From 99acb7936660843090ea8a9f22d2d50d9433e0de Mon Sep 17 00:00:00 2001
From: Thomas Hellstrom <thomas-at-tungstengraphics-dot-com>
Date: Fri, 8 Sep 2006 17:24:38 +0200
Subject: Various bugfixes.

---
 linux-core/drm_compat.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'linux-core/drm_compat.c')

diff --git a/linux-core/drm_compat.c b/linux-core/drm_compat.c
index 86bae306..162e4656 100644
--- a/linux-core/drm_compat.c
+++ b/linux-core/drm_compat.c
@@ -59,9 +59,14 @@ static inline void change_pte_range(struct mm_struct *mm, pmd_t * pmd,
 	do {
 		if (pte_present(*pte)) {
 			pte_t ptent;
-			ptent = *pte;
 			ptep_get_and_clear(mm, addr, pte);
+			ptent = *pte;
 			lazy_mmu_prot_update(ptent);
+		} else {
+			ptep_get_and_clear(mm, addr, pte);
+		}
+		if (!pte_none(*pte)) {
+		  DRM_ERROR("Ugh. Pte was presen\n");
 		}
 	} while (pte++, addr += PAGE_SIZE, addr != end);
 	pte_unmap(pte - 1);
-- 
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