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powerpc: Make OF PCI device tree accesses endian safe

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Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2013-08-07 02:01:41 +10:00 committed by Benjamin Herrenschmidt
parent 7560d32757
commit a795dc548a
2 changed files with 16 additions and 13 deletions
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6
arch/powerpc/kernel/pci-common.c
View File

@ -667,7 +667,7 @@ void pci_resource_to_user(const struct pci_dev *dev, int bar,
void pci_process_bridge_OF_ranges(struct pci_controller *hose,
struct device_node *dev, int primary)
{
const u32 *ranges;
const __be32 *ranges;
int rlen;
int pna = of_n_addr_cells(dev);
int np = pna + 5;
@ -687,7 +687,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose,
/* Parse it */
while ((rlen -= np * 4) >= 0) {
/* Read next ranges element */
pci_space = ranges[0];
pci_space = of_read_number(ranges, 1);
pci_addr = of_read_number(ranges + 1, 2);
cpu_addr = of_translate_address(dev, ranges + 3);
size = of_read_number(ranges + pna + 3, 2);
@ -704,7 +704,7 @@ void pci_process_bridge_OF_ranges(struct pci_controller *hose,
/* Now consume following elements while they are contiguous */
for (; rlen >= np * sizeof(u32);
ranges += np, rlen -= np * 4) {
if (ranges[0] != pci_space)
if (of_read_number(ranges, 1) != pci_space)
break;
pci_next = of_read_number(ranges + 1, 2);
cpu_next = of_translate_address(dev, ranges + 3);

23
arch/powerpc/kernel/pci_of_scan.c
View File

@ -24,12 +24,12 @@
*/
static u32 get_int_prop(struct device_node *np, const char *name, u32 def)
{
const u32 *prop;
const __be32 *prop;
int len;
prop = of_get_property(np, name, &len);
if (prop && len >= 4)
return *prop;
return of_read_number(prop, 1);
return def;
}
@ -77,7 +77,7 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
unsigned int flags;
struct pci_bus_region region;
struct resource *res;
const u32 *addrs;
const __be32 *addrs;
u32 i;
int proplen;
@ -86,14 +86,14 @@ static void of_pci_parse_addrs(struct device_node *node, struct pci_dev *dev)
return;
pr_debug(" parse addresses (%d bytes) @ %p\n", proplen, addrs);
for (; proplen >= 20; proplen -= 20, addrs += 5) {
flags = pci_parse_of_flags(addrs[0], 0);
flags = pci_parse_of_flags(of_read_number(addrs, 1), 0);
if (!flags)
continue;
base = of_read_number(&addrs[1], 2);
size = of_read_number(&addrs[3], 2);
if (!size)
continue;
i = addrs[0] & 0xff;
i = of_read_number(addrs, 1) & 0xff;
pr_debug(" base: %llx, size: %llx, i: %x\n",
(unsigned long long)base,
(unsigned long long)size, i);
@ -207,7 +207,7 @@ void of_scan_pci_bridge(struct pci_dev *dev)
{
struct device_node *node = dev->dev.of_node;
struct pci_bus *bus;
const u32 *busrange, *ranges;
const __be32 *busrange, *ranges;
int len, i, mode;
struct pci_bus_region region;
struct resource *res;
@ -230,9 +230,11 @@ void of_scan_pci_bridge(struct pci_dev *dev)
return;
}
bus = pci_find_bus(pci_domain_nr(dev->bus), busrange[0]);
bus = pci_find_bus(pci_domain_nr(dev->bus),
of_read_number(busrange, 1));
if (!bus) {
bus = pci_add_new_bus(dev->bus, dev, busrange[0]);
bus = pci_add_new_bus(dev->bus, dev,
of_read_number(busrange, 1));
if (!bus) {
printk(KERN_ERR "Failed to create pci bus for %s\n",
node->full_name);
@ -241,7 +243,8 @@ void of_scan_pci_bridge(struct pci_dev *dev)
}
bus->primary = dev->bus->number;
pci_bus_insert_busn_res(bus, busrange[0], busrange[1]);
pci_bus_insert_busn_res(bus, of_read_number(busrange, 1),
of_read_number(busrange+1, 1));
bus->bridge_ctl = 0;
/* parse ranges property */
@ -254,7 +257,7 @@ void of_scan_pci_bridge(struct pci_dev *dev)
}
i = 1;
for (; len >= 32; len -= 32, ranges += 8) {
flags = pci_parse_of_flags(ranges[0], 1);
flags = pci_parse_of_flags(of_read_number(ranges, 1), 1);
size = of_read_number(&ranges[6], 2);
if (flags == 0 || size == 0)
continue;