swiotlb: simplify swiotlb_max_segment

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Remove the bogus Xen override that was usually larger than the actual
size and just calculate the value on demand.  Note that
swiotlb_max_segment still doesn't make sense as an interface and should
eventually be removed.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>

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This commit is contained in:

Christoph Hellwig 2022-02-14 11:44:42 +01:00

parent 3469d36d47

commit a2daa27c0c

3 changed files with 3 additions and 20 deletions

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2

drivers/xen/swiotlb-xen.c

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1

include/linux/swiotlb.h

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20

kernel/dma/swiotlb.c

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