linux-kernel - [PATCH] ARM: dma-mapping: Use kvzalloc in __iommu_alloc

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Message-Id: <20220615074146.912213-1-chi.minghao@zte.com.cn>
Date:   Wed, 15 Jun 2022 07:41:46 +0000
From:   cgel.zte@...il.com
To:     linux@...linux.org.uk
Cc:     logang@...tatee.com, martin.oliveira@...eticom.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: [PATCH] ARM: dma-mapping: Use kvzalloc in __iommu_alloc_buffer

From: Minghao Chi <chi.minghao@....com.cn>

Use kvzalloc() in __iommu_alloc_buffer() instead of open-coding it.

Reported-by: Zeal Robot <zealci@....com.cn>
Signed-off-by: Minghao Chi <chi.minghao@....com.cn>
---
 arch/arm/mm/dma-mapping.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 82ffac621854..940819eda182 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1208,10 +1208,7 @@ static struct page **__iommu_alloc_buffer(struct device *dev, size_t size,
 	int i = 0;
 	int order_idx = 0;
 
-	if (array_size <= PAGE_SIZE)
-		pages = kzalloc(array_size, GFP_KERNEL);
-	else
-		pages = vzalloc(array_size);
+	pages = kvzalloc(array_size, GFP_KERNEL);
 	if (!pages)
 		return NULL;
 
-- 
2.25.1