diff options
Diffstat (limited to 'drivers/iommu/iommu-debug.c')
| -rw-r--r-- | drivers/iommu/iommu-debug.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/iommu/iommu-debug.c b/drivers/iommu/iommu-debug.c index b8155c9227d3..c21846c1f8d5 100644 --- a/drivers/iommu/iommu-debug.c +++ b/drivers/iommu/iommu-debug.c @@ -1491,6 +1491,10 @@ static ssize_t iommu_debug_pte_read(struct file *file, char __user *ubuf, ssize_t retval; size_t buflen; + if (kptr_restrict != 0) { + pr_err("kptr_restrict needs to be disabled.\n"); + return -EPERM; + } if (!dev->archdata.mapping) { pr_err("No mapping. Did you already attach?\n"); return -EINVAL; @@ -1610,6 +1614,10 @@ static ssize_t iommu_debug_dma_atos_read(struct file *file, char __user *ubuf, ssize_t retval; size_t buflen; + if (kptr_restrict != 0) { + pr_err("kptr_restrict needs to be disabled.\n"); + return -EPERM; + } if (!dev->archdata.mapping) { pr_err("No mapping. Did you already attach?\n"); return -EINVAL; |