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authorToshi Kani <toshi.kani@hpe.com>2017-08-23 16:54:46 -0600
committerBorislav Petkov <bp@suse.de>2017-09-25 12:55:59 +0200
commit3877c7d1e24c05eeb1c57ade04d2527d511f25a1 (patch)
tree942677a67fb7443cb727356d4e107e7b7a8a8733 /drivers/edac
parent5deed6b6a479ad5851d7ead6412dc6faa84a694e (diff)
EDAC: Add helper which returns the loaded platform driver
Only a single EDAC platform driver can be loaded. When ghes_edac is enabled, an EDAC platform driver still attempts to register itself and fails in edac_mc_add_mc(). Add edac_get_owner() so that EDAC platform drivers can check the owner first. 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/20170823225447.15608-5-toshi.kani@hpe.com [ Massage commit message. ] Signed-off-by: Borislav Petkov <bp@suse.de>
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/edac_mc.c7
-rw-r--r--drivers/edac/edac_mc.h8
2 files changed, 14 insertions, 1 deletions
diff --git a/drivers/edac/edac_mc.c b/drivers/edac/edac_mc.c
index 480072139b7a..48193f5f3b56 100644
--- a/drivers/edac/edac_mc.c
+++ b/drivers/edac/edac_mc.c
@@ -53,7 +53,7 @@ static LIST_HEAD(mc_devices);
* Used to lock EDAC MC to just one module, avoiding two drivers e. g.
* apei/ghes and i7core_edac to be used at the same time.
*/
-static void const *edac_mc_owner;
+static const char *edac_mc_owner;
static struct bus_type mc_bus[EDAC_MAX_MCS];
@@ -701,6 +701,11 @@ unlock:
}
EXPORT_SYMBOL(edac_mc_find);
+const char *edac_get_owner(void)
+{
+ return edac_mc_owner;
+}
+EXPORT_SYMBOL_GPL(edac_get_owner);
/* FIXME - should a warning be printed if no error detection? correction? */
int edac_mc_add_mc_with_groups(struct mem_ctl_info *mci,
diff --git a/drivers/edac/edac_mc.h b/drivers/edac/edac_mc.h
index 5357800e418d..4165e15995ad 100644
--- a/drivers/edac/edac_mc.h
+++ b/drivers/edac/edac_mc.h
@@ -128,6 +128,14 @@ struct mem_ctl_info *edac_mc_alloc(unsigned mc_num,
unsigned sz_pvt);
/**
+ * edac_get_owner - Return the owner's mod_name of EDAC MC
+ *
+ * Returns:
+ * Pointer to mod_name string when EDAC MC is owned. NULL otherwise.
+ */
+extern const char *edac_get_owner(void);
+
+/*
* edac_mc_add_mc_with_groups() - Insert the @mci structure into the mci
* global list and create sysfs entries associated with @mci structure.
*

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