From: Michael Kelley <mhklinux@outlook.com>
Date: Thu, 2 Apr 2026 20:23:59 +0000 (-0700)
Subject: genirq/chip: Invoke add_interrupt_randomness() in handle_percpu_devid_irq()
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fd7400cfcbaaa1f3d1b904711d9daf029e996364;p=thirdparty%2Flinux.git

genirq/chip: Invoke add_interrupt_randomness() in handle_percpu_devid_irq()

handle_percpu_devid_irq() is a version of handle_percpu_irq() but with the
addition of a pointer to a per-CPU devid.

However, handle_percpu_irq() invokes add_interrupt_randomness(), while
handle_percpu_devid_irq() currently does not.

Add the missing add_interrupt_randomness(), as it is needed when per-CPU
interrupts with devid's are used in VMs for interrupts from the hypervisor.

Signed-off-by: Michael Kelley <mhklinux@outlook.com>
Signed-off-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260402202400.1707-2-mhklkml@zohomail.com
---

diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 6147a07d0127a..6c9b1dc4e7d46 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -14,6 +14,7 @@
 #include <linux/interrupt.h>
 #include <linux/kernel_stat.h>
 #include <linux/irqdomain.h>
+#include <linux/random.h>
 
 #include <trace/events/irq.h>
 
@@ -929,6 +930,8 @@ void handle_percpu_devid_irq(struct irq_desc *desc)
 			    enabled ? " and unmasked" : "", irq, cpu);
 	}
 
+	add_interrupt_randomness(irq);
+
 	if (chip->irq_eoi)
 		chip->irq_eoi(&desc->irq_data);
 }