bcma: fix error code handling on 64 Bit systems
On most 64 Bit systems unsigned long is 64 bit long and then -MAX_ERRNO
is out of the range of a u32 used to store the error code in.
This patch casts the -MAX_ERRNO to a u32 instead.
This fixes a regression introduced in:
commit fd4edf197544bae1c77d84bad354aa7ce1d08ce1
Author: Hauke Mehrtens <hauke@hauke-m.de>
Date: Mon Jul 15 13:15:08 2013 +0200
bcma: fix handling of big addrl
Reported-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Tested-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/bcma/scan.c b/drivers/bcma/scan.c
index cd6b20f..3776840 100644
--- a/drivers/bcma/scan.c
+++ b/drivers/bcma/scan.c
@@ -269,6 +269,8 @@
return NULL;
}
+#define IS_ERR_VALUE_U32(x) ((x) >= (u32)-MAX_ERRNO)
+
static int bcma_get_next_core(struct bcma_bus *bus, u32 __iomem **eromptr,
struct bcma_device_id *match, int core_num,
struct bcma_device *core)
@@ -351,11 +353,11 @@
* the main register space for the core
*/
tmp = bcma_erom_get_addr_desc(bus, eromptr, SCAN_ADDR_TYPE_SLAVE, 0);
- if (tmp == 0 || IS_ERR_VALUE(tmp)) {
+ if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
/* Try again to see if it is a bridge */
tmp = bcma_erom_get_addr_desc(bus, eromptr,
SCAN_ADDR_TYPE_BRIDGE, 0);
- if (tmp == 0 || IS_ERR_VALUE(tmp)) {
+ if (tmp == 0 || IS_ERR_VALUE_U32(tmp)) {
return -EILSEQ;
} else {
bcma_info(bus, "Bridge found\n");
@@ -369,7 +371,7 @@
for (j = 0; ; j++) {
tmp = bcma_erom_get_addr_desc(bus, eromptr,
SCAN_ADDR_TYPE_SLAVE, i);
- if (IS_ERR_VALUE(tmp)) {
+ if (IS_ERR_VALUE_U32(tmp)) {
/* no more entries for port _i_ */
/* pr_debug("erom: slave port %d "
* "has %d descriptors\n", i, j); */
@@ -386,7 +388,7 @@
for (j = 0; ; j++) {
tmp = bcma_erom_get_addr_desc(bus, eromptr,
SCAN_ADDR_TYPE_MWRAP, i);
- if (IS_ERR_VALUE(tmp)) {
+ if (IS_ERR_VALUE_U32(tmp)) {
/* no more entries for port _i_ */
/* pr_debug("erom: master wrapper %d "
* "has %d descriptors\n", i, j); */
@@ -404,7 +406,7 @@
for (j = 0; ; j++) {
tmp = bcma_erom_get_addr_desc(bus, eromptr,
SCAN_ADDR_TYPE_SWRAP, i + hack);
- if (IS_ERR_VALUE(tmp)) {
+ if (IS_ERR_VALUE_U32(tmp)) {
/* no more entries for port _i_ */
/* pr_debug("erom: master wrapper %d "
* has %d descriptors\n", i, j); */