Author: marcel
Date: Thu May 24 20:24:49 2012
New Revision: 235930
URL: http://svn.freebsd.org/changeset/base/235930
Log:
Preset (clear) the ranges we're supposed to fill from the FDT. If a
particular range (either I/O memory or I/O port) is not defined in
the FDT, we're not handing uninitialized structures back to our caller.
Modified:
head/sys/dev/fdt/fdt_pci.c
Modified: head/sys/dev/fdt/fdt_pci.c
==============================================================================
--- head/sys/dev/fdt/fdt_pci.c Thu May 24 20:12:46 2012 (r235929)
+++ head/sys/dev/fdt/fdt_pci.c Thu May 24 20:24:49 2012 (r235930)
@@ -100,6 +100,14 @@ fdt_pci_ranges_decode(phandle_t node, st
size_cells);
tuples = len / tuple_size;
+ /*
+ * Initialize the ranges so that we don't have to worry about
+ * having them all defined in the FDT. In particular, it is
+ * perfectly fine not to want I/O space on PCI busses.
+ */
+ bzero(io_space, sizeof(*io_space));
+ bzero(mem_space, sizeof(*mem_space));
+
rangesptr = &ranges[0];
offset_cells = 0;
for (i = 0; i < tuples; i++) {
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