linux-kernel - [PATCH 2/2] iommu/arm-smmu-v3: simplify parse_driver

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Date:   Thu, 26 Dec 2019 18:51:41 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org,
        Joerg Roedel <joro@...tes.org>,
        iommu@...ts.linux-foundation.org
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] iommu/arm-smmu-v3: simplify parse_driver_options()

Using ARRAY_SIZE() instead of the sentinel is slightly simpler, IMHO.

Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
---

 drivers/iommu/arm-smmu-v3.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index ed9933960370..b27489b7f9d8 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -676,7 +676,6 @@ struct arm_smmu_option_prop {
 static const struct arm_smmu_option_prop arm_smmu_options[] = {
 	{ ARM_SMMU_OPT_SKIP_PREFETCH, "hisilicon,broken-prefetch-cmd" },
 	{ ARM_SMMU_OPT_PAGE0_REGS_ONLY, "cavium,cn9900-broken-page1-regspace"},
-	{ 0, NULL},
 };
 
 static inline void __iomem *arm_smmu_page1_fixup(unsigned long offset,
@@ -696,16 +695,16 @@ static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
 
 static void parse_driver_options(struct arm_smmu_device *smmu)
 {
-	int i = 0;
+	int i;
 
-	do {
+	for (i = 0; i < ARRAY_SIZE(arm_smmu_options); i++) {
 		if (of_property_read_bool(smmu->dev->of_node,
 						arm_smmu_options[i].prop)) {
 			smmu->options |= arm_smmu_options[i].opt;
 			dev_notice(smmu->dev, "option %s\n",
 				arm_smmu_options[i].prop);
 		}
-	} while (arm_smmu_options[++i].opt);
+	};
 }
 
 /* Low-level queue manipulation functions */
-- 
2.17.1