Commit a9cda7c0 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'irq_urgent_for_v6.12_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull irq fix from Borislav Petkov:

 - Make sure GICv3 controller interrupt activation doesn't race with a
   concurrent deactivation due to propagation delays of the register
   write

* tag 'irq_urgent_for_v6.12_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/gic-v3: Force propagation of the active state with a read-back
parents 28e43197 464cb98f

drivers/irqchip/irq-gic-v3.c

+7 −0
Original line number Diff line number Diff line
@@ -524,6 +524,13 @@ static int gic_irq_set_irqchip_state(struct irq_data *d, 
	}



	gic_poke_irq(d, reg);



	/*

	 * Force read-back to guarantee that the active state has taken

	 * effect, and won't race with a guest-driven deactivation.

	 */

	if (reg == GICD_ISACTIVER)

		gic_peek_irq(d, reg);

	return 0;

}