From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50456) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5zaY-00017I-8e for qemu-devel@nongnu.org; Thu, 26 May 2016 14:00:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b5zaW-00010g-7m for qemu-devel@nongnu.org; Thu, 26 May 2016 14:00:53 -0400 Received: from mx1.redhat.com ([209.132.183.28]:48352) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b5zaV-00010a-Vo for qemu-devel@nongnu.org; Thu, 26 May 2016 14:00:52 -0400 Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 7599664D1B for ; Thu, 26 May 2016 18:00:51 +0000 (UTC) From: Alex Williamson Date: Thu, 26 May 2016 12:00:50 -0600 Message-ID: <20160526180050.13473.16191.stgit@gimli.home> In-Reply-To: <20160526175810.13473.82479.stgit@gimli.home> References: <20160526175810.13473.82479.stgit@gimli.home> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] [PULL 03/11] vfio/pci: Fix return of vfio_populate_vga() List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann This function returns success if either we setup the VGA region or the host vfio doesn't return enough regions to support the VGA index. This latter case doesn't make any sense. If we're asked to populate VGA, fail if it doesn't exist and let the caller decide if that's important. Signed-off-by: Alex Williamson Reviewed-by: Gerd Hoffmann Tested-by: Gerd Hoffmann --- hw/vfio/pci.c | 55 ++++++++++++++++++++++++++----------------------------- 1 file changed, 26 insertions(+), 29 deletions(-) diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index d091d8c..dfce313 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -2061,42 +2061,39 @@ int vfio_populate_vga(VFIOPCIDevice *vdev) struct vfio_region_info *reg_info; int ret; - if (vbasedev->num_regions > VFIO_PCI_VGA_REGION_INDEX) { - ret = vfio_get_region_info(vbasedev, - VFIO_PCI_VGA_REGION_INDEX, ®_info); - if (ret) { - return ret; - } + ret = vfio_get_region_info(vbasedev, VFIO_PCI_VGA_REGION_INDEX, ®_info); + if (ret) { + return ret; + } - if (!(reg_info->flags & VFIO_REGION_INFO_FLAG_READ) || - !(reg_info->flags & VFIO_REGION_INFO_FLAG_WRITE) || - reg_info->size < 0xbffff + 1) { - error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx", - (unsigned long)reg_info->flags, - (unsigned long)reg_info->size); - g_free(reg_info); - return -EINVAL; - } + if (!(reg_info->flags & VFIO_REGION_INFO_FLAG_READ) || + !(reg_info->flags & VFIO_REGION_INFO_FLAG_WRITE) || + reg_info->size < 0xbffff + 1) { + error_report("vfio: Unexpected VGA info, flags 0x%lx, size 0x%lx", + (unsigned long)reg_info->flags, + (unsigned long)reg_info->size); + g_free(reg_info); + return -EINVAL; + } - vdev->vga = g_new0(VFIOVGA, 1); + vdev->vga = g_new0(VFIOVGA, 1); - vdev->vga->fd_offset = reg_info->offset; - vdev->vga->fd = vdev->vbasedev.fd; + vdev->vga->fd_offset = reg_info->offset; + vdev->vga->fd = vdev->vbasedev.fd; - g_free(reg_info); + g_free(reg_info); - vdev->vga->region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE; - vdev->vga->region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM; - QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_MEM].quirks); + vdev->vga->region[QEMU_PCI_VGA_MEM].offset = QEMU_PCI_VGA_MEM_BASE; + vdev->vga->region[QEMU_PCI_VGA_MEM].nr = QEMU_PCI_VGA_MEM; + QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_MEM].quirks); - vdev->vga->region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE; - vdev->vga->region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO; - QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_LO].quirks); + vdev->vga->region[QEMU_PCI_VGA_IO_LO].offset = QEMU_PCI_VGA_IO_LO_BASE; + vdev->vga->region[QEMU_PCI_VGA_IO_LO].nr = QEMU_PCI_VGA_IO_LO; + QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_LO].quirks); - vdev->vga->region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE; - vdev->vga->region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI; - QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].quirks); - } + vdev->vga->region[QEMU_PCI_VGA_IO_HI].offset = QEMU_PCI_VGA_IO_HI_BASE; + vdev->vga->region[QEMU_PCI_VGA_IO_HI].nr = QEMU_PCI_VGA_IO_HI; + QLIST_INIT(&vdev->vga->region[QEMU_PCI_VGA_IO_HI].quirks); return 0; }