lkml.org 
[lkml]   [2017]   [Aug]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v3 5/5] edac drivers: add MC owner check in init
Date
Change generic x86 edac drivers, which probe CPU type with
x86_match_cpu(), 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 as 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: Borislav Petkov <bp@alien8.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Tony Luck <tony.luck@intel.com>
---
drivers/edac/amd64_edac.c | 5 +++++
drivers/edac/pnd2_edac.c | 9 ++++++++-
drivers/edac/sb_edac.c | 9 +++++++--
drivers/edac/skx_edac.c | 8 +++++++-
4 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 3aea556..529bcbf 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3435,9 +3435,14 @@ 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;

diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index 8e59949..6609041 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -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 */
@@ -1313,7 +1315,7 @@ 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";

@@ -1505,10 +1507,15 @@ 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;
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 80d860c..d411aa5c 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -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
@@ -3124,7 +3124,7 @@ 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->mod_ver = SBRIDGE_REVISION;
mci->dev_name = pci_name(pdev);
mci->ctl_page_to_phys = NULL;
@@ -3372,10 +3372,15 @@ 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;
diff --git a/drivers/edac/skx_edac.c b/drivers/edac/skx_edac.c
index 64bef6c9..17a2fbd 100644
--- a/drivers/edac/skx_edac.c
+++ b/drivers/edac/skx_edac.c
@@ -31,6 +31,7 @@

#include "edac_module.h"

+#define EDAC_MOD_STR "skx_edac"
#define SKX_REVISION " Ver: 1.0 "

/*
@@ -471,7 +472,7 @@ 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->mod_ver = SKX_REVISION;
mci->ctl_page_to_phys = NULL;
@@ -1042,12 +1043,17 @@ 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;
\
 
 \ /
  Last update: 2017-08-18 21:57    [W:0.131 / U:5.320 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site