Searched hist:"3 dd59a7d" (Results 1 – 2 of 2) sorted by relevance
/openbmc/linux/drivers/vfio/ |
H A D | vfio.h | 3dd59a7d Fri Oct 07 09:04:41 CDT 2022 Jason Gunthorpe <jgg@nvidia.com> vfio: Make the group FD disassociate from the iommu_group
Allow the vfio_group struct to exist with a NULL iommu_group pointer. When the pointer is NULL the vfio_group users promise not to touch the iommu_group. This allows a driver to be hot unplugged while userspace is keeping the group FD open.
Remove all the code waiting for the group FD to close.
This fixes a userspace regression where we learned that virtnodedevd leaves a group FD open even though the /dev/ node for it has been deleted and all the drivers for it unplugged.
Fixes: ca5f21b25749 ("vfio: Follow a strict lifetime for struct iommu_group") Reported-by: Christian Borntraeger <borntraeger@linux.ibm.com> Tested-by: Matthew Rosato <mjrosato@linux.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Tested-by: Eric Farman <farman@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/3-v2-15417f29324e+1c-vfio_group_disassociate_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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H A D | vfio_main.c | 3dd59a7d Fri Oct 07 09:04:41 CDT 2022 Jason Gunthorpe <jgg@nvidia.com> vfio: Make the group FD disassociate from the iommu_group
Allow the vfio_group struct to exist with a NULL iommu_group pointer. When the pointer is NULL the vfio_group users promise not to touch the iommu_group. This allows a driver to be hot unplugged while userspace is keeping the group FD open.
Remove all the code waiting for the group FD to close.
This fixes a userspace regression where we learned that virtnodedevd leaves a group FD open even though the /dev/ node for it has been deleted and all the drivers for it unplugged.
Fixes: ca5f21b25749 ("vfio: Follow a strict lifetime for struct iommu_group") Reported-by: Christian Borntraeger <borntraeger@linux.ibm.com> Tested-by: Matthew Rosato <mjrosato@linux.ibm.com> Tested-by: Christian Borntraeger <borntraeger@de.ibm.com> Tested-by: Eric Farman <farman@linux.ibm.com> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/3-v2-15417f29324e+1c-vfio_group_disassociate_jgg@nvidia.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
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