From patchwork Tue Jun 23 19:52:08 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 223067 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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_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 9CAB7C433DF for ; Tue, 23 Jun 2020 21:41:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 756FA2078A for ; Tue, 23 Jun 2020 21:41:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592948473; bh=lmLHg0cGesE3FgSe7bSUX6bN99oLY+825ZeXT/FLT/Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=gd8VrtlcbKn1C0WQVjFsGDz6q1RFEmEoN8Xy5iLkJBaV0xFHAY+B7pXFBqDLYSiYo hzgTtK31pP5bpQ6jJzRb4R5s17AaSUriVXrDEc0m5tw5czRNMtyWetWOao0wKI2r34 szc6ggINeXANkBiXm5mwT3K4UsJ1eVyB15jhlqF4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388488AbgFWVlE (ORCPT ); Tue, 23 Jun 2020 17:41:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:46400 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388457AbgFWUGV (ORCPT ); Tue, 23 Jun 2020 16:06:21 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 2E7F82064B; Tue, 23 Jun 2020 20:06:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592942780; bh=lmLHg0cGesE3FgSe7bSUX6bN99oLY+825ZeXT/FLT/Q=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bQ1+om0psmO0/6ksc4GxYxXXQSWngI8nbdmsF/BmSrDNKkgBXed2+QOnqtYLLfSfT 6Ad4crKMJ6lAqKL7TZPg9uzL1vI4mB3TnBJTEF5Muru9XoR/rW+ji01TVqJ/4VysPY EAXFkIun4KK+XqfNI0frxhS/jGa8LgvA/fVYZstk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Bjorn Andersson , Christoph Hellwig , Sasha Levin Subject: [PATCH 5.7 131/477] firmware: qcom_scm: fix bogous abuse of dma-direct internals Date: Tue, 23 Jun 2020 21:52:08 +0200 Message-Id: <20200623195413.798055671@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623195407.572062007@linuxfoundation.org> References: <20200623195407.572062007@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Christoph Hellwig [ Upstream commit 459b1f86f1cba7de813fbc335df476c111feec22 ] As far as the device is concerned the dma address is the physical address. There is no need to convert it to a physical address, especially not using dma-direct internals that are not available to drivers and which will interact badly with IOMMUs. Last but not least the commit introducing it claimed to just fix a type issue, but actually changed behavior. Fixes: 6e37ccf78a532 ("firmware: qcom_scm: Use proper types for dma mappings") Reviewed-by: Bjorn Andersson Signed-off-by: Christoph Hellwig Link: https://lore.kernel.org/r/20200414123136.441454-1-hch@lst.de Signed-off-by: Bjorn Andersson Signed-off-by: Sasha Levin --- drivers/firmware/qcom_scm.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c index 059bb0fbae9e5..4701487573f7b 100644 --- a/drivers/firmware/qcom_scm.c +++ b/drivers/firmware/qcom_scm.c @@ -6,7 +6,6 @@ #include #include #include -#include #include #include #include @@ -806,8 +805,7 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz, struct qcom_scm_mem_map_info *mem_to_map; phys_addr_t mem_to_map_phys; phys_addr_t dest_phys; - phys_addr_t ptr_phys; - dma_addr_t ptr_dma; + dma_addr_t ptr_phys; size_t mem_to_map_sz; size_t dest_sz; size_t src_sz; @@ -824,10 +822,9 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz, ptr_sz = ALIGN(src_sz, SZ_64) + ALIGN(mem_to_map_sz, SZ_64) + ALIGN(dest_sz, SZ_64); - ptr = dma_alloc_coherent(__scm->dev, ptr_sz, &ptr_dma, GFP_KERNEL); + ptr = dma_alloc_coherent(__scm->dev, ptr_sz, &ptr_phys, GFP_KERNEL); if (!ptr) return -ENOMEM; - ptr_phys = dma_to_phys(__scm->dev, ptr_dma); /* Fill source vmid detail */ src = ptr; @@ -855,7 +852,7 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz, ret = __qcom_scm_assign_mem(__scm->dev, mem_to_map_phys, mem_to_map_sz, ptr_phys, src_sz, dest_phys, dest_sz); - dma_free_coherent(__scm->dev, ptr_sz, ptr, ptr_dma); + dma_free_coherent(__scm->dev, ptr_sz, ptr, ptr_phys); if (ret) { dev_err(__scm->dev, "Assign memory protection call failed %d\n", ret);