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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97F67C433EF for ; Tue, 16 Nov 2021 01:06:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 82598615E6 for ; Tue, 16 Nov 2021 01:06:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232292AbhKPBJu (ORCPT ); Mon, 15 Nov 2021 20:09:50 -0500 Received: from mail.kernel.org ([198.145.29.99]:44630 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S245461AbhKOTUf (ORCPT ); Mon, 15 Nov 2021 14:20:35 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 496D96354A; Mon, 15 Nov 2021 18:35:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1637001309; bh=hYQE+7hJEdA+L5jYAWSJucXNU7vGHmO4eYdauqdSTVc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RcuTHqoKg+ne8tCvbhcV0EczYsAp2iepm8NhQRbsQlhLwM8l9Gi908QLIy6chOxBE NbfBWbHGvYkmCGNNvoYrM/RkL/a25JWdGbrIo74jrMKqEnsprT8AroHhs0fq+GoB29 a3gAwIS0PCLEF40HLBBAR2L7ccjgPSbXPYyGg54A= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ira Weiny , Jonathan Cameron , Dan Williams Subject: [PATCH 5.15 142/917] cxl/pci: Fix NULL vs ERR_PTR confusion Date: Mon, 15 Nov 2021 17:53:57 +0100 Message-Id: <20211115165433.576582526@linuxfoundation.org> X-Mailer: git-send-email 2.33.1 In-Reply-To: <20211115165428.722074685@linuxfoundation.org> References: <20211115165428.722074685@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Williams commit ca76a3a8052b71c0334d5c094859cfa340c290a8 upstream. cxl_pci_map_regblock() may return an ERR_PTR(), but cxl_pci_setup_regs() is only prepared for NULL as the error case. Pick the minimal fix for -stable backport purposes and just have cxl_pci_map_regblock() return NULL for errors. Fixes: f8a7e8c29be8 ("cxl/pci: Reserve all device regions at once") Cc: Reviewed-by: Ira Weiny Reviewed-by: Jonathan Cameron Link: https://lore.kernel.org/r/163433325724.834522.17809774578178224149.stgit@dwillia2-desk3.amr.corp.intel.com Signed-off-by: Dan Williams Signed-off-by: Greg Kroah-Hartman --- drivers/cxl/pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/cxl/pci.c +++ b/drivers/cxl/pci.c @@ -972,7 +972,7 @@ static void __iomem *cxl_mem_map_regbloc if (pci_resource_len(pdev, bar) < offset) { dev_err(dev, "BAR%d: %pr: too small (offset: %#llx)\n", bar, &pdev->resource[bar], (unsigned long long)offset); - return IOMEM_ERR_PTR(-ENXIO); + return NULL; } addr = pci_iomap(pdev, bar, 0);