swiotlb: avoid potential left shift overflow

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The second operand passed to slot_addr() is declared as int or unsigned int
in all call sites. The left-shift to get the offset of a slot can overflow
if swiotlb size is larger than 4G.

Convert the macro to an inline function and declare the second argument as
phys_addr_t to avoid the potential overflow.

Fixes: 26a7e09478 ("swiotlb: refactor swiotlb_tbl_map_single")
Signed-off-by: Chao Gao <chao.gao@intel.com>
Reviewed-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

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Chao Gao 2022-08-19 16:45:37 +08:00 • committed by Christoph Hellwig

parent 2995b8002c

commit 3f0461613e

1 changed files with 4 additions and 1 deletions

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kernel/dma/swiotlb.c

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