linux-kernel - [PATCH 1/5] x86, AMD: fix error path in apply_microcode

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Date:	Tue, 23 Jul 2013 22:58:23 +0200
From:	Torsten Kaiser <just.for.lkml@...glemail.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>, Borislav Petkov <bp@...en8.de>,
	Jacob Shin <jacob.shin@....com>,
	Johannes Hirte <johannes.hirte@....tu-ilmenau.de>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/5] x86, AMD: fix error path in apply_microcode_amd()

Return -1 (like Intels apply_microcode) when the loading fails, also
do not set the active microcode level on failure.

Signed-off-by: Torsten Kaiser <just.for.lkml@...glemail.com>

--- a/arch/x86/kernel/microcode_amd.c	2013-07-23 19:42:16.089517717 +0200
+++ b/arch/x86/kernel/microcode_amd.c	2013-07-23 19:43:30.359517091 +0200
@@ -220,12 +220,13 @@ int apply_microcode_amd(int cpu)
 		return 0;
 	}
 
-	if (__apply_microcode_amd(mc_amd))
+	if (__apply_microcode_amd(mc_amd)) {
 		pr_err("CPU%d: update failed for patch_level=0x%08x\n",
 			cpu, mc_amd->hdr.patch_id);
-	else
-		pr_info("CPU%d: new patch_level=0x%08x\n", cpu,
-			mc_amd->hdr.patch_id);
+		return -1;
+	}
+	pr_info("CPU%d: new patch_level=0x%08x\n", cpu,
+		mc_amd->hdr.patch_id);
 
 	uci->cpu_sig.rev = mc_amd->hdr.patch_id;
 	c->microcode = mc_amd->hdr.patch_id;
--
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