From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966202AbcKOJNb (ORCPT ); Tue, 15 Nov 2016 04:13:31 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:39287 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935704AbcKOJNK (ORCPT ); Tue, 15 Nov 2016 04:13:10 -0500 From: Christoph Hellwig To: tglx@linutronix.de Cc: linux-kernel@vger.kernel.org Subject: [PATCH] irq/affinity: fix irq_create_affinity_masks for the pre_vectors case Date: Tue, 15 Nov 2016 10:12:58 +0100 Message-Id: <1479201178-29604-2-git-send-email-hch@lst.de> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1479201178-29604-1-git-send-email-hch@lst.de> References: <1479201178-29604-1-git-send-email-hch@lst.de> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Adjust the exit condition for assigning the affinity vectors to take the pre_vectors into account. Otherwise the last vector will get a cpu mask for all CPUs by accidentally hitting the post_vectors case. Signed-off-by: Christoph Hellwig --- kernel/irq/affinity.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/kernel/irq/affinity.c b/kernel/irq/affinity.c index 17360bd..2ca420a 100644 --- a/kernel/irq/affinity.c +++ b/kernel/irq/affinity.c @@ -107,7 +107,9 @@ irq_create_affinity_masks(int nvecs, const struct irq_affinity *affd) /* Calculate the number of cpus per vector */ ncpus = cpumask_weight(nmsk); - for (v = 0; curvec < affv && v < vecs_to_assign; curvec++, v++) { + for (v = 0; + curvec < affd->pre_vectors + affv && v < vecs_to_assign; + curvec++, v++) { cpus_per_vec = ncpus / vecs_to_assign; /* Account for extra vectors to compensate rounding errors */ -- 2.1.4