[RESEND PATCH v3 5/9] EDAC: Don't load chipset-specific edac drivers when ghes_edac is preferred

Jia He
2022-08-22T15:42:54Z

edac_mc_add_mc* is too late in the init path and that check should happen
as the very first thing in the driver init function.

Suggested-by: Toshi Kani <toshi.kani@hpe.com>
Signed-off-by: Jia He <justin.he@arm.com>
---
drivers/acpi/apei/ghes.c | 13 +++++++++++--
drivers/edac/amd64_edac.c | 3 +++
drivers/edac/edac_module.h | 1 +
drivers/edac/i10nm_base.c | 3 +++
drivers/edac/igen6_edac.c | 3 +++
drivers/edac/pnd2_edac.c | 3 +++
drivers/edac/sb_edac.c | 3 +++
drivers/edac/skx_base.c | 3 +++
include/acpi/ghes.h | 2 ++
9 files changed, 32 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index e17e0ee8f842..327386f3cf33 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -1537,16 +1537,25 @@ static struct acpi_platform_list plat_list[] = {
{ } /* End */
};

-struct list_head *ghes_get_devices(void)
+bool ghes_edac_preferred(void)
{
int idx = -1;

if (IS_ENABLED(CONFIG_X86)) {
idx = acpi_match_platform_list(plat_list);
if (idx < 0 && !ghes_edac_force)
- return NULL;
+ return false;
}

+ return true;
+}
+EXPORT_SYMBOL_GPL(ghes_edac_preferred);
+
+struct list_head *ghes_get_devices(void)
+{
+ if (!ghes_edac_preferred())
+ return NULL;
+
return &ghes_devs;
}
EXPORT_SYMBOL_GPL(ghes_get_devices);
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 2f854feeeb23..5314a934c2bf 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -4329,6 +4329,9 @@ static int __init amd64_edac_init(void)
int err = -ENODEV;
int i;

+ if (ghes_edac_preferred())
+ return -EBUSY;
+
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
diff --git a/drivers/edac/edac_module.h b/drivers/edac/edac_module.h
index 96f6de0c8ff6..3826f82de487 100644
--- a/drivers/edac/edac_module.h
+++ b/drivers/edac/edac_module.h
@@ -11,6 +11,7 @@
#ifndef __EDAC_MODULE_H__
#define __EDAC_MODULE_H__

+#include <acpi/ghes.h>
#include "edac_mc.h"
#include "edac_pci.h"
#include "edac_device.h"
diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c
index 6cf50ee0b77c..691df9b51622 100644
--- a/drivers/edac/i10nm_base.c
+++ b/drivers/edac/i10nm_base.c
@@ -548,6 +548,9 @@ static int __init i10nm_init(void)

edac_dbg(2, "\n");

+ if (ghes_edac_preferred())
+ return -EBUSY;
+
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
diff --git a/drivers/edac/igen6_edac.c b/drivers/edac/igen6_edac.c
index a07bbfd075d0..4ac6d0c533ec 100644
--- a/drivers/edac/igen6_edac.c
+++ b/drivers/edac/igen6_edac.c
@@ -1271,6 +1271,9 @@ static int __init igen6_init(void)

edac_dbg(2, "\n");

+ if (ghes_edac_preferred())
+ return -EBUSY;
+
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -ENODEV;
diff --git a/drivers/edac/pnd2_edac.c b/drivers/edac/pnd2_edac.c
index a20b299f1202..4ddc43e6c420 100644
--- a/drivers/edac/pnd2_edac.c
+++ b/drivers/edac/pnd2_edac.c
@@ -1528,6 +1528,9 @@ static int __init pnd2_init(void)

edac_dbg(2, "\n");

+ if (ghes_edac_preferred())
+ return -EBUSY;
+
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 9678ab97c7ac..3ff604a5e95a 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -3506,6 +3506,9 @@ static int __init sbridge_init(void)

edac_dbg(2, "\n");

+ if (ghes_edac_preferred())
+ return -EBUSY;
+
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
diff --git a/drivers/edac/skx_base.c b/drivers/edac/skx_base.c
index 1abc020d49ab..286370728552 100644
--- a/drivers/edac/skx_base.c
+++ b/drivers/edac/skx_base.c
@@ -653,6 +653,9 @@ static int __init skx_init(void)

edac_dbg(2, "\n");

+ if (ghes_edac_preferred())
+ return -EBUSY;
+
owner = edac_get_owner();
if (owner && strncmp(owner, EDAC_MOD_STR, sizeof(EDAC_MOD_STR)))
return -EBUSY;
diff --git a/include/acpi/ghes.h b/include/acpi/ghes.h
index e29327ee0b83..1c47018a1e43 100644
--- a/include/acpi/ghes.h
+++ b/include/acpi/ghes.h
@@ -73,9 +73,11 @@ int ghes_register_vendor_record_notifier(struct notifier_block *nb);
void ghes_unregister_vendor_record_notifier(struct notifier_block *nb);

struct list_head *ghes_get_devices(void);
+bool ghes_edac_preferred(void);
extern bool ghes_edac_force;
#else
static inline struct list_head *ghes_get_devices(void) { return NULL; }
+static bool ghes_edac_preferred(void) { return false; }
static bool ghes_edac_force;
#endif

--
2.25.1