[tip: irq/core] irqchip/armada-370-xp: Refactor handling IPI interrupts

[tip-bot2 for Marek Behún]

The following commit has been merged into the irq/core branch of tip:

Commit-ID:     47b6575630ebd6f2b5742a5cbdacd126f36b29b4
Gitweb:        https://git.kernel.org/tip/47b6575630ebd6f2b5742a5cbdacd126f36b29b4
Author:        Marek Behún <kabel@xxxxxxxxxx>
AuthorDate:    Thu, 11 Jul 2024 13:57:48 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Mon, 29 Jul 2024 10:57:23 +02:00

irqchip/armada-370-xp: Refactor handling IPI interrupts

Refactor the handling of IPI interrupts
- put into own function mpic_handle_ipi_irq(), similar to
  mpic_handle_msi_irq()
- rename the variable holding the doorbell cause register to "cause"
- retype and rename the variable holding the IPI HW IRQ number to
  "irq_hw_number_t i"

Signed-off-by: Marek Behún <kabel@xxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Andrew Lunn <andrew@xxxxxxx>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20240711115748.30268-11-kabel@xxxxxxxxxx

---
 drivers/irqchip/irq-armada-370-xp.c | 30 ++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
index 5c2631f..d42c7a1 100644
--- a/drivers/irqchip/irq-armada-370-xp.c
+++ b/drivers/irqchip/irq-armada-370-xp.c
@@ -619,6 +619,22 @@ static void mpic_handle_msi_irq(void)
 static void mpic_handle_msi_irq(void) {}
 #endif
 
+#ifdef CONFIG_SMP
+static void mpic_handle_ipi_irq(void)
+{
+	unsigned long cause;
+	irq_hw_number_t i;
+
+	cause = readl_relaxed(per_cpu_int_base + MPIC_IN_DRBEL_CAUSE);
+	cause &= IPI_DOORBELL_MASK;
+
+	for_each_set_bit(i, &cause, IPI_DOORBELL_END)
+		generic_handle_domain_irq(mpic_ipi_domain, i);
+}
+#else
+static inline void mpic_handle_ipi_irq(void) {}
+#endif
+
 static void mpic_handle_cascade_irq(struct irq_desc *desc)
 {
 	struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -669,19 +685,9 @@ static void __exception_irq_entry mpic_handle_irq(struct pt_regs *regs)
 		if (irqnr == 1)
 			mpic_handle_msi_irq();
 
-#ifdef CONFIG_SMP
 		/* IPI Handling */
-		if (irqnr == 0) {
-			unsigned long ipimask;
-			int ipi;
-
-			ipimask = readl_relaxed(per_cpu_int_base + MPIC_IN_DRBEL_CAUSE) &
-				  IPI_DOORBELL_MASK;
-
-			for_each_set_bit(ipi, &ipimask, IPI_DOORBELL_END)
-				generic_handle_domain_irq(mpic_ipi_domain, ipi);
-		}
-#endif
+		if (irqnr == 0)
+			mpic_handle_ipi_irq();
 	} while (1);
 }