From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52179C43381 for ; Thu, 28 Feb 2019 15:25:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1FAEC20C01 for ; Thu, 28 Feb 2019 15:25:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551367543; bh=pyIHm1OMxn5PMWT9zdddpsrXlmlsprzgCyuxqEd+KiA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Efc0vqQdtzRixilnO2F7SEOF/HOMRdJRgpLUraSa8iaR6HVDZx6ytjqVP5Fw2T9LU H4zFAYDzyA8NCZNQz44d4ZoSVoIYu6p49ypRCsu0CqrwP1I8sYPHR3zUKXS3BIrqkB oKRG2xNMhOhX77IrVFPLqGfRKekCfaGu1yuvT1Tk= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388103AbfB1PLx (ORCPT ); Thu, 28 Feb 2019 10:11:53 -0500 Received: from mail.kernel.org ([198.145.29.99]:45088 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388064AbfB1PLr (ORCPT ); Thu, 28 Feb 2019 10:11:47 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CE1F2218D8; Thu, 28 Feb 2019 15:11:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551366707; bh=pyIHm1OMxn5PMWT9zdddpsrXlmlsprzgCyuxqEd+KiA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q6mdl1NetC8SIPWTXW/4loZoM+ZVEz9TaUkAlPjLWgFVTP3ZFlZKozAmEK/+tG60V HlRuqmWljzWBQnY+pQMEgYdI5jt0DXkEHhm2PtXSL0ahHEtX/4v1hnEtDcFOJmEvku /A+VwXEbcDU4wPJ8wmiFY160v1LR8NZQ1UrQX75E= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Marc Zyngier , Sasha Levin Subject: [PATCH AUTOSEL 4.19 22/64] irqchip/gic-v3-its: Gracefully fail on LPI exhaustion Date: Thu, 28 Feb 2019 10:10:23 -0500 Message-Id: <20190228151105.11277-22-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190228151105.11277-1-sashal@kernel.org> References: <20190228151105.11277-1-sashal@kernel.org> MIME-Version: 1.0 X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marc Zyngier [ Upstream commit 45725e0fc3e7fe52fedb94f59806ec50e9618682 ] In the unlikely event that we cannot find any available LPI in the system, we should gracefully return an error instead of carrying on with no LPI allocated at all. Fixes: 38dd7c494cf6 ("irqchip/gic-v3-its: Drop chunk allocation compatibility") Signed-off-by: Marc Zyngier Signed-off-by: Sasha Levin --- drivers/irqchip/irq-gic-v3-its.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index d9a8801083156..15579cba1a882 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -1581,6 +1581,9 @@ static unsigned long *its_lpi_alloc(int nr_irqs, u32 *base, int *nr_ids) nr_irqs /= 2; } while (nr_irqs > 0); + if (!nr_irqs) + err = -ENOSPC; + if (err) goto out; -- 2.19.1