static struct persistent_ram_zone *
ramoops_get_next_prz(struct persistent_ram_zone *przs[], uint *c, uint max,
u64 *id,
enum pstore_type_id *typep, enum pstore_type_id type,
bool update)
{
struct persistent_ram_zone *prz;
int i = (*c)++;
if (i >= max)
return NULL;
prz = przs[i];
if (!prz)
return NULL;
/* Update old/shadowed buffer. */
if (update)
persistent_ram_save_old(prz);
if (!persistent_ram_old_size(prz))
return NULL;
*typep = type;
*id = i;
return prz;
}
static int __init __persistent_ram_init(struct persistent_ram_zone *prz,
void __iomem *mem, size_t buffer_size, bool ecc)
{
struct persistent_ram_buffer *buffer = mem;
int ret;
INIT_LIST_HEAD(&prz->node);
prz->buffer = buffer;
prz->buffer_size = buffer_size - sizeof(struct persistent_ram_buffer);
if (prz->buffer_size > buffer_size) {
pr_err("persistent_ram: buffer %p, invalid size %zu, datasize %zu\n",
buffer, buffer_size, prz->buffer_size);
return -EINVAL;
}
prz->ecc = ecc;
ret = persistent_ram_init_ecc(prz, buffer_size);
if (ret)
return ret;
if (buffer->sig == PERSISTENT_RAM_SIG) {
if (buffer->size > prz->buffer_size
|| buffer->start > buffer->size)
pr_info("persistent_ram: found existing invalid buffer, size %d, start %d\n",
buffer->size, buffer->start);
else {
pr_info("persistent_ram: found existing buffer, size %d, start %d\n",
buffer->size, buffer->start);
persistent_ram_save_old(prz);
}
} else {
pr_info("persistent_ram: no valid data in buffer (sig = 0x%08x)\n",
buffer->sig);
}
buffer->sig = PERSISTENT_RAM_SIG;
buffer->start = 0;
buffer->size = 0;
list_add_tail(&prz->node, &zone_list);
return 0;
}
