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PCI: rphahp: Fix endianess issues

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Numerical values stored in the device tree are encoded in Big Endian and
should be byte swapped when running in Little Endian.

The RPA hotplug module should convert those values as well.

Note that in rpaphp_get_drc_props(), the comparison between indexes[i+1]
and *index is done using the BE values (whatever is the current endianess).
This doesn't matter since we are checking for equality here.  This way only
the returned value is byte swapped.

RPA also made RTAS calls which implies BE values to be used.  According to
the patch done in RTAS (http://patchwork.ozlabs.org/patch/336865), no
additional conversion is required in RPA.

Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Laurent Dufour 2014-04-10 15:02:13 +02:00 committed by Bjorn Helgaas
parent 374a914043
commit 761ce53330
1 changed files with 9 additions and 6 deletions
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15
drivers/pci/hotplug/rpaphp_core.c
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@ -223,16 +223,16 @@ int rpaphp_get_drc_props(struct device_node *dn, int *drc_index,
type_tmp = (char *) &types[1];
/* Iterate through parent properties, looking for my-drc-index */
for (i = 0; i < indexes[0]; i++) {
for (i = 0; i < be32_to_cpu(indexes[0]); i++) {
if ((unsigned int) indexes[i + 1] == *my_index) {
if (drc_name)
*drc_name = name_tmp;
if (drc_type)
*drc_type = type_tmp;
if (drc_index)
*drc_index = *my_index;
*drc_index = be32_to_cpu(*my_index);
if (drc_power_domain)
*drc_power_domain = domains[i+1];
*drc_power_domain = be32_to_cpu(domains[i+1]);
return 0;
}
name_tmp += (strlen(name_tmp) + 1);
@ -321,16 +321,19 @@ int rpaphp_add_slot(struct device_node *dn)
/* register PCI devices */
name = (char *) &names[1];
type = (char *) &types[1];
for (i = 0; i < indexes[0]; i++) {
for (i = 0; i < be32_to_cpu(indexes[0]); i++) {
int index;
slot = alloc_slot_struct(dn, indexes[i + 1], name, power_domains[i + 1]);
index = be32_to_cpu(indexes[i + 1]);
slot = alloc_slot_struct(dn, index, name,
be32_to_cpu(power_domains[i + 1]));
if (!slot)
return -ENOMEM;
slot->type = simple_strtoul(type, NULL, 10);
dbg("Found drc-index:0x%x drc-name:%s drc-type:%s\n",
indexes[i + 1], name, type);
index, name, type);
retval = rpaphp_enable_slot(slot);
if (!retval)