This is a note to let you know that I've just added the patch titled
irqchip: irq-xtensa-mx: fix initial IRQ affinity
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
irqchip-irq-xtensa-mx-fix-initial-irq-affinity.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From a255ee29252066d621df5d6b420bf534c6ba5bc0 Mon Sep 17 00:00:00 2001
From: Max Filippov <jcmvbkbc@xxxxxxxxx>
Date: Tue, 26 Apr 2022 09:01:18 -0700
Subject: irqchip: irq-xtensa-mx: fix initial IRQ affinity
From: Max Filippov <jcmvbkbc@xxxxxxxxx>
commit a255ee29252066d621df5d6b420bf534c6ba5bc0 upstream.
When irq-xtensa-mx chip is used in non-SMP configuration its
irq_set_affinity callback is not called leaving IRQ affinity set empty.
As a result IRQ delivery does not work in that configuration.
Initialize IRQ affinity of the xtensa MX interrupt distributor to CPU 0
for all external IRQ lines.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/irqchip/irq-xtensa-mx.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
--- a/drivers/irqchip/irq-xtensa-mx.c
+++ b/drivers/irqchip/irq-xtensa-mx.c
@@ -151,14 +151,25 @@ static struct irq_chip xtensa_mx_irq_chi
.irq_set_affinity = xtensa_mx_irq_set_affinity,
};
+static void __init xtensa_mx_init_common(struct irq_domain *root_domain)
+{
+ unsigned int i;
+
+ irq_set_default_host(root_domain);
+ secondary_init_irq();
+
+ /* Initialize default IRQ routing to CPU 0 */
+ for (i = 0; i < XCHAL_NUM_EXTINTERRUPTS; ++i)
+ set_er(1, MIROUT(i));
+}
+
int __init xtensa_mx_init_legacy(struct device_node *interrupt_parent)
{
struct irq_domain *root_domain =
irq_domain_add_legacy(NULL, NR_IRQS - 1, 1, 0,
&xtensa_mx_irq_domain_ops,
&xtensa_mx_irq_chip);
- irq_set_default_host(root_domain);
- secondary_init_irq();
+ xtensa_mx_init_common(root_domain);
return 0;
}
@@ -168,8 +179,7 @@ static int __init xtensa_mx_init(struct
struct irq_domain *root_domain =
irq_domain_add_linear(np, NR_IRQS, &xtensa_mx_irq_domain_ops,
&xtensa_mx_irq_chip);
- irq_set_default_host(root_domain);
- secondary_init_irq();
+ xtensa_mx_init_common(root_domain);
return 0;
}
IRQCHIP_DECLARE(xtensa_mx_irq_chip, "cdns,xtensa-mx", xtensa_mx_init);
Patches currently in stable-queue which might be from jcmvbkbc@xxxxxxxxx are
queue-5.4/ptrace-xtensa-replace-pt_singlestep-with-tif_singlestep.patch
queue-5.4/irqchip-irq-xtensa-mx-fix-initial-irq-affinity.patch
