[PATCH v3 3/3] drm/etnaviv: Improve VA, PA, SIZE alignment checking

[Sui Jingfeng]

Alignment checking is only needed to be done in the upper caller function.
If those address and sizes are able to pass the check, it will certainly
pass the same test in the etnaviv_context_unmap() function. We don't need
examine it more than once.

Remove redundant alignment tests, move the those useless to upper caller
function.

Signed-off-by: Sui Jingfeng <sui.jingfeng at linux.dev>
---
 drivers/gpu/drm/etnaviv/etnaviv_mmu.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
index ff90bf85c156..df5192083b20 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.c
@@ -19,12 +19,6 @@ static void etnaviv_context_unmap(struct etnaviv_iommu_context *context,
 	size_t unmapped_page, unmapped = 0;
 	size_t pgsize = SZ_4K;
 
-	if (!IS_ALIGNED(iova | size, pgsize)) {
-		pr_err("unaligned: iova 0x%lx size 0x%zx min_pagesz 0x%zx\n",
-		       iova, size, pgsize);
-		return;
-	}
-
 	while (unmapped < size) {
 		unmapped_page = context->global->ops->unmap(context, iova,
 							    pgsize);
@@ -45,12 +39,6 @@ static int etnaviv_context_map(struct etnaviv_iommu_context *context,
 	size_t orig_size = size;
 	int ret = 0;
 
-	if (!IS_ALIGNED(iova | paddr | size, pgsize)) {
-		pr_err("unaligned: iova 0x%lx pa %pa size 0x%zx min_pagesz 0x%zx\n",
-		       iova, &paddr, size, pgsize);
-		return -EINVAL;
-	}
-
 	while (size) {
 		ret = context->global->ops->map(context, iova, paddr, pgsize,
 						prot);
@@ -88,6 +76,14 @@ static int etnaviv_iommu_map(struct etnaviv_iommu_context *context,
 
 		VERB("map[%d]: %08x %pap(%x)", i, da, &pa, bytes);
 
+		if (!IS_ALIGNED(iova | pa | bytes, SZ_4K)) {
+			dev_err(context->global->dev,
+				"unaligned: iova 0x%x pa %pa size 0x%x\n",
+				iova, &pa, bytes);
+			ret = -EINVAL;
+			goto fail;
+		}
+
 		ret = etnaviv_context_map(context, da, pa, bytes, prot);
 		if (ret)
 			goto fail;
-- 
2.34.1