From 08e9b3fd9c49b72294e32d9d90a4e2d0de26cda0 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Tue, 5 Jul 2016 14:25:59 +0100 Subject: [PATCH] irqchip/mips-gic: Map to VPs using HW VPNum When mapping an interrupt to a VP(E) we must use the identifier for the VP that the hardware expects, and this does not always match up with the Linux CPU number. Commit a9960b1c5260 ("irqchip: mips-gic: Use HW IDs for VPE_OTHER_ADDR") corrected this for the cases that existed at the time it was written, but commit b68705177d8a ("irqchip/mips-gic: Add a IPI hierarchy domain") added another case before the former patch was merged. This leads to incorrectly using Linux CPU numbers when mapping interrupts to VPs, which breaks on certain systems such as those with multi-core I6400 CPUs. Fix by adding the appropriate call to mips_cm_vp_id() to retrieve the expected VP identifier. Fixes: a9960b1c5260 ("irqchip: mips-gic: Use HW IDs for VPE_OTHER_ADDR") Fixes: b68705177d8a ("irqchip/mips-gic: Add a IPI hierarchy domain") Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Cc: Jason Cooper Cc: Qais Yousef Cc: Ralf Baechle Cc: Marc Zyngier Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/20160705132600.27730-1-paul.burton@imgtec.com Signed-off-by: Thomas Gleixner --- drivers/irqchip/irq-mips-gic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/irqchip/irq-mips-gic.c b/drivers/irqchip/irq-mips-gic.c index 8a4adbeb2b8cd..69b1b8275e4f1 100644 --- a/drivers/irqchip/irq-mips-gic.c +++ b/drivers/irqchip/irq-mips-gic.c @@ -718,7 +718,7 @@ static int gic_shared_irq_domain_map(struct irq_domain *d, unsigned int virq, spin_lock_irqsave(&gic_lock, flags); gic_map_to_pin(intr, gic_cpu_pin); - gic_map_to_vpe(intr, vpe); + gic_map_to_vpe(intr, mips_cm_vp_id(vpe)); for (i = 0; i < min(gic_vpes, NR_CPUS); i++) clear_bit(intr, pcpu_masks[i].pcpu_mask); set_bit(intr, pcpu_masks[vpe].pcpu_mask); -- 2.39.5