author: Christophe Leroy <christophe.leroy@c-s.fr> 2019-06-24 07:20:14 +0000
committer: Herbert Xu <herbert@gondor.apana.org.au> 2019-07-03 22:13:11 +0800
commit: aeb87246537a83c2aff482f3f34a2e0991e02cbc
parent: e52d484d9869eb291140545746ccbe5ffc7c9306
Commit Summary:
Diffstat:
1 file changed, 5 insertions, 4 deletions
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index 739dc9fe2c55..f0757a67affe 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -678,17 +678,18 @@ static bool sg_miter_get_next_page(struct sg_mapping_iter *miter)
{
if (!miter->__remaining) {
struct scatterlist *sg;
- unsigned long pgoffset;
if (!__sg_page_iter_next(&miter->piter))
return false;
sg = miter->piter.sg;
- pgoffset = miter->piter.sg_pgoffset;
- miter->__offset = pgoffset ? 0 : sg->offset;
+ miter->__offset = miter->piter.sg_pgoffset ? 0 : sg->offset;
+ miter->piter.sg_pgoffset += miter->__offset >> PAGE_SHIFT;
+ miter->__offset &= PAGE_SIZE - 1;
miter->__remaining = sg->offset + sg->length -
- (pgoffset << PAGE_SHIFT) - miter->__offset;
+ (miter->piter.sg_pgoffset << PAGE_SHIFT) -
+ miter->__offset;
miter->__remaining = min_t(unsigned long, miter->__remaining,
PAGE_SIZE - miter->__offset);
}