linux-kernel - [PATCH 2/3] cpumask: fix powernow-k8: partial revert of 2fdf66b491ac706657946442789ec644cc317e1a

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Message-Id: <200902071809.39175.rusty@rustcorp.com.au>
Date:	Sat, 7 Feb 2009 18:09:38 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Ingo Molnar <mingo@...hat.com>
Cc:	Yinghai Lu <yinghai@...nel.org>
Subject: [PATCH 2/3] cpumask: fix powernow-k8: partial revert of 2fdf66b491ac706657946442789ec644cc317e1a

Impact: fix powernow-k8 when acpi=off (or other error).

There was a spurious change introduced into powernow-k8 in this patch:
the cause if that we try to "restore" the cpus_allowed we never saved.

See lkml "[PATCH] x86/powernow: fix cpus_allowed brokage when
acpi=off" from Yinghai for the bug report.

Cc: Mike Travis <travis@....com>
Cc: Yinghai Lu <yinghai@...nel.org>
Signed-off-by: Rusty Russell <rusty@...tcorp.com.au>
---
 arch/x86/kernel/cpu/cpufreq/powernow-k8.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1142,8 +1142,7 @@ static int __cpuinit powernowk8_cpu_init
 	data->cpu = pol->cpu;
 	data->currpstate = HW_PSTATE_INVALID;
 
-	rc = powernow_k8_cpu_init_acpi(data);
-	if (rc) {
+	if (powernow_k8_cpu_init_acpi(data)) {
 		/*
 		 * Use the PSB BIOS structure. This is only availabe on
 		 * an UP version, and is deprecated by AMD.
@@ -1161,17 +1160,20 @@ static int __cpuinit powernowk8_cpu_init
 			       "ACPI maintainers and complain to your BIOS "
 			       "vendor.\n");
 #endif
-			goto err_out;
+			kfree(data);
+			return -ENODEV;
 		}
 		if (pol->cpu != 0) {
 			printk(KERN_ERR FW_BUG PFX "No ACPI _PSS objects for "
 			       "CPU other than CPU0. Complain to your BIOS "
 			       "vendor.\n");
-			goto err_out;
+			kfree(data);
+			return -ENODEV;
 		}
 		rc = find_psb_table(data);
 		if (rc) {
-			goto err_out;
+			kfree(data);
+			return -ENODEV;
 		}
 	}
 

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