Date: Tue, 24 Mar 2015 12:46:22 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r280434 - head/sys/x86/iommu Message-ID: <201503241246.t2OCkMKA050595@svn.freebsd.org>
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Author: kib Date: Tue Mar 24 12:46:21 2015 New Revision: 280434 URL: https://svnweb.freebsd.org/changeset/base/280434 Log: Assert that the mapping loop makes progress. Sponsored by: The FreeBSD Foundation MFC after: 1 week Modified: head/sys/x86/iommu/intel_idpgtbl.c Modified: head/sys/x86/iommu/intel_idpgtbl.c ============================================================================== --- head/sys/x86/iommu/intel_idpgtbl.c Tue Mar 24 11:33:34 2015 (r280433) +++ head/sys/x86/iommu/intel_idpgtbl.c Tue Mar 24 12:46:21 2015 (r280434) @@ -465,6 +465,7 @@ 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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