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Assert that the mapping loop makes progress.

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Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2015-03-24 12:46:21 +00:00
parent cb552e880d
commit a3d78402d2
1 changed files with 1 additions and 0 deletions
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1
sys/x86/iommu/intel_idpgtbl.c
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@ -465,6 +465,7 @@ ctx_map_buf_locked(struct dmar_ctx *ctx, dmar_gaddr_t base, dmar_gaddr_t size,
KASSERT(size >= pg_sz,
("mapping loop overflow %p %jx %jx %jx", ctx,
(uintmax_t)base, (uintmax_t)size, (uintmax_t)pg_sz));
KASSERT(pg_sz > 0, ("pg_sz 0 lvl %d", lvl));
pte = ctx_pgtbl_map_pte(ctx, base, lvl, flags, &idx, &sf);
if (pte == NULL) {
KASSERT((flags & DMAR_PGF_WAITOK) == 0,