swiotlb: fix swiotlb_bounce() to do partial sync's correctly

PR sync from: Kaixiong Yu yukaixiong@huawei.com
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/MZWILYIUM7RSF5XGEKXPVDRFPBQHOM6M/
Merge mainline commit e8068f2d756d("swiotlb: fix swiotlb_bounce() to do partial sync's correctly") and af133562d5a("swiotlb: extend buffer pre-padding to alloc_align_mask if necessary")

Michael Kelley (1):
swiotlb: fix swiotlb_bounce() to do partial sync's correctly

Petr Tesarik (1):
swiotlb: extend buffer pre-padding to alloc_align_mask if necessary

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2.34.1

GVPopenEuler/kernel