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,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 B9656C4360F for ; Tue, 12 Mar 2019 17:15:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 803FA2183F for ; Tue, 12 Mar 2019 17:15:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552410942; bh=OHDs3zdTczPUcYzBfCvuy1uaFmgIWqDgdaBdOlUF3C4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=lYv995GUbEVNvyV5xt47k/OcI79016kikMDZvOTA7lq6E4l+WBSyaGWItvvhkMcu1 Z9Jgoxw6TNvrn6MySwI/SYyztQ70otX0nUxmu0d/rVEexB21XYOxRMG+/sZyJrwpSO hpt+/YZ3pXVLvXFiflG9ZUHt0Jy/Jfx+J7JpV0s8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728840AbfCLRPl (ORCPT ); Tue, 12 Mar 2019 13:15:41 -0400 Received: from mail.kernel.org ([198.145.29.99]:54448 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728538AbfCLROx (ORCPT ); Tue, 12 Mar 2019 13:14:53 -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 6C2272171F; Tue, 12 Mar 2019 17:14:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552410893; bh=OHDs3zdTczPUcYzBfCvuy1uaFmgIWqDgdaBdOlUF3C4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zxoF1gBIH0KR0lz++4ZnOMyBXznHhnVqpr6D/PXzpyoJ7OvBnO3tzXXATpZ/oU01M MMfHSiqhYe6Ptw5VD83LZ6n7kyH5Zgv8KT+dUJkoqZRecKQ8XYLeTrZ8z9QIn73bVw 1yYkSPhzN/4IchIfSFU7qH/uGQuuu9T5Pb04UDxs= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Marc Zyngier , Sasha Levin Subject: [PATCH 4.19 083/149] irqchip/gic-v3-its: Gracefully fail on LPI exhaustion Date: Tue, 12 Mar 2019 10:08:21 -0700 Message-Id: <20190312170356.680239192@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312170349.421581206@linuxfoundation.org> References: <20190312170349.421581206@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 4.19-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 d9a880108315..15579cba1a88 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