svn commit: r262924 - head/sys/arm/at91

[Warner Losh]

Author: imp
Date: Sat Mar  8 06:06:42 2014
New Revision: 262924
URL: http://svnweb.freebsd.org/changeset/base/262924

Log:
  Properly round on unmapping.

Modified:
  head/sys/arm/at91/at91.c

Modified: head/sys/arm/at91/at91.c
==============================================================================
--- head/sys/arm/at91/at91.c	Sat Mar  8 05:03:56 2014	(r262923)
+++ head/sys/arm/at91/at91.c	Sat Mar  8 06:06:42 2014	(r262924)
@@ -84,8 +84,12 @@ at91_bs_unmap(void *t, bus_space_handle_
 {
 	vm_offset_t va, endva;
 
+	if (t == 0)
+		return;
 	va = trunc_page((vm_offset_t)t);
-	endva = va + round_page(size);
+	if (va >= AT91_BASE && va <= AT91_BASE + 0xff00000)
+		return;
+	endva = round_page((vm_offset_t)t + size);
 
 	/* Free the kernel virtual mapping. */
 	kva_free(va, endva - va);