From: Robin Murphy Date: Mon, 15 Aug 2022 16:15:55 +0000 (+0100) Subject: iommu/io-pgtable-arm: Remove iommu_dev==NULL special case X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=ca25ec247aadbff98083e92c5e79c198a16cd2db;p=linux.git iommu/io-pgtable-arm: Remove iommu_dev==NULL special case The special case to allow iommu_dev==NULL in __arm_lpae_alloc_pages() is confusing to static checkers (and possibly readers in general), since it's not obvious that that is only intended for the selftests. However it only serves to get around the dev_to_node() call, and we can easily fake up enough to make that work anyway, so let's simply remove this consideration from the normal flow and punt the responsibility over to the test harness itself. Reported-by: Rustam Subkhankulov Signed-off-by: Robin Murphy Link: https://lore.kernel.org/r/e2095eeda305071cb56c2cb8ac8a82dc3bd4dcab.1660580155.git.robin.murphy@arm.com Signed-off-by: Joerg Roedel --- diff --git a/drivers/iommu/io-pgtable-arm.c b/drivers/iommu/io-pgtable-arm.c index 94ff319ae8acc..873a92bbd80c3 100644 --- a/drivers/iommu/io-pgtable-arm.c +++ b/drivers/iommu/io-pgtable-arm.c @@ -200,8 +200,7 @@ static void *__arm_lpae_alloc_pages(size_t size, gfp_t gfp, void *pages; VM_BUG_ON((gfp & __GFP_HIGHMEM)); - p = alloc_pages_node(dev ? dev_to_node(dev) : NUMA_NO_NODE, - gfp | __GFP_ZERO, order); + p = alloc_pages_node(dev_to_node(dev), gfp | __GFP_ZERO, order); if (!p) return NULL; @@ -1343,12 +1342,17 @@ static int __init arm_lpae_do_selftests(void) }; int i, j, pass = 0, fail = 0; + struct device dev; struct io_pgtable_cfg cfg = { .tlb = &dummy_tlb_ops, .oas = 48, .coherent_walk = true, + .iommu_dev = &dev, }; + /* __arm_lpae_alloc_pages() merely needs dev_to_node() to work */ + set_dev_node(&dev, NUMA_NO_NODE); + for (i = 0; i < ARRAY_SIZE(pgsize); ++i) { for (j = 0; j < ARRAY_SIZE(ias); ++j) { cfg.pgsize_bitmap = pgsize[i];