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powerpc/nvram: Fix NVRAM partition list setup

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Simplify creation and use of the NVRAM partition list.

Signed-off-by: Jim Keniston <jkenisto@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Jim Keniston 2010-11-11 18:54:22 +00:00 committed by Benjamin Herrenschmidt
parent 9a866b8708
commit 690d1a9bd1
1 changed files with 8 additions and 18 deletions
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26
arch/powerpc/kernel/nvram_64.c
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@ -51,7 +51,7 @@ struct nvram_partition {
unsigned int index; unsigned int index;
}; };
static struct nvram_partition * nvram_part; static LIST_HEAD(nvram_partitions);
static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin) static loff_t dev_nvram_llseek(struct file *file, loff_t offset, int origin)
{ {
@ -196,13 +196,11 @@ static struct miscdevice nvram_dev = {
#ifdef DEBUG_NVRAM #ifdef DEBUG_NVRAM
static void __init nvram_print_partitions(char * label) static void __init nvram_print_partitions(char * label)
{ {
struct list_head * p;
struct nvram_partition * tmp_part; struct nvram_partition * tmp_part;
printk(KERN_WARNING "--------%s---------\n", label); printk(KERN_WARNING "--------%s---------\n", label);
printk(KERN_WARNING "indx\t\tsig\tchks\tlen\tname\n"); printk(KERN_WARNING "indx\t\tsig\tchks\tlen\tname\n");
list_for_each(p, &nvram_part->partition) { list_for_each_entry(tmp_part, &nvram_partitions, partition) {
tmp_part = list_entry(p, struct nvram_partition, partition);
printk(KERN_WARNING "%4d \t%02x\t%02x\t%d\t%s\n", printk(KERN_WARNING "%4d \t%02x\t%02x\t%d\t%s\n",
tmp_part->index, tmp_part->header.signature, tmp_part->index, tmp_part->header.signature,
tmp_part->header.checksum, tmp_part->header.length, tmp_part->header.checksum, tmp_part->header.length,
@ -250,7 +248,7 @@ int __init nvram_remove_partition(const char *name, int sig)
struct nvram_partition *part, *prev, *tmp; struct nvram_partition *part, *prev, *tmp;
int rc; int rc;
list_for_each_entry(part, &nvram_part->partition, partition) { list_for_each_entry(part, &nvram_partitions, partition) {
if (part->header.signature != sig) if (part->header.signature != sig)
continue; continue;
if (name && strncmp(name, part->header.name, 12)) if (name && strncmp(name, part->header.name, 12))
@ -269,7 +267,7 @@ int __init nvram_remove_partition(const char *name, int sig)
/* Merge contiguous ones */ /* Merge contiguous ones */
prev = NULL; prev = NULL;
list_for_each_entry_safe(part, tmp, &nvram_part->partition, partition) { list_for_each_entry_safe(part, tmp, &nvram_partitions, partition) {
if (part->header.signature != NVRAM_SIG_FREE) { if (part->header.signature != NVRAM_SIG_FREE) {
prev = NULL; prev = NULL;
continue; continue;
@ -333,7 +331,7 @@ loff_t __init nvram_create_partition(const char *name, int sig,
/* Find a free partition that will give us the maximum needed size /* Find a free partition that will give us the maximum needed size
If can't find one that will give us the minimum size needed */ If can't find one that will give us the minimum size needed */
list_for_each_entry(part, &nvram_part->partition, partition) { list_for_each_entry(part, &nvram_partitions, partition) {
if (part->header.signature != NVRAM_SIG_FREE) if (part->header.signature != NVRAM_SIG_FREE)
continue; continue;
@ -412,7 +410,7 @@ int nvram_get_partition_size(loff_t data_index)
{ {
struct nvram_partition *part; struct nvram_partition *part;
list_for_each_entry(part, &nvram_part->partition, partition) { list_for_each_entry(part, &nvram_partitions, partition) {
if (part->index + NVRAM_HEADER_LEN == data_index) if (part->index + NVRAM_HEADER_LEN == data_index)
return (part->header.length - 1) * NVRAM_BLOCK_LEN; return (part->header.length - 1) * NVRAM_BLOCK_LEN;
} }
@ -430,7 +428,7 @@ loff_t nvram_find_partition(const char *name, int sig, int *out_size)
{ {
struct nvram_partition *p; struct nvram_partition *p;
list_for_each_entry(p, &nvram_part->partition, partition) { list_for_each_entry(p, &nvram_partitions, partition) {
if (p->header.signature == sig && if (p->header.signature == sig &&
(!name || !strncmp(p->header.name, name, 12))) { (!name || !strncmp(p->header.name, name, 12))) {
if (out_size) if (out_size)
@ -452,14 +450,6 @@ int __init nvram_scan_partitions(void)
int total_size; int total_size;
int err; int err;
/* Initialize our anchor for the nvram partition list */
nvram_part = kmalloc(sizeof(struct nvram_partition), GFP_KERNEL);
if (!nvram_part) {
printk(KERN_ERR "nvram_init: Failed kmalloc\n");
return -ENOMEM;
}
INIT_LIST_HEAD(&nvram_part->partition);
if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0) if (ppc_md.nvram_size == NULL || ppc_md.nvram_size() <= 0)
return -ENODEV; return -ENODEV;
total_size = ppc_md.nvram_size(); total_size = ppc_md.nvram_size();
@ -507,7 +497,7 @@ int __init nvram_scan_partitions(void)
memcpy(&tmp_part->header, &phead, NVRAM_HEADER_LEN); memcpy(&tmp_part->header, &phead, NVRAM_HEADER_LEN);
tmp_part->index = cur_index; tmp_part->index = cur_index;
list_add_tail(&tmp_part->partition, &nvram_part->partition); list_add_tail(&tmp_part->partition, &nvram_partitions);
cur_index += phead.length * NVRAM_BLOCK_LEN; cur_index += phead.length * NVRAM_BLOCK_LEN;
} }