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

[Claire Chang <tientzu@xxxxxxxxxxxx>]

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@xxxxxxxxxxxx>
---
 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