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=unavailable 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 EB6A8C43381 for ; Thu, 28 Feb 2019 15:32:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB20720C01 for ; Thu, 28 Feb 2019 15:32:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551367942; bh=puQz6pze9auFEf+vST5L3GGErMSWWWuRP15X48FYse0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=E8FpDQx3+unZcSOyWyeasYZ2PhqhPfnQrPM80fwMqnonJi+eNgun2ydvJz9+KLgxZ fjRYeYyKXtAV3jXvypDHP7qH3CjwK45NLZvCDeTQwyKXEa84LAxV7N4FU+Awr27evL GDUVgpra/lX46yYXPcRmoVILjUxRp0T8i0nlToFE= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387560AbfB1PcV (ORCPT ); Thu, 28 Feb 2019 10:32:21 -0500 Received: from mail.kernel.org ([198.145.29.99]:41458 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387403AbfB1PJB (ORCPT ); Thu, 28 Feb 2019 10:09:01 -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 2838D218B0; Thu, 28 Feb 2019 15:09:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1551366540; bh=puQz6pze9auFEf+vST5L3GGErMSWWWuRP15X48FYse0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Iki1/tQpD2ePmQTt9x2esvD3XXyTcVhfPBfUmXxM76f1wsdjlNeIy75ZDr0qyVDmp B+ohs//oUkvzAA+0Yl31QcHx8HXdRB+Nw6cQVQs1ia9qZpXTbSe0V1kgPiZ1cN1/7q IsCUqFdGLmI018ZAG9DBy7oDHZGVJHolhwTxZM4I= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Marc Zyngier , Sasha Levin Subject: [PATCH AUTOSEL 4.20 30/81] irqchip/gic-v3-its: Gracefully fail on LPI exhaustion Date: Thu, 28 Feb 2019 10:07:22 -0500 Message-Id: <20190228150813.10256-30-sashal@kernel.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190228150813.10256-1-sashal@kernel.org> References: <20190228150813.10256-1-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 f25ec92f23ee2..c3aba3fc818d3 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -1586,6 +1586,9 @@ 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