mirror of
https://github.com/torvalds/linux
synced 2024-09-18 18:18:17 +00:00
6a7e448c6b
The current logic for handling resets is more complicated than it needs to be. The deferred_reset flag is used to indicate a reset is needed and the deferred_reset_state is the requested, post-reset, state. Also, the deferred_reset logic was added to vfio migration drivers to prevent a circular locking dependency with respect to mm_lock and state mutex. This is mainly because of the copy_to/from_user() functions(which takes mm_lock) invoked under state mutex. Remove all of the deferred reset logic and just pass the requested next state to pds_vfio_reset() so it can be used for VMM and DSC initiated resets. This removes the need for pds_vfio_state_mutex_lock(), so remove that and replace its use with a simple mutex_unlock(). Also, remove the reset_mutex as it's no longer needed since the state_mutex can be the driver's primary protector. Suggested-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Reviewed-by: Shannon Nelson <shannon.nelson@amd.com> Signed-off-by: Brett Creeley <brett.creeley@amd.com> Link: https://lore.kernel.org/r/20240308182149.22036-3-brett.creeley@amd.com Signed-off-by: Alex Williamson <alex.williamson@redhat.com> |
||
|---|---|---|
| .. | ||
| cdx | ||
| fsl-mc | ||
| mdev | ||
| pci | ||
| platform | ||
| container.c | ||
| debugfs.c | ||
| device_cdev.c | ||
| group.c | ||
| iommufd.c | ||
| Kconfig | ||
| Makefile | ||
| vfio.h | ||
| vfio_iommu_spapr_tce.c | ||
| vfio_iommu_type1.c | ||
| vfio_main.c | ||
| virqfd.c | ||