linux-kernel - [PATCH v5 01/16] swiotlb: Fix the type of index

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Message-Id: <20210422081508.3942748-2-tientzu@chromium.org>
Date:   Thu, 22 Apr 2021 16:14:53 +0800
From:   Claire Chang <tientzu@...omium.org>
To:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Frank Rowand <frowand.list@...il.com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        boris.ostrovsky@...cle.com, jgross@...e.com,
        Christoph Hellwig <hch@....de>,
        Marek Szyprowski <m.szyprowski@...sung.com>
Cc:     benh@...nel.crashing.org, paulus@...ba.org,
        "list@....net:IOMMU DRIVERS" <iommu@...ts.linux-foundation.org>,
        sstabellini@...nel.org, Robin Murphy <robin.murphy@....com>,
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        Thierry Reding <treding@...dia.com>, mingo@...nel.org,
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        thomas.hellstrom@...ux.intel.com
Subject: [PATCH v5 01/16] swiotlb: Fix the type of index

Fix the type of index from unsigned int to int since find_slots() might
return -1.

Fixes: 0774983bc923 ("swiotlb: refactor swiotlb_tbl_map_single")
Signed-off-by: Claire Chang <tientzu@...omium.org>
---
 kernel/dma/swiotlb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index 0a5b6f7e75bc..8635a57f88e9 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -499,7 +499,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 {
 	struct io_tlb_mem *mem = io_tlb_default_mem;
 	unsigned int offset = swiotlb_align_offset(dev, orig_addr);
-	unsigned int index, i;
+	unsigned int i;
+	int index;
 	phys_addr_t tlb_addr;
 
 	if (!mem)
-- 
2.31.1.368.gbe11c130af-goog