diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 35 |
1 files changed, 8 insertions, 27 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index a8a079ba9477..372e4f626138 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -482,43 +482,26 @@ static long vfio_unpin_pages_remote(struct vfio_dma *dma, dma_addr_t iova, static int vfio_pin_page_external(struct vfio_dma *dma, unsigned long vaddr, unsigned long *pfn_base, bool do_accounting) { - unsigned long limit; - bool lock_cap = has_capability(dma->task, CAP_IPC_LOCK); struct mm_struct *mm; int ret; - bool rsvd; mm = get_task_mm(dma->task); if (!mm) return -ENODEV; ret = vaddr_get_pfn(mm, vaddr, dma->prot, pfn_base); - if (ret) - goto pin_page_exit; - - rsvd = is_invalid_reserved_pfn(*pfn_base); - limit = task_rlimit(dma->task, RLIMIT_MEMLOCK) >> PAGE_SHIFT; - - if (!rsvd && !lock_cap && mm->locked_vm + 1 > limit) { - put_pfn(*pfn_base, dma->prot); - pr_warn("%s: Task %s (%d) RLIMIT_MEMLOCK (%ld) exceeded\n", - __func__, dma->task->comm, task_pid_nr(dma->task), - limit << PAGE_SHIFT); - ret = -ENOMEM; - goto pin_page_exit; - } - - if (!rsvd && do_accounting) { - ret = vfio_lock_acct(dma->task, 1, &lock_cap); + if (!ret && do_accounting && !is_invalid_reserved_pfn(*pfn_base)) { + ret = vfio_lock_acct(dma->task, 1, NULL); if (ret) { put_pfn(*pfn_base, dma->prot); - goto pin_page_exit; + if (ret == -ENOMEM) + pr_warn("%s: Task %s (%d) RLIMIT_MEMLOCK " + "(%ld) exceeded\n", __func__, + dma->task->comm, task_pid_nr(dma->task), + task_rlimit(dma->task, RLIMIT_MEMLOCK)); } } - ret = 1; - -pin_page_exit: mmput(mm); return ret; } @@ -598,10 +581,8 @@ static int vfio_iommu_type1_pin_pages(void *iommu_data, remote_vaddr = dma->vaddr + iova - dma->iova; ret = vfio_pin_page_external(dma, remote_vaddr, &phys_pfn[i], do_accounting); - if (ret <= 0) { - WARN_ON(!ret); + if (ret) goto pin_unwind; - } ret = vfio_add_to_pfn_list(dma, iova, phys_pfn[i]); if (ret) { |