linux-kernel - [tip: ras/core] EDAC/mce_amd: Always load on SMCA systems

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Date:   Thu, 16 Jan 2020 21:02:36 -0000
From:   "tip-bot2 for Yazen Ghannam" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Yazen Ghannam <yazen.ghannam@....com>,
        Borislav Petkov <bp@...e.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: ras/core] EDAC/mce_amd: Always load on SMCA systems

The following commit has been merged into the ras/core branch of tip:

Commit-ID:     9f6aef86315ac31481a288ba1b3f43b2aac93757
Gitweb:        https://git.kernel.org/tip/9f6aef86315ac31481a288ba1b3f43b2aac93757
Author:        Yazen Ghannam <yazen.ghannam@....com>
AuthorDate:    Fri, 10 Jan 2020 01:56:48 
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Thu, 16 Jan 2020 17:09:13 +01:00

EDAC/mce_amd: Always load on SMCA systems

MCA error decoding on SMCA systems is not dependent on family. Return
success early if the system supports the SMCA feature.

Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/20200110015651.14887-3-Yazen.Ghannam@amd.com
---
 drivers/edac/mce_amd.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index aa6ea53..524c63f 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -1189,6 +1189,11 @@ static int __init mce_amd_init(void)
 	if (!fam_ops)
 		return -ENOMEM;
 
+	if (boot_cpu_has(X86_FEATURE_SMCA)) {
+		xec_mask = 0x3f;
+		goto out;
+	}
+
 	switch (c->x86) {
 	case 0xf:
 		fam_ops->mc0_mce = k8_mc0_mce;
@@ -1237,11 +1242,8 @@ static int __init mce_amd_init(void)
 
 	case 0x17:
 	case 0x18:
-		xec_mask = 0x3f;
-		if (!boot_cpu_has(X86_FEATURE_SMCA)) {
-			printk(KERN_WARNING "Decoding supported only on Scalable MCA processors.\n");
-			goto err_out;
-		}
+		pr_warn("Decoding supported only on Scalable MCA processors.\n");
+		goto err_out;
 		break;
 
 	default:
@@ -1249,6 +1251,7 @@ static int __init mce_amd_init(void)
 		goto err_out;
 	}
 
+out:
 	pr_info("MCE: In-kernel MCE decoding enabled.\n");
 
 	mce_register_decode_chain(&amd_mce_dec_nb);