linux-kernel - [RESEND PATCH v3 9/9] edac: Don't load Arm specific edac drivers when ghes

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Date:   Mon, 22 Aug 2022 15:40:48 +0000
From:   Jia He <justin.he@....com>
To:     Len Brown <lenb@...nel.org>, James Morse <james.morse@....com>,
        Tony Luck <tony.luck@...el.com>,
        Borislav Petkov <bp@...en8.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Robert Richter <rric@...nel.org>,
        Robert Moore <robert.moore@...el.com>,
        Qiuxu Zhuo <qiuxu.zhuo@...el.com>,
        Yazen Ghannam <yazen.ghannam@....com>,
        Jonathan Corbet <corbet@....net>,
        Jan Luebbe <jlu@...gutronix.de>,
        Khuong Dinh <khuong@...amperecomputing.com>,
        Kani Toshi <toshi.kani@....com>
Cc:     Ard Biesheuvel <ardb@...nel.org>, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-edac@...r.kernel.org,
        devel@...ica.org, "Rafael J . Wysocki" <rafael@...nel.org>,
        Shuai Xue <xueshuai@...ux.alibaba.com>,
        Jarkko Sakkinen <jarkko@...nel.org>, linux-efi@...r.kernel.org,
        nd@....com, "Paul E. McKenney" <paulmck@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Neeraj Upadhyay <quic_neeraju@...cinc.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Muchun Song <songmuchun@...edance.com>,
        linux-doc@...r.kernel.org, Jia He <justin.he@....com>
Subject: [RESEND PATCH v3 9/9] edac: Don't load Arm specific edac drivers when ghes_edac is preferred

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.

Signed-off-by: Jia He <justin.he@....com>
---
 drivers/edac/armada_xp_edac.c  | 3 +++
 drivers/edac/layerscape_edac.c | 3 +++
 drivers/edac/thunderx_edac.c   | 3 +++
 drivers/edac/xgene_edac.c      | 3 +++
 4 files changed, 12 insertions(+)

diff --git a/drivers/edac/armada_xp_edac.c b/drivers/edac/armada_xp_edac.c
index 038abbb83f4b..486532b92ce0 100644
--- a/drivers/edac/armada_xp_edac.c
+++ b/drivers/edac/armada_xp_edac.c
@@ -599,6 +599,9 @@ static int __init armada_xp_edac_init(void)
 {
 	int res;
 
+	if (ghes_edac_preferred())
+		return -EBUSY;
+
 	/* only polling is supported */
 	edac_op_state = EDAC_OPSTATE_POLL;
 
diff --git a/drivers/edac/layerscape_edac.c b/drivers/edac/layerscape_edac.c
index 94cac7686a56..60ff4c6674cd 100644
--- a/drivers/edac/layerscape_edac.c
+++ b/drivers/edac/layerscape_edac.c
@@ -38,6 +38,9 @@ static int __init fsl_ddr_mc_init(void)
 {
 	int res;
 
+	if (ghes_edac_preferred())
+		return -EBUSY;
+
 	/* make sure error reporting method is sane */
 	switch (edac_op_state) {
 	case EDAC_OPSTATE_POLL:
diff --git a/drivers/edac/thunderx_edac.c b/drivers/edac/thunderx_edac.c
index f13674081cb6..2c4baa6817a9 100644
--- a/drivers/edac/thunderx_edac.c
+++ b/drivers/edac/thunderx_edac.c
@@ -2114,6 +2114,9 @@ static int __init thunderx_edac_init(void)
 {
 	int rc = 0;
 
+	if (ghes_edac_preferred())
+		return -EBUSY;
+
 	rc = pci_register_driver(&thunderx_lmc_driver);
 	if (rc)
 		return rc;
diff --git a/drivers/edac/xgene_edac.c b/drivers/edac/xgene_edac.c
index 54081403db4f..9aa68220b625 100644
--- a/drivers/edac/xgene_edac.c
+++ b/drivers/edac/xgene_edac.c
@@ -2004,6 +2004,9 @@ static int __init xgene_edac_init(void)
 {
 	int rc;
 
+	if (ghes_edac_preferred())
+		return -EBUSY;
+
 	/* Make sure error reporting method is sane */
 	switch (edac_op_state) {
 	case EDAC_OPSTATE_POLL:
-- 
2.25.1