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From: vincent.donnefort@arm.com
To: peterz@infradead.org, tglx@linutronix.de
Cc: linux-kernel@vger.kernel.org, valentin.schneider@arm.com,
	Vincent Donnefort <vincent.donnefort@arm.com>
Subject: [PATCH v2 1/3] cpu/hotplug: Allowing to reset fail injection
Date: Tue, 16 Feb 2021 10:35:04 +0000	[thread overview]
Message-ID: <20210216103506.416286-2-vincent.donnefort@arm.com> (raw)
In-Reply-To: <20210216103506.416286-1-vincent.donnefort@arm.com>

From: Vincent Donnefort <vincent.donnefort@arm.com>

Currently, the only way of resetting the fail injection is to trigger a
hotplug, hotunplug or both. This is rather annoying for testing
and, as the default value for this file is -1, it seems pretty natural to
let a user write it.

Signed-off-by: Vincent Donnefort <vincent.donnefort@arm.com>

diff --git a/kernel/cpu.c b/kernel/cpu.c
index 4e11e91010e1..093f96fb0824 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -2200,6 +2200,11 @@ static ssize_t write_cpuhp_fail(struct device *dev,
 	if (ret)
 		return ret;
 
+	if (fail == CPUHP_INVALID) {
+		st->fail = fail;
+		return count;
+	}
+
 	if (fail < CPUHP_OFFLINE || fail > CPUHP_ONLINE)
 		return -EINVAL;
 
-- 
2.25.1


  reply	other threads:[~2021-02-16 10:36 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-16 10:35 [PATCH v2 0/3] cpu/hotplug: rollback and "fail" interface fixes vincent.donnefort
2021-02-16 10:35 ` vincent.donnefort [this message]
2021-03-02  9:01   ` [tip: sched/core] cpu/hotplug: Allowing to reset fail injection tip-bot2 for Vincent Donnefort
2021-03-03  9:49   ` tip-bot2 for Vincent Donnefort
2021-03-06 11:42   ` tip-bot2 for Vincent Donnefort
2021-02-16 10:35 ` [PATCH v2 2/3] cpu/hotplug: CPUHP_BRINGUP_CPU failure exception vincent.donnefort
2021-03-02  9:01   ` [tip: sched/core] " tip-bot2 for Vincent Donnefort
2021-03-03  9:49   ` tip-bot2 for Vincent Donnefort
2021-03-06 11:42   ` tip-bot2 for Vincent Donnefort
2021-02-16 10:35 ` [PATCH v2 3/3] cpu/hotplug: Add cpuhp_invoke_callback_range() vincent.donnefort
2021-03-02  9:01   ` [tip: sched/core] " tip-bot2 for Vincent Donnefort
2021-03-03  9:49   ` tip-bot2 for Vincent Donnefort
2021-03-06 11:42   ` tip-bot2 for Vincent Donnefort

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