From patchwork Wed Feb 3 17:57:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gustavo Pimentel X-Patchwork-Id: 12065049 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, 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 A7ACFC433DB for ; Wed, 3 Feb 2021 18:03:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5BFA264DAE for ; Wed, 3 Feb 2021 18:03:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232246AbhBCR66 (ORCPT ); Wed, 3 Feb 2021 12:58:58 -0500 Received: from smtprelay-out1.synopsys.com ([149.117.87.133]:40818 "EHLO smtprelay-out1.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232479AbhBCR6b (ORCPT ); Wed, 3 Feb 2021 12:58:31 -0500 Received: from mailhost.synopsys.com (mdc-mailhost2.synopsys.com [10.225.0.210]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by smtprelay-out1.synopsys.com (Postfix) with ESMTPS id 739BAC010E; Wed, 3 Feb 2021 17:57:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1612375050; bh=RPtJq9pnB6c2RL81eMcBv6mkc0ffZocP1N1iwYCqspQ=; h=From:To:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=ltqKhfPtIAlvAZMklZE/yTPmeeoq5TR+HfJkqtVKFf0P6+EzM9RQaeS+i8HV3DaBt LZKerbANIRg+pEzjmUiFgFET49X2lsimIsQLKP9sEvNbnI0cYt1+dNXt9w8iu6cPb8 5KDhRaqUeAt+r2PoBpNG2cS/CgCPKOSLg9LJPiTZiVjfRUoCflPiqX0v6Tk2zWod2X avM0MSl2ltAKn5DjCcit9EzOmmYDymBlo0BuZjeZB0qbIFH3GmKRHC/w+avJJjNLz0 yFB/lQcKE0UkO9vFWF/Jz9nkRgLGQ3joF5yITY/O8FUDqwxUfDry7VPhIFQ0OQoq/X lx4yCKJvZd3RA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost.synopsys.com (Postfix) with ESMTP id 3888DA005E; Wed, 3 Feb 2021 17:57:29 +0000 (UTC) X-SNPS-Relay: synopsys.com From: Gustavo Pimentel To: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, dmaengine@vger.kernel.org, Vinod Koul , Dan Williams , Bjorn Helgaas , Gustavo Pimentel Subject: [PATCH v3 15/15] dmaengine: dw-edma: Add pcim_iomap_table return checker Date: Wed, 3 Feb 2021 18:57:07 +0100 Message-Id: <9fcd7137c661d1a5e6b8e6441de7e903e2cfc069.1612374941.git.gustavo.pimentel@synopsys.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Detected by CoverityScan CID 16555 ("Dereference null return") Signed-off-by: Gustavo Pimentel --- drivers/dma/dw-edma/dw-edma-pcie.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/dma/dw-edma/dw-edma-pcie.c b/drivers/dma/dw-edma/dw-edma-pcie.c index 686b4ff..7445033 100644 --- a/drivers/dma/dw-edma/dw-edma-pcie.c +++ b/drivers/dma/dw-edma/dw-edma-pcie.c @@ -238,6 +238,9 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, dw->rd_ch_cnt = vsec_data.rd_ch_cnt; dw->rg_region.vaddr = pcim_iomap_table(pdev)[vsec_data.rg.bar]; + if (!dw->rg_region.vaddr) + return -ENOMEM; + dw->rg_region.vaddr += vsec_data.rg.off; dw->rg_region.paddr = pdev->resource[vsec_data.rg.bar].start; dw->rg_region.paddr += vsec_data.rg.off; @@ -250,12 +253,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, struct dw_edma_block *dt_block = &vsec_data.dt_wr[i]; ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar]; + if (!ll_region->vaddr) + return -ENOMEM; + ll_region->vaddr += ll_block->off; ll_region->paddr = pdev->resource[ll_block->bar].start; ll_region->paddr += ll_block->off; ll_region->sz = ll_block->sz; dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar]; + if (!dt_region->vaddr) + return -ENOMEM; + dt_region->vaddr += dt_block->off; dt_region->paddr = pdev->resource[dt_block->bar].start; dt_region->paddr += dt_block->off; @@ -269,12 +278,18 @@ static int dw_edma_pcie_probe(struct pci_dev *pdev, struct dw_edma_block *dt_block = &vsec_data.dt_rd[i]; ll_region->vaddr = pcim_iomap_table(pdev)[ll_block->bar]; + if (!ll_region->vaddr) + return -ENOMEM; + ll_region->vaddr += ll_block->off; ll_region->paddr = pdev->resource[ll_block->bar].start; ll_region->paddr += ll_block->off; ll_region->sz = ll_block->sz; dt_region->vaddr = pcim_iomap_table(pdev)[dt_block->bar]; + if (!dt_region->vaddr) + return -ENOMEM; + dt_region->vaddr += dt_block->off; dt_region->paddr = pdev->resource[dt_block->bar].start; dt_region->paddr += dt_block->off;