linux-kernel - [tip:irq/core] genirq/cpuhotplug: Dont claim success on error

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Date:   Thu, 22 Jun 2017 09:54:19 -0700
From:   tip-bot for Thomas Gleixner <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     peterz@...radead.org, keith.busch@...el.com, mpe@...erman.id.au,
        hch@....de, marc.zyngier@....com, hpa@...or.com,
        tglx@...utronix.de, mingo@...nel.org, axboe@...nel.dk,
        linux-kernel@...r.kernel.org
Subject: [tip:irq/core] genirq/cpuhotplug: Dont claim success on error

Commit-ID:  735c09524d3e7c92315e8e2699a1b9acb4fb415c
Gitweb:     http://git.kernel.org/tip/735c09524d3e7c92315e8e2699a1b9acb4fb415c
Author:     Thomas Gleixner <tglx@...utronix.de>
AuthorDate: Tue, 20 Jun 2017 01:37:26 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 22 Jun 2017 18:21:16 +0200

genirq/cpuhotplug: Dont claim success on error

In case the affinity of an interrupt was broken, a printk is emitted.

But if the affinity cannot be set at all due to a missing
irq_set_affinity() callback or due to a failing callback, the message is
still printed preceeded by a warning/error.

That makes no sense whatsoever.

Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: Jens Axboe <axboe@...nel.dk>
Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Michael Ellerman <mpe@...erman.id.au>
Cc: Keith Busch <keith.busch@...el.com>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Christoph Hellwig <hch@....de>
Link: http://lkml.kernel.org/r/20170619235445.274852976@linutronix.de

---
 kernel/irq/cpuhotplug.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/irq/cpuhotplug.c b/kernel/irq/cpuhotplug.c
index 7051398..9c5521b 100644
--- a/kernel/irq/cpuhotplug.c
+++ b/kernel/irq/cpuhotplug.c
@@ -37,11 +37,14 @@ static bool migrate_one_irq(struct irq_desc *desc)
 	c = irq_data_get_irq_chip(d);
 	if (!c->irq_set_affinity) {
 		pr_debug("IRQ%u: unable to set affinity\n", d->irq);
+		ret = false;
 	} else {
 		int r = irq_do_set_affinity(d, affinity, false);
-		if (r)
+		if (r) {
 			pr_warn_ratelimited("IRQ%u: set affinity failed(%d).\n",
 					    d->irq, r);
+			ret = false;
+		}
 	}
 
 	return ret;