linux-kernel - [PATCH v1 1/2] swiotlb: Use wrap_area

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Message-Id: <5c7da4c21a8ba72422567dd157533d062b75024c.1679382779.git.petr.tesarik.ext@huawei.com>
Date:   Tue, 21 Mar 2023 09:31:26 +0100
From:   Petr Tesarik <petrtesarik@...weicloud.com>
To:     Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        Jianxiong Gao <jxgao@...gle.com>,
        David Stevens <stevensd@...omium.org>,
        Joerg Roedel <jroedel@...e.de>,
        iommu@...ts.linux.dev (open list:DMA MAPPING HELPERS),
        linux-kernel@...r.kernel.org (open list)
Cc:     Roberto Sassu <roberto.sassu@...wei.com>, petr@...arici.cz
Subject: [PATCH v1 1/2] swiotlb: Use wrap_area_index() instead of open-coding it

From: Petr Tesarik <petr.tesarik.ext@...wei.com>

No functional change, just use an existing helper.

Signed-off-by: Petr Tesarik <petr.tesarik.ext@...wei.com>
---
 kernel/dma/swiotlb.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 91454b513db0..3856e2b524b4 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -695,10 +695,7 @@ static int swiotlb_do_find_slots(struct device *dev, int area_index,
 	/*
 	 * Update the indices to avoid searching in the next round.
 	 */
-	if (index + nslots < mem->area_nslabs)
-		area->index = index + nslots;
-	else
-		area->index = 0;
+	area->index = wrap_area_index(mem, index + nslots);
 	area->used += nslots;
 	spin_unlock_irqrestore(&area->lock, flags);
 	return slot_index;
-- 
2.39.2