[Intel-gfx] [PATCH v10 09/10] vfio/pci: Copy hot-reset device info to userspace in the devices loop

[Jason Gunthorpe]

On Tue, Jul 18, 2023 at 03:55:41AM -0700, Yi Liu wrote:
> This copies the vfio_pci_dependent_device to userspace during looping each
> affected device for reporting vfio_pci_hot_reset_info. This avoids counting
> the affected devices and allocating a potential large buffer to store the
> vfio_pci_dependent_device of all the affected devices before copying them
> to userspace.
> 
> Suggested-by: Jason Gunthorpe <jgg at nvidia.com>
> Tested-by: Yanting Jiang <yanting.jiang at intel.com>
> Tested-by: Zhenzhong Duan <zhenzhong.duan at intel.com>
> Signed-off-by: Jason Gunthorpe <jgg at nvidia.com>
> Signed-off-by: Yi Liu <yi.l.liu at intel.com>
> ---
>  drivers/vfio/pci/vfio_pci_core.c | 93 ++++++++++++--------------------
>  1 file changed, 33 insertions(+), 60 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg at nvidia.com>

Jason