Author: jhb
Date: Fri Jun 10 13:24:56 2011
New Revision: 222930
URL: http://svn.freebsd.org/changeset/base/222930
Log:
Fix some off-by-one errors with the ending address of candidate regions
when attempting to grow a window.
Modified:
head/sys/dev/pci/pci_pci.c
Modified: head/sys/dev/pci/pci_pci.c
==============================================================================
--- head/sys/dev/pci/pci_pci.c Fri Jun 10 12:30:16 2011 (r222929)
+++ head/sys/dev/pci/pci_pci.c Fri Jun 10 13:24:56 2011 (r222930)
@@ -916,7 +916,8 @@ pcib_grow_window(struct pcib_softc *sc,
/* Move end_free down until it is properly aligned. */
end_free &= ~(align - 1);
- front = end_free - count;
+ end_free--;
+ front = end_free - (count - 1);
/*
* The resource would now be allocated at (front,
@@ -944,7 +945,7 @@ pcib_grow_window(struct pcib_softc *sc,
/* Move start_free up until it is properly aligned. */
start_free = roundup2(start_free, align);
- back = start_free + count;
+ back = start_free + count - 1;
/*
* The resource would now be allocated at (start_free,
@@ -957,7 +958,7 @@ pcib_grow_window(struct pcib_softc *sc,
if (bootverbose)
printf("\tback candidate range: %#lx-%#lx\n",
start_free, back);
- back = roundup2(back, w->step) - 1;
+ back = roundup2(back + 1, w->step) - 1;
back -= rman_get_end(w->res);
} else
back = 0;
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