Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932852AbcKHJwZ (ORCPT ); Tue, 8 Nov 2016 04:52:25 -0500 Received: from mail-pf0-f195.google.com ([209.85.192.195]:33757 "EHLO mail-pf0-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932564AbcKHJwW (ORCPT ); Tue, 8 Nov 2016 04:52:22 -0500 Subject: Re: [PATCH v11 17/22] vfio_platform: Updated to use vfio_set_irqs_validate_and_prepare() To: Kirti Wankhede , alex.williamson@redhat.com, pbonzini@redhat.com, kraxel@redhat.com, cjia@nvidia.com References: <1478293856-8191-1-git-send-email-kwankhede@nvidia.com> <1478293856-8191-18-git-send-email-kwankhede@nvidia.com> Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, kevin.tian@intel.com, jike.song@intel.com, bjsdjshi@linux.vnet.ibm.com, linux-kernel@vger.kernel.org From: Alexey Kardashevskiy Message-ID: Date: Tue, 8 Nov 2016 19:52:57 +1100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <1478293856-8191-18-git-send-email-kwankhede@nvidia.com> Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2170 Lines: 75 On 05/11/16 08:10, Kirti Wankhede wrote: > Updated vfio_platform_common.c file to use > vfio_set_irqs_validate_and_prepare() > > Signed-off-by: Kirti Wankhede > Signed-off-by: Neo Jia > Change-Id: Id87cd6b78ae901610b39bf957974baa6f40cd7b0 > --- > drivers/vfio/platform/vfio_platform_common.c | 31 +++++++--------------------- > 1 file changed, 8 insertions(+), 23 deletions(-) > > diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c > index d78142830754..4c27f4be3c3d 100644 > --- a/drivers/vfio/platform/vfio_platform_common.c > +++ b/drivers/vfio/platform/vfio_platform_common.c > @@ -364,36 +364,21 @@ static long vfio_platform_ioctl(void *device_data, > struct vfio_irq_set hdr; > u8 *data = NULL; > int ret = 0; > + size_t data_size = 0; > > minsz = offsetofend(struct vfio_irq_set, count); > > if (copy_from_user(&hdr, (void __user *)arg, minsz)) > return -EFAULT; > > - if (hdr.argsz < minsz) > - return -EINVAL; > - > - if (hdr.index >= vdev->num_irqs) > - return -EINVAL; > - > - if (hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK | > - VFIO_IRQ_SET_ACTION_TYPE_MASK)) > - return -EINVAL; > - > - if (!(hdr.flags & VFIO_IRQ_SET_DATA_NONE)) { > - size_t size; > - > - if (hdr.flags & VFIO_IRQ_SET_DATA_BOOL) > - size = sizeof(uint8_t); > - else if (hdr.flags & VFIO_IRQ_SET_DATA_EVENTFD) > - size = sizeof(int32_t); > - else > - return -EINVAL; > - > - if (hdr.argsz - minsz < size) > - return -EINVAL; > + ret = vfio_set_irqs_validate_and_prepare(&hdr, vdev->num_irqs, > + vdev->num_irqs, &data_size); The patch does not change this but I am still curious: is not the second vdev->num_irqs supposed to be one of VFIO_PCI_INTX_IRQ_INDEX..VFIO_PCI_NUM_IRQS, not the actual number of interrupt vectors (as in vfio-pci)? > + if (ret) > + return ret; > > - data = memdup_user((void __user *)(arg + minsz), size); > + if (data_size) { > + data = memdup_user((void __user *)(arg + minsz), > + data_size); > if (IS_ERR(data)) > return PTR_ERR(data); > } > -- Alexey