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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,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 71D6AC43381 for ; Tue, 12 Mar 2019 18:04:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 396FA205C9 for ; Tue, 12 Mar 2019 18:04:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552413885; bh=8Vw+/7V+NPQvteLRMVGxKVB1GrwgeuykL1Mgsvc4g7w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gvO8fU6rK3Ef86fI5IzoPJy7thc3YeyYW+x6A+a1kbmJKbcr17b3+S1QS9gxwJuQ8 ZwpTDqxo3oJyeea7R2cfJ/4/88eMWKkE0I713vNb68p2DgshfMueJTtD/QxJB/18H2 C01rK54MEc8DlUNI3mDEUHPzidWoaQlXwsM0bLDo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729145AbfCLSEn (ORCPT ); Tue, 12 Mar 2019 14:04:43 -0400 Received: from mail.kernel.org ([198.145.29.99]:48446 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727630AbfCLRMq (ORCPT ); Tue, 12 Mar 2019 13:12:46 -0400 Received: from localhost (unknown [104.133.8.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id B74BF217D4; Tue, 12 Mar 2019 17:12:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552410765; bh=8Vw+/7V+NPQvteLRMVGxKVB1GrwgeuykL1Mgsvc4g7w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RKJzwJkaV4AKrbjKagnbwe6q69ShF1OCNna7Z7F5Kdj7gQ6yWC2JhXavr2fnHgMj3 t9a2nDHK51fvczeJGjO+24tS9BRBtjeJ98g2iXpflM0Ui0Uj/HsVICDGKUEBB0ik0a RJZ9jbxGbrWQ2eAcHXpf3cXnEPpl2gmVB+uHI69w= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Zyngier , Sasha Levin Subject: [PATCH 4.20 099/171] irqchip/gic-v3-its: Gracefully fail on LPI exhaustion Date: Tue, 12 Mar 2019 10:07:59 -0700 Message-Id: <20190312170356.518402753@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312170347.868927101@linuxfoundation.org> References: <20190312170347.868927101@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.20-stable review patch. If anyone has any objections, please let me know. ------------------ [ 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 f25ec92f23ee..c3aba3fc818d 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