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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-17 18:27:50 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-17 18:27:50 +0100 |
| commit | 203f80f1c4187b2d5b3a282586fa6cc6d9503d4b (patch) | |
| tree | 6d7e40be803253ee58c682165187deaad8277e57 /lib | |
| parent | Merge tag 'mmc-v4.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ul... (diff) | |
| parent | swiotlb: ensure that page-sized mappings are page-aligned (diff) | |
| download | linux-203f80f1c4187b2d5b3a282586fa6cc6d9503d4b.tar.xz linux-203f80f1c4187b2d5b3a282586fa6cc6d9503d4b.zip | |
Merge branch 'stable/for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb
Pull swiotlb fix from Konrad Rzeszutek Wilk:
"A tiny fix to make sure that page-sized mappings are page-aligned (and
not say straddle two pages). This is important for some drivers (such
as NVME)"
* 'stable/for-linus-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
swiotlb: ensure that page-sized mappings are page-aligned
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/swiotlb.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/swiotlb.c b/lib/swiotlb.c index 975b8fc4f1e1..a8d74a733a38 100644 --- a/lib/swiotlb.c +++ b/lib/swiotlb.c @@ -483,11 +483,11 @@ phys_addr_t swiotlb_tbl_map_single(struct device *hwdev, : 1UL << (BITS_PER_LONG - IO_TLB_SHIFT); /* - * For mappings greater than a page, we limit the stride (and - * hence alignment) to a page size. + * For mappings greater than or equal to a page, we limit the stride + * (and hence alignment) to a page size. */ nslots = ALIGN(size, 1 << IO_TLB_SHIFT) >> IO_TLB_SHIFT; - if (size > PAGE_SIZE) + if (size >= PAGE_SIZE) stride = (1 << (PAGE_SHIFT - IO_TLB_SHIFT)); else stride = 1; |