diff options
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/ipmmu-vmsa.c | 42 |
1 files changed, 21 insertions, 21 deletions
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 5a350582f359..1711fd306d33 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -324,6 +324,19 @@ static int ipmmu_domain_allocate_context(struct ipmmu_vmsa_device *mmu, return ret; } +static void ipmmu_domain_free_context(struct ipmmu_vmsa_device *mmu, + unsigned int context_id) +{ + unsigned long flags; + + spin_lock_irqsave(&mmu->lock, flags); + + clear_bit(context_id, mmu->ctx); + mmu->domains[context_id] = NULL; + + spin_unlock_irqrestore(&mmu->lock, flags); +} + static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain) { u64 ttbr; @@ -353,22 +366,22 @@ static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain) */ domain->cfg.iommu_dev = domain->mmu->dev; - domain->iop = alloc_io_pgtable_ops(ARM_32_LPAE_S1, &domain->cfg, - domain); - if (!domain->iop) - return -EINVAL; - /* * Find an unused context. */ ret = ipmmu_domain_allocate_context(domain->mmu, domain); - if (ret == IPMMU_CTX_MAX) { - free_io_pgtable_ops(domain->iop); + if (ret == IPMMU_CTX_MAX) return -EBUSY; - } domain->context_id = ret; + domain->iop = alloc_io_pgtable_ops(ARM_32_LPAE_S1, &domain->cfg, + domain); + if (!domain->iop) { + ipmmu_domain_free_context(domain->mmu, domain->context_id); + return -EINVAL; + } + /* TTBR0 */ ttbr = domain->cfg.arm_lpae_s1_cfg.ttbr[0]; ipmmu_ctx_write(domain, IMTTLBR0, ttbr); @@ -409,19 +422,6 @@ static int ipmmu_domain_init_context(struct ipmmu_vmsa_domain *domain) return 0; } -static void ipmmu_domain_free_context(struct ipmmu_vmsa_device *mmu, - unsigned int context_id) -{ - unsigned long flags; - - spin_lock_irqsave(&mmu->lock, flags); - - clear_bit(context_id, mmu->ctx); - mmu->domains[context_id] = NULL; - - spin_unlock_irqrestore(&mmu->lock, flags); -} - static void ipmmu_domain_destroy_context(struct ipmmu_vmsa_domain *domain) { /* |