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Commit ef198aaa authored by Kirti Wankhede's avatar Kirti Wankhede Committed by Alex Williamson
Browse files

vfio_pci: Updated to use vfio_set_irqs_validate_and_prepare() 



Updated vfio_pci.c file to use vfio_set_irqs_validate_and_prepare()

Signed-off-by: default avatarKirti Wankhede <kwankhede@nvidia.com>
Signed-off-by: default avatarNeo Jia <cjia@nvidia.com>
Signed-off-by: default avatarAlex Williamson <alex.williamson@redhat.com>
parent c747f08a

drivers/vfio/pci/vfio_pci.c

+7 −27
Original line number Diff line number Diff line
@@ -818,45 +818,25 @@ static long vfio_pci_ioctl(void *device_data, 


	} else if (cmd == VFIO_DEVICE_SET_IRQS) {

		struct vfio_irq_set hdr;

		size_t size;

		u8 *data = NULL;

		int max, 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 || hdr.index >= VFIO_PCI_NUM_IRQS ||

		    hdr.count >= (U32_MAX - hdr.start) ||

		    hdr.flags & ~(VFIO_IRQ_SET_DATA_TYPE_MASK |

				  VFIO_IRQ_SET_ACTION_TYPE_MASK))

			return -EINVAL;



		max = vfio_pci_get_irq_count(vdev, hdr.index);

		if (hdr.start >= max || hdr.start + hdr.count > max)

			return -EINVAL;



		switch (hdr.flags & VFIO_IRQ_SET_DATA_TYPE_MASK) {

		case VFIO_IRQ_SET_DATA_NONE:

			size = 0;

			break;

		case VFIO_IRQ_SET_DATA_BOOL:

			size = sizeof(uint8_t);

			break;

		case VFIO_IRQ_SET_DATA_EVENTFD:

			size = sizeof(int32_t);

			break;

		default:

			return -EINVAL;

		}



		if (size) {

			if (hdr.argsz - minsz < hdr.count * size)

				return -EINVAL;

		ret = vfio_set_irqs_validate_and_prepare(&hdr, max,

						 VFIO_PCI_NUM_IRQS, &data_size);

		if (ret)

			return ret;



		if (data_size) {

			data = memdup_user((void __user *)(arg + minsz),

					   hdr.count * size);

					    data_size);

			if (IS_ERR(data))

				return PTR_ERR(data);

		}