linux-kernel - [PATCH 5.10 138/289] swiotlb: Fix the type of index

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Date:   Mon, 17 May 2021 16:01:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Christoph Hellwig <hch@....de>,
        Claire Chang <tientzu@...omium.org>,
        Konrad Rzeszutek Wilk <konrad@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.10 138/289] swiotlb: Fix the type of index

From: Claire Chang <tientzu@...omium.org>

[ Upstream commit 95b079d8215b83b37fa59341fda92fcb9392f14a ]

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

Fixes: 26a7e094783d ("swiotlb: refactor swiotlb_tbl_map_single")
Reviewed-by: Christoph Hellwig <hch@....de>
Signed-off-by: Claire Chang <tientzu@...omium.org>
Signed-off-by: Konrad Rzeszutek Wilk <konrad@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.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 ba4055a192e4..0f61b14b0099 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -563,7 +563,8 @@ phys_addr_t swiotlb_tbl_map_single(struct device *dev, phys_addr_t orig_addr,
 		enum dma_data_direction dir, unsigned long attrs)
 {
 	unsigned int offset = swiotlb_align_offset(dev, orig_addr);
-	unsigned int index, i;
+	unsigned int i;
+	int index;
 	phys_addr_t tlb_addr;
 
 	if (no_iotlb_memory)
-- 
2.30.2