From: Philipp Zabel <p.zabel@pengutronix.de>
Date: Tue, 15 May 2018 16:09:15 +0200
Subject: drm/etnaviv: mmuv2: use memset32 to init scratch page
Git-commit: 6ae9c84ff249f2756086e71405375fd06124cf1f
Patch-mainline: v4.19-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

Replace the open-coded scratch page initialization loop with memset32

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c |    9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

--- a/drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_iommu_v2.c
@@ -119,8 +119,7 @@ static size_t etnaviv_iommuv2_unmap(stru
 
 static int etnaviv_iommuv2_init(struct etnaviv_iommuv2_domain *etnaviv_domain)
 {
-	u32 *p;
-	int ret, i;
+	int ret;
 
 	/* allocate scratch page */
 	etnaviv_domain->base.bad_page_cpu =
@@ -131,9 +130,9 @@ static int etnaviv_iommuv2_init(struct e
 		ret = -ENOMEM;
 		goto fail_mem;
 	}
-	p = etnaviv_domain->base.bad_page_cpu;
-	for (i = 0; i < SZ_4K / 4; i++)
-		*p++ = 0xdead55aa;
+
+	memset32(etnaviv_domain->base.bad_page_cpu, 0xdead55aa,
+		 SZ_4K / sizeof(u32));
 
 	etnaviv_domain->pta_cpu = dma_alloc_wc(etnaviv_domain->base.dev,
 					       SZ_4K, &etnaviv_domain->pta_dma,