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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-30 10:47:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-30 10:47:23 -0700
commit42df60fcdfb8c02fa1800899cb33858e46efd587 (patch)
treedc67b5f721356a9852ed297172701111b053359b /drivers/edac
parentc4011283a7d5d64a50991dd3baa9acdf3d49092c (diff)
parentb972fdba8665d75109ade0357739f46af6415d2a (diff)
Merge tag 'edac_urgent_for_v5.9_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras
Pull EDAC fix from Borislav Petkov: "A fix to properly clear ghes_edac driver state on driver remove so that a subsequent load can probe the system properly (Shiju Jose)" * tag 'edac_urgent_for_v5.9_rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: EDAC/ghes: Fix NULL pointer dereference in ghes_edac_register()
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/ghes_edac.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/edac/ghes_edac.c b/drivers/edac/ghes_edac.c
index da60c29468a7..54ebc8afc6b1 100644
--- a/drivers/edac/ghes_edac.c
+++ b/drivers/edac/ghes_edac.c
@@ -55,6 +55,8 @@ static DEFINE_SPINLOCK(ghes_lock);
static bool __read_mostly force_load;
module_param(force_load, bool, 0);
+static bool system_scanned;
+
/* Memory Device - Type 17 of SMBIOS spec */
struct memdev_dmi_entry {
u8 type;
@@ -225,14 +227,12 @@ static void enumerate_dimms(const struct dmi_header *dh, void *arg)
static void ghes_scan_system(void)
{
- static bool scanned;
-
- if (scanned)
+ if (system_scanned)
return;
dmi_walk(enumerate_dimms, &ghes_hw);
- scanned = true;
+ system_scanned = true;
}
void ghes_edac_report_mem_error(int sev, struct cper_sec_mem_err *mem_err)
@@ -631,6 +631,8 @@ void ghes_edac_unregister(struct ghes *ghes)
mutex_lock(&ghes_reg_mutex);
+ system_scanned = false;
+
if (!refcount_dec_and_test(&ghes_refcount))
goto unlock;