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Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/ghes_edac.c28
1 files changed, 23 insertions, 5 deletions
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index 8d904df75ad8..68b6ee18bea6 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -38,6 +38,10 @@ static struct ghes_edac_pvt *ghes_pvt;
*/
static DEFINE_SPINLOCK(ghes_lock);
+/* "ghes_edac.force_load=1" skips the platform check */
+static bool __read_mostly force_load;
+module_param(force_load, bool, 0);
+
/* Memory Device - Type 17 of SMBIOS spec */
struct memdev_dmi_entry {
u8 type;
@@ -415,6 +419,14 @@ void ghes_edac_report_mem_error(struct ghes *ghes, int sev,
spin_unlock_irqrestore(&ghes_lock, flags);
}
+/*
+ * Known systems that are safe to enable this module.
+ */
+static struct acpi_platform_list plat_list[] = {
+ {"HPE ", "Server ", 0, ACPI_SIG_FADT, all_versions},
+ { } /* End */
+};
+
int ghes_edac_register(struct ghes *ghes, struct device *dev)
{
bool fake = false;
@@ -422,6 +434,12 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
struct mem_ctl_info *mci;
struct edac_mc_layer layers[1];
struct ghes_edac_dimm_fill dimm_fill;
+ int idx;
+
+ /* Check if safe to enable on this system */
+ idx = acpi_match_platform_list(plat_list);
+ if (!force_load && idx < 0)
+ return 0;
/*
* We have only one logical memory controller to which all DIMMs belong.
@@ -460,17 +478,17 @@ int ghes_edac_register(struct ghes *ghes, struct device *dev)
mci->ctl_name = "ghes_edac";
mci->dev_name = "ghes";
- if (!fake) {
+ if (fake) {
+ pr_info("This system has a very crappy BIOS: It doesn't even list the DIMMS.\n");
+ pr_info("Its SMBIOS info is wrong. It is doubtful that the error report would\n");
+ pr_info("work on such system. Use this driver with caution\n");
+ } else if (idx < 0) {
pr_info("This EDAC driver relies on BIOS to enumerate memory and get error reports.\n");
pr_info("Unfortunately, not all BIOSes reflect the memory layout correctly.\n");
pr_info("So, the end result of using this driver varies from vendor to vendor.\n");
pr_info("If you find incorrect reports, please contact your hardware vendor\n");
pr_info("to correct its BIOS.\n");
pr_info("This system has %d DIMM sockets.\n", num_dimm);
- } else {
- pr_info("This system has a very crappy BIOS: It doesn't even list the DIMMS.\n");
- pr_info("Its SMBIOS info is wrong. It is doubtful that the error report would\n");
- pr_info("work on such system. Use this driver with caution\n");
}
if (!fake) {