sch->schid);
+
+	return 0;
+}
+
+void css_schedule_eval_cond(enum css_eval_cond cond, unsigned long delay)
 {
 	unsigned long flags;
-	struct idset *unreg_set;
+	struct idset *set;
 
 	/* Find unregistered subchannels. */
-	unreg_set = idset_sch_new();
-	if (!unreg_set) {
+	set = idset_sch_new();
+	if (!set) {
 		/* Fallback. */
 		css_schedule_eval_all();
 		return;
 	}
-	idset_fill(unreg_set);
-	bus_for_each_dev(&css_bus_type, NULL, unreg_set, __unset_registered);
+	idset_fill(set);
+	switch (cond) {
+	case CSS_EVAL_UNREG:
+		bus_for_each_dev(&css_bus_type, NULL, set, __unset_registered);
+		break;
+	case CSS_EVAL_NOT_ONLINE:
+		bus_for_each_dev(&css_bus_type, NULL, set, __unset_online);
+		break;
+	default:
+		break;
+	}
+
 	/* Apply to slow_subchannel_set. */
 	spin_lock_irqsave(&slow_subchannel_lock, flags);
-	idset_add_set(slow_subchannel_set, unreg_set);
+	idset_add_set(slow_subchannel_set, set);
 	atomic_set(&css_eval_scheduled, 1);
 	queue_delayed_work(cio_work_q, &slow_path_work, delay);
 	spin_unlock_irqrestore(&slow_subchannel_lock, flags);
-	idset_free(unreg_set);
+	idset_free(set);
 }
 
 void css_wait_for_slow_path(void)
@@ -820,7 +842,7 @@ void css_wait_for_slow_path(void)
 void css_schedule_reprobe(void)
 {
 	/* Schedule with a delay to allow merging of subsequent calls. */
-	css_schedule_eval_all_unreg(1 * HZ);
+	css_schedule_eval_cond(CSS_EVAL_UNREG, 1 * HZ);
 }
 EXPORT_SYMBOL_GPL(css_schedule_reprobe);