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EDAC: Add owner check to the x86 platform drivers 

Change x86 EDAC platform drivers to verify the module owner at the
beginning of their module init functions. This allows them to fail their
init immediately when ghes_edac is enabled. Similar change can be made
to other edac drivers if necessary.

Also, remove ".c" from module names of pnp2_edac, sb_edac, and skx_edac.

Signed-off-by: Toshi Kani <toshi.kani@hpe.com>
Suggested-by: Borislav Petkov <bp@alien8.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Link: http://lkml.kernel.org/r/20170823225447.15608-6-toshi.kani@hpe.com
Signed-off-by: Borislav Petkov <bp@suse.de>
hifive-unleashed-5.1
Toshi Kani 2017-08-23 16:54:47 -06:00 committed by Borislav Petkov
parent 3877c7d1e2
commit 301375e764
4 changed files with 28 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/edac/amd64_edac.c
View File

@ -3434,9 +3434,14 @@ MODULE_DEVICE_TABLE(x86cpu, amd64_cpuids);
static int __init amd64_edac_init(void)
{
const char *owner;
int err = -ENODEV;
int i;
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
if (!x86_match_cpu(amd64_cpuids))
return -ENODEV;

9
drivers/edac/pnd2_edac.c
View File

@ -45,6 +45,8 @@
#include "edac_module.h"
#include "pnd2_edac.h"
#define EDAC_MOD_STR "pnd2_edac"
#define APL_NUM_CHANNELS 4
#define DNV_NUM_CHANNELS 2
#define DNV_MAX_DIMMS 2 /* Max DIMMs per channel */
@ -1355,7 +1357,7 @@ static int pnd2_register_mci(struct mem_ctl_info **ppmci)
pvt = mci->pvt_info;
memset(pvt, 0, sizeof(*pvt));
mci->mod_name = "pnd2_edac.c";
mci->mod_name = EDAC_MOD_STR;
mci->dev_name = ops->name;
mci->ctl_name = "Pondicherry2";
@ -1547,10 +1549,15 @@ MODULE_DEVICE_TABLE(x86cpu, pnd2_cpuids);
static int __init pnd2_init(void)
{
const struct x86_cpu_id *id;
const char *owner;
int rc;
edac_dbg(2, "\n");
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
id = x86_match_cpu(pnd2_cpuids);
if (!id)
return -ENODEV;

9
drivers/edac/sb_edac.c
View File

@ -36,7 +36,7 @@ static LIST_HEAD(sbridge_edac_list);
* Alter this version for the module when modifications are made
*/
#define SBRIDGE_REVISION " Ver: 1.1.2 "
#define EDAC_MOD_STR "sbridge_edac"
#define EDAC_MOD_STR "sb_edac"
/*
* Debug macros
@ -3155,7 +3155,7 @@ static int sbridge_register_mci(struct sbridge_dev *sbridge_dev, enum type type)
MEM_FLAG_DDR4 : MEM_FLAG_DDR3;
mci->edac_ctl_cap = EDAC_FLAG_NONE;
mci->edac_cap = EDAC_FLAG_NONE;
mci->mod_name = "sb_edac.c";
mci->mod_name = EDAC_MOD_STR;
mci->dev_name = pci_name(pdev);
mci->ctl_page_to_phys = NULL;
@ -3407,10 +3407,15 @@ static void sbridge_remove(void)
static int __init sbridge_init(void)
{
const struct x86_cpu_id *id;
const char *owner;
int rc;
edac_dbg(2, "\n");
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
id = x86_match_cpu(sbridge_cpuids);
if (!id)
return -ENODEV;

9
drivers/edac/skx_edac.c
View File

@ -31,6 +31,8 @@
#include "edac_module.h"
#define EDAC_MOD_STR "skx_edac"
/*
* Debug macros
*/
@ -473,7 +475,7 @@ static int skx_register_mci(struct skx_imc *imc)
mci->mtype_cap = MEM_FLAG_DDR4;
mci->edac_ctl_cap = EDAC_FLAG_NONE;
mci->edac_cap = EDAC_FLAG_NONE;
mci->mod_name = "skx_edac.c";
mci->mod_name = EDAC_MOD_STR;
mci->dev_name = pci_name(imc->chan[0].cdev);
mci->ctl_page_to_phys = NULL;
@ -1044,12 +1046,17 @@ static int __init skx_init(void)
{
const struct x86_cpu_id *id;
const struct munit *m;
const char *owner;
int rc = 0, i;
u8 mc = 0, src_id, node_id;
struct skx_dev *d;
edac_dbg(2, "\n");
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
id = x86_match_cpu(skx_cpuids);
if (!id)
return -ENODEV;