* Patch "MIPS: BMIPS: Do not mask IPIs during suspend" has been added to the 4.9-stable tree
@ 2018-03-12 15:48 gregkh
0 siblings, 0 replies; only message in thread
From: gregkh @ 2018-03-12 15:48 UTC (permalink / raw)
To: justinpopo6, f.fainelli, gregkh, jhogan; +Cc: stable, stable-commits
This is a note to let you know that I've just added the patch titled
MIPS: BMIPS: Do not mask IPIs during suspend
to the 4.9-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:
mips-bmips-do-not-mask-ipis-during-suspend.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 06a3f0c9f2725f5d7c63c4203839373c9bd00c28 Mon Sep 17 00:00:00 2001
From: Justin Chen <justinpopo6@gmail.com>
Date: Wed, 27 Sep 2017 17:15:15 -0700
Subject: MIPS: BMIPS: Do not mask IPIs during suspend
From: Justin Chen <justinpopo6@gmail.com>
commit 06a3f0c9f2725f5d7c63c4203839373c9bd00c28 upstream.
Commit a3e6c1eff548 ("MIPS: IRQ: Fix disable_irq on CPU IRQs") fixes an
issue where disable_irq did not actually disable the irq. The bug caused
our IPIs to not be disabled, which actually is the correct behavior.
With the addition of commit a3e6c1eff548 ("MIPS: IRQ: Fix disable_irq on
CPU IRQs"), the IPIs were getting disabled going into suspend, thus
schedule_ipi() was not being called. This caused deadlocks where
schedulable task were not being scheduled and other cpus were waiting
for them to do something.
Add the IRQF_NO_SUSPEND flag so an irq_disable will not be called on the
IPIs during suspend.
Signed-off-by: Justin Chen <justinpopo6@gmail.com>
Fixes: a3e6c1eff548 ("MIPS: IRQ: Fix disabled_irq on CPU IRQs")
Cc: Florian Fainelli <f.fainelli@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17385/
[jhogan@kernel.org: checkpatch: wrap long lines and fix commit refs]
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/kernel/smp-bmips.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
--- a/arch/mips/kernel/smp-bmips.c
+++ b/arch/mips/kernel/smp-bmips.c
@@ -166,11 +166,11 @@ static void bmips_prepare_cpus(unsigned
return;
}
- if (request_irq(IPI0_IRQ, bmips_ipi_interrupt, IRQF_PERCPU,
- "smp_ipi0", NULL))
+ if (request_irq(IPI0_IRQ, bmips_ipi_interrupt,
+ IRQF_PERCPU | IRQF_NO_SUSPEND, "smp_ipi0", NULL))
panic("Can't request IPI0 interrupt");
- if (request_irq(IPI1_IRQ, bmips_ipi_interrupt, IRQF_PERCPU,
- "smp_ipi1", NULL))
+ if (request_irq(IPI1_IRQ, bmips_ipi_interrupt,
+ IRQF_PERCPU | IRQF_NO_SUSPEND, "smp_ipi1", NULL))
panic("Can't request IPI1 interrupt");
}
Patches currently in stable-queue which might be from justinpopo6@gmail.com are
queue-4.9/mips-bmips-do-not-mask-ipis-during-suspend.patch
^ permalink raw reply [flat|nested] only message in thread
only message in thread, other threads:[~2018-03-12 15:49 UTC | newest]
Thread overview: (only message) (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2018-03-12 15:48 Patch "MIPS: BMIPS: Do not mask IPIs during suspend" has been added to the 4.9-stable tree gregkh
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.