linux-kernel - [PATCH 4.18 040/158] x86/apic/vector: Make error return value negative

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Message-Id: <20180917211713.024734634@linuxfoundation.org>
Date:   Tue, 18 Sep 2018 00:41:10 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH 4.18 040/158] x86/apic/vector: Make error return value negative

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Thomas Gleixner <tglx@...utronix.de>

commit 47b7360ce563e18c524ce92b55fb4da72b3b3578 upstream.

activate_managed() returns EINVAL instead of -EINVAL in case of
error. While this is unlikely to happen, the positive return value would
cause further malfunction at the call site.

Fixes: 2db1f959d9dc ("x86/vector: Handle managed interrupts proper")
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/x86/kernel/apic/vector.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/arch/x86/kernel/apic/vector.c
+++ b/arch/x86/kernel/apic/vector.c
@@ -422,7 +422,7 @@ static int activate_managed(struct irq_d
 	if (WARN_ON_ONCE(cpumask_empty(vector_searchmask))) {
 		/* Something in the core code broke! Survive gracefully */
 		pr_err("Managed startup for irq %u, but no CPU\n", irqd->irq);
-		return EINVAL;
+		return -EINVAL;
 	}
 
 	ret = assign_managed_vector(irqd, vector_searchmask);