diff options
Diffstat (limited to 'fs/pstore/ram.c')
| -rw-r--r-- | fs/pstore/ram.c | 42 |
1 files changed, 31 insertions, 11 deletions
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c index 2bfa36e0ffe8..f883e7e74305 100644 --- a/fs/pstore/ram.c +++ b/fs/pstore/ram.c @@ -188,7 +188,7 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, struct pstore_info *psi) { struct ramoops_context *cxt = psi->data; - struct persistent_ram_zone *prz = cxt->przs[cxt->dump_write_cnt]; + struct persistent_ram_zone *prz; size_t hlen; if (type == PSTORE_TYPE_CONSOLE) { @@ -225,6 +225,11 @@ static int notrace ramoops_pstore_write_buf(enum pstore_type_id type, if (part != 1) return -ENOSPC; + if (!cxt->przs) + return -ENOSPC; + + prz = cxt->przs[cxt->dump_write_cnt]; + hlen = ramoops_write_kmsg_hdr(prz); if (size + hlen > prz->buffer_size) size = prz->buffer_size - hlen; @@ -286,8 +291,9 @@ static void ramoops_free_przs(struct ramoops_context *cxt) kfree(cxt->przs); } -static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, - phys_addr_t *paddr, size_t dump_mem_sz) +static int __devinit ramoops_init_przs(struct device *dev, + struct ramoops_context *cxt, + phys_addr_t *paddr, size_t dump_mem_sz) { int err = -ENOMEM; int i; @@ -295,6 +301,11 @@ static int ramoops_init_przs(struct device *dev, struct ramoops_context *cxt, if (!cxt->record_size) return 0; + if (*paddr + dump_mem_sz - cxt->phys_addr > cxt->size) { + dev_err(dev, "no room for dumps\n"); + return -ENOMEM; + } + cxt->max_dump_cnt = dump_mem_sz / cxt->record_size; if (!cxt->max_dump_cnt) return -ENOMEM; @@ -325,15 +336,20 @@ fail_prz: return err; } -static int ramoops_init_prz(struct device *dev, struct ramoops_context *cxt, - struct persistent_ram_zone **prz, - phys_addr_t *paddr, size_t sz, u32 sig) +static int __devinit ramoops_init_prz(struct device *dev, + struct ramoops_context *cxt, + struct persistent_ram_zone **prz, + phys_addr_t *paddr, size_t sz, u32 sig) { if (!sz) return 0; - if (*paddr + sz > *paddr + cxt->size) + if (*paddr + sz - cxt->phys_addr > cxt->size) { + dev_err(dev, "no room for mem region (0x%zx@0x%llx) in (0x%lx@0x%llx)\n", + sz, (unsigned long long)*paddr, + cxt->size, (unsigned long long)cxt->phys_addr); return -ENOMEM; + } *prz = persistent_ram_new(*paddr, sz, sig, cxt->ecc_size); if (IS_ERR(*prz)) { @@ -373,10 +389,14 @@ static int __devinit ramoops_probe(struct platform_device *pdev) goto fail_out; } - pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); - pdata->record_size = rounddown_pow_of_two(pdata->record_size); - pdata->console_size = rounddown_pow_of_two(pdata->console_size); - pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); + if (!is_power_of_2(pdata->mem_size)) + pdata->mem_size = rounddown_pow_of_two(pdata->mem_size); + if (!is_power_of_2(pdata->record_size)) + pdata->record_size = rounddown_pow_of_two(pdata->record_size); + if (!is_power_of_2(pdata->console_size)) + pdata->console_size = rounddown_pow_of_two(pdata->console_size); + if (!is_power_of_2(pdata->ftrace_size)) + pdata->ftrace_size = rounddown_pow_of_two(pdata->ftrace_size); cxt->dump_read_cnt = 0; cxt->size = pdata->mem_size; |