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EDAC: Add owner check to the x86 platform drivers

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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>
This commit is contained in:
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;