From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752917AbdCMIsb (ORCPT ); Mon, 13 Mar 2017 04:48:31 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:40748 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752761AbdCMIqj (ORCPT ); Mon, 13 Mar 2017 04:46:39 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Alex Deucher Subject: [PATCH 4.10 54/75] drm/radeon: handle vfct with multiple vbios images Date: Mon, 13 Mar 2017 16:44:03 +0800 Message-Id: <20170313083414.409873076@linuxfoundation.org> X-Mailer: git-send-email 2.12.0 In-Reply-To: <20170313083411.408297387@linuxfoundation.org> References: <20170313083411.408297387@linuxfoundation.org> User-Agent: quilt/0.65 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.10-stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher commit a882f5de402ded769af74fbf276132f9c175049c upstream. The vfct table can contain multiple vbios images if the platform contains multiple GPUs. Noticed by netkas on phoronix forums. This patch fixes those platforms. Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/radeon/radeon_bios.c | 68 +++++++++++++++++++---------------- 1 file changed, 37 insertions(+), 31 deletions(-) --- a/drivers/gpu/drm/radeon/radeon_bios.c +++ b/drivers/gpu/drm/radeon/radeon_bios.c @@ -596,52 +596,58 @@ static bool radeon_read_disabled_bios(st #ifdef CONFIG_ACPI static bool radeon_acpi_vfct_bios(struct radeon_device *rdev) { - bool ret = false; struct acpi_table_header *hdr; acpi_size tbl_size; UEFI_ACPI_VFCT *vfct; - GOP_VBIOS_CONTENT *vbios; - VFCT_IMAGE_HEADER *vhdr; + unsigned offset; if (!ACPI_SUCCESS(acpi_get_table("VFCT", 1, &hdr))) return false; tbl_size = hdr->length; if (tbl_size < sizeof(UEFI_ACPI_VFCT)) { DRM_ERROR("ACPI VFCT table present but broken (too short #1)\n"); - goto out_unmap; + return false; } vfct = (UEFI_ACPI_VFCT *)hdr; - if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) > tbl_size) { - DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); - goto out_unmap; - } + offset = vfct->VBIOSImageOffset; - vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + vfct->VBIOSImageOffset); - vhdr = &vbios->VbiosHeader; - DRM_INFO("ACPI VFCT contains a BIOS for %02x:%02x.%d %04x:%04x, size %d\n", - vhdr->PCIBus, vhdr->PCIDevice, vhdr->PCIFunction, - vhdr->VendorID, vhdr->DeviceID, vhdr->ImageLength); - - if (vhdr->PCIBus != rdev->pdev->bus->number || - vhdr->PCIDevice != PCI_SLOT(rdev->pdev->devfn) || - vhdr->PCIFunction != PCI_FUNC(rdev->pdev->devfn) || - vhdr->VendorID != rdev->pdev->vendor || - vhdr->DeviceID != rdev->pdev->device) { - DRM_INFO("ACPI VFCT table is not for this card\n"); - goto out_unmap; + while (offset < tbl_size) { + GOP_VBIOS_CONTENT *vbios = (GOP_VBIOS_CONTENT *)((char *)hdr + offset); + VFCT_IMAGE_HEADER *vhdr = &vbios->VbiosHeader; + + offset += sizeof(VFCT_IMAGE_HEADER); + if (offset > tbl_size) { + DRM_ERROR("ACPI VFCT image header truncated\n"); + return false; + } + + offset += vhdr->ImageLength; + if (offset > tbl_size) { + DRM_ERROR("ACPI VFCT image truncated\n"); + return false; + } + + if (vhdr->ImageLength && + vhdr->PCIBus == rdev->pdev->bus->number && + vhdr->PCIDevice == PCI_SLOT(rdev->pdev->devfn) && + vhdr->PCIFunction == PCI_FUNC(rdev->pdev->devfn) && + vhdr->VendorID == rdev->pdev->vendor && + vhdr->DeviceID == rdev->pdev->device) { + rdev->bios = kmemdup(&vbios->VbiosContent, + vhdr->ImageLength, + GFP_KERNEL); + + if (!rdev->bios) { + kfree(rdev->bios); + return false; + } + return true; + } } - if (vfct->VBIOSImageOffset + sizeof(VFCT_IMAGE_HEADER) + vhdr->ImageLength > tbl_size) { - DRM_ERROR("ACPI VFCT image truncated\n"); - goto out_unmap; - } - - rdev->bios = kmemdup(&vbios->VbiosContent, vhdr->ImageLength, GFP_KERNEL); - ret = !!rdev->bios; - -out_unmap: - return ret; + DRM_ERROR("ACPI VFCT table present but broken (too short #2)\n"); + return false; } #else static inline bool radeon_acpi_vfct_bios(struct radeon_device *rdev)