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pstore/ram: Add ECC support

Browse source 
This is now straightforward: just introduce a module parameter and pass
the needed value to persistent_ram_new().

Signed-off-by: Anton Vorontsov <[email protected]>
Acked-by: Marco Stornelli <[email protected]>
Acked-by: Kees Cook <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Anton Vorontsov 2012-05-17 00:15:34 -07:00 • committed by Greg Kroah-Hartman
commit 39eb7e9791
3 changed files with 19 additions and 3 deletions
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15
fs/pstore/ram.c
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@ -56,12 +56,18 @@ module_param(dump_oops, int, 0600);
MODULE_PARM_DESC(dump_oops,
"set to 1 to dump oopses, 0 to only dump panics (default 1)");
static int ramoops_ecc;
module_param_named(ecc, ramoops_ecc, int, 0600);
MODULE_PARM_DESC(ramoops_ecc,
"set to 1 to enable ECC support");
struct ramoops_context {
struct persistent_ram_zone **przs;
phys_addr_t phys_addr;
unsigned long size;
size_t record_size;
int dump_oops;
bool ecc;
unsigned int count;
unsigned int max_count;
unsigned int read_count;
@ -236,6 +242,7 @@ static int __init ramoops_probe(struct platform_device *pdev)
cxt->phys_addr = pdata->mem_address;
cxt->record_size = pdata->record_size;
cxt->dump_oops = pdata->dump_oops;
cxt->ecc = pdata->ecc;
cxt->przs = kzalloc(sizeof(*cxt->przs) * cxt->max_count, GFP_KERNEL);
if (!cxt->przs) {
@ -248,7 +255,7 @@ static int __init ramoops_probe(struct platform_device *pdev)
size_t sz = cxt->record_size;
phys_addr_t start = cxt->phys_addr + sz * i;
cxt->przs[i] = persistent_ram_new(start, sz, 0);
cxt->przs[i] = persistent_ram_new(start, sz, cxt->ecc);
if (IS_ERR(cxt->przs[i])) {
err = PTR_ERR(cxt->przs[i]);
dev_err(dev, "failed to request mem region (0x%zx@0x%llx): %d\n",
@ -281,9 +288,10 @@ static int __init ramoops_probe(struct platform_device *pdev)
record_size = pdata->record_size;
dump_oops = pdata->dump_oops;
pr_info("attached 0x%lx@0x%llx (%ux0x%zx)\n",
pr_info("attached 0x%lx@0x%llx (%ux0x%zx), ecc: %s\n",
cxt->size, (unsigned long long)cxt->phys_addr,
cxt->max_count, cxt->record_size);
cxt->max_count, cxt->record_size,
ramoops_ecc ? "on" : "off");
return 0;
@ -347,6 +355,7 @@ static int __init ramoops_init(void)
dummy_data->mem_address = mem_address;
dummy_data->record_size = record_size;
dummy_data->dump_oops = dump_oops;
dummy_data->ecc = ramoops_ecc;
dummy = platform_create_bundle(&ramoops_driver, ramoops_probe,
NULL, 0, dummy_data,
sizeof(struct ramoops_platform_data));