firewire: qualify config ROM cache pointers as const pointers
Several config ROM related functions only peek at the ROM cache; mark
their arguments as const pointers. Ditto fw_device.config_rom and
fw_unit.directory, as the memory behind them is meant to be write-once.
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
diff --git a/drivers/firewire/core-device.c b/drivers/firewire/core-device.c
index 5d5c6a6..eecd52d 100644
--- a/drivers/firewire/core-device.c
+++ b/drivers/firewire/core-device.c
@@ -43,7 +43,7 @@
#include "core.h"
-void fw_csr_iterator_init(struct fw_csr_iterator *ci, u32 * p)
+void fw_csr_iterator_init(struct fw_csr_iterator *ci, const u32 *p)
{
ci->p = p + 1;
ci->end = ci->p + (p[0] >> 16);
@@ -59,7 +59,7 @@
}
EXPORT_SYMBOL(fw_csr_iterator_next);
-static u32 *search_leaf(u32 *directory, int search_key)
+static const u32 *search_leaf(const u32 *directory, int search_key)
{
struct fw_csr_iterator ci;
int last_key = 0, key, value;
@@ -76,7 +76,7 @@
return NULL;
}
-static int textual_leaf_to_string(u32 *block, char *buf, size_t size)
+static int textual_leaf_to_string(const u32 *block, char *buf, size_t size)
{
unsigned int quadlets, i;
char c;
@@ -116,9 +116,9 @@
* the immediate entry with @key. The string is zero-terminated.
* Returns strlen(buf) or a negative error code.
*/
-int fw_csr_string(u32 *directory, int key, char *buf, size_t size)
+int fw_csr_string(const u32 *directory, int key, char *buf, size_t size)
{
- u32 *leaf = search_leaf(directory, key);
+ const u32 *leaf = search_leaf(directory, key);
if (!leaf)
return -ENOENT;
@@ -128,7 +128,7 @@
static bool is_fw_unit(struct device *dev);
-static int match_unit_directory(u32 *directory, u32 match_flags,
+static int match_unit_directory(const u32 *directory, u32 match_flags,
const struct ieee1394_device_id *id)
{
struct fw_csr_iterator ci;
@@ -262,7 +262,7 @@
struct config_rom_attribute *attr =
container_of(dattr, struct config_rom_attribute, attr);
struct fw_csr_iterator ci;
- u32 *dir;
+ const u32 *dir;
int key, value, ret = -ENOENT;
down_read(&fw_device_rwsem);
@@ -293,7 +293,7 @@
{
struct config_rom_attribute *attr =
container_of(dattr, struct config_rom_attribute, attr);
- u32 *dir;
+ const u32 *dir;
size_t bufsize;
char dummy_buf[2];
int ret;
@@ -421,7 +421,7 @@
return ret;
}
-static int units_sprintf(char *buf, u32 *directory)
+static int units_sprintf(char *buf, const u32 *directory)
{
struct fw_csr_iterator ci;
int key, value;
@@ -503,7 +503,8 @@
*/
static int read_bus_info_block(struct fw_device *device, int generation)
{
- u32 *rom, *stack, *old_rom, *new_rom;
+ const u32 *old_rom, *new_rom;
+ u32 *rom, *stack;
u32 sp, key;
int i, end, length, ret = -1;