From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757093AbdJKIBZ (ORCPT ); Wed, 11 Oct 2017 04:01:25 -0400 Received: from lelnx194.ext.ti.com ([198.47.27.80]:33200 "EHLO lelnx194.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756206AbdJKIA5 (ORCPT ); Wed, 11 Oct 2017 04:00:57 -0400 From: Kishon Vijay Abraham I To: Robin Murphy , Christoph Hellwig , Rob Herring , Mark Rutland CC: Kishon Vijay Abraham I , Bjorn Helgaas , , , , , Subject: [PATCH] of: Devices with pci_epf_bus_type require DMA configuration Date: Wed, 11 Oct 2017 13:30:41 +0530 Message-ID: <20171011080041.12918-1-kishon@ti.com> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 Content-Type: text/plain X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org pci-epc-core.c invokes of_dma_configure in order to configure the coherent_dma_mask/dma_mask of endpoint function device. This is required for dma_alloc_coherent to succeed in pci function driver (pci-epf-test.c). However after commit 723288836628bc1c08 ("of: restrict DMA configuration"), of_dma_configure doesn't configure the coherent_dma_mask/dma_mask of endpoint function device (since it doesn't have dma-ranges property), resulting in dma_alloc_coherent in pci endpoint function driver to to fail. Fix it by making sure of_dma_configure configures coherent_dma_mask/dma_mask irrespective of whether the node has dma-ranges property or not. Fixes: 723288836628bc1c08 ("of: restrict DMA configuration") Signed-off-by: Kishon Vijay Abraham I --- drivers/of/device.c | 4 +++- drivers/pci/endpoint/pci-epf-core.c | 3 +-- include/linux/pci-epf.h | 1 + 3 files changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/of/device.c b/drivers/of/device.c index 64b710265d39..881cf80a3d69 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include @@ -105,7 +106,8 @@ int of_dma_configure(struct device *dev, struct device_node *np) #ifdef CONFIG_ARM_AMBA dev->bus != &amba_bustype && #endif - dev->bus != &platform_bus_type) + dev->bus != &platform_bus_type && + dev->bus != &pci_epf_bus_type) return ret == -ENODEV ? 0 : ret; dma_addr = offset = 0; diff --git a/drivers/pci/endpoint/pci-epf-core.c b/drivers/pci/endpoint/pci-epf-core.c index ae1611a62808..6f354ec6be71 100644 --- a/drivers/pci/endpoint/pci-epf-core.c +++ b/drivers/pci/endpoint/pci-epf-core.c @@ -26,7 +26,6 @@ #include #include -static struct bus_type pci_epf_bus_type; static const struct device_type pci_epf_type; /** @@ -344,7 +343,7 @@ static int pci_epf_device_remove(struct device *dev) return ret; } -static struct bus_type pci_epf_bus_type = { +struct bus_type pci_epf_bus_type = { .name = "pci-epf", .match = pci_epf_device_match, .probe = pci_epf_device_probe, diff --git a/include/linux/pci-epf.h b/include/linux/pci-epf.h index 60d551a9a1ba..83a3fb7e6ac1 100644 --- a/include/linux/pci-epf.h +++ b/include/linux/pci-epf.h @@ -16,6 +16,7 @@ #include #include +extern struct bus_type pci_epf_bus_type; struct pci_epf; enum pci_barno { -- 2.11.0