svn commit: r280873 - stable/10/sys/x86/iommu
Konstantin Belousov
kib at FreeBSD.org
Tue Mar 31 00:55:13 UTC 2015
Author: kib
Date: Tue Mar 31 00:55:12 2015
New Revision: 280873
URL: https://svnweb.freebsd.org/changeset/base/280873
Log:
MFC r280434:
Assert that the mapping loop makes progress.
Modified:
stable/10/sys/x86/iommu/intel_idpgtbl.c
Directory Properties:
stable/10/ (props changed)
Modified: stable/10/sys/x86/iommu/intel_idpgtbl.c
==============================================================================
--- stable/10/sys/x86/iommu/intel_idpgtbl.c Tue Mar 31 00:18:00 2015 (r280872)
+++ stable/10/sys/x86/iommu/intel_idpgtbl.c Tue Mar 31 00:55:12 2015 (r280873)
@@ -464,6 +464,7 @@ ctx_map_buf_locked(struct dmar_ctx *ctx,
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,
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