diff options
| author | Joerg Roedel <jroedel@suse.de> | 2014-07-08 14:15:45 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2014-07-10 15:36:27 +0200 |
| commit | c5db16ad6cc15c261639c0105cfff72df4122790 (patch) | |
| tree | cbca9e6f752c2aeb193076c21352c818f9318d86 /drivers/iommu | |
| parent | caf8a518d73e71c4073ef1bd5c369e80d27ebf2c (diff) | |
iommu/amd: Don't free pasid_state in mn_release path
The mmu_notifier state is part of pasid_state so it can't be
freed in the mn_release path. Free the pasid_state after
mmu_notifer_unregister has completed.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Tested-by: Oded Gabbay <Oded.Gabbay@amd.com>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu_v2.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu_v2.c b/drivers/iommu/amd_iommu_v2.c index 1fdd22c3bc04..a621552e715d 100644 --- a/drivers/iommu/amd_iommu_v2.c +++ b/drivers/iommu/amd_iommu_v2.c @@ -312,8 +312,6 @@ static void __unbind_pasid(struct pasid_state *pasid_state) /* Make sure no more pending faults are in the queue */ flush_workqueue(iommu_wq); - - put_pasid_state(pasid_state); /* Reference taken in bind() function */ } static void unbind_pasid(struct device_state *dev_state, int pasid) @@ -325,7 +323,7 @@ static void unbind_pasid(struct device_state *dev_state, int pasid) return; __unbind_pasid(pasid_state); - put_pasid_state_wait(pasid_state); /* Reference taken in this function */ + put_pasid_state(pasid_state); /* Reference taken in this function */ } static void free_pasid_states_level1(struct pasid_state **tbl) @@ -371,6 +369,9 @@ static void free_pasid_states(struct device_state *dev_state) * unbind the PASID */ mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); + + put_pasid_state_wait(pasid_state); /* Reference taken in + amd_iommu_pasid_bind */ } if (dev_state->pasid_levels == 2) @@ -690,6 +691,7 @@ out_unregister: mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); out_free: + mmput(pasid_state->mm); free_pasid_state(pasid_state); out: @@ -730,6 +732,8 @@ void amd_iommu_unbind_pasid(struct pci_dev *pdev, int pasid) /* This will call the mn_release function and unbind the PASID */ mmu_notifier_unregister(&pasid_state->mn, pasid_state->mm); + put_pasid_state_wait(pasid_state); /* Reference taken in + amd_iommu_pasid_bind */ out: put_device_state(dev_state); } |