From: Marti Raudsepp <marti@juffo.org>
Date: Wed, 20 Jan 2010 17:19:33 +0000 (+0200)
Subject: [CPUFREQ] powernow-k8: On load failure, remind the user to enable support in BIOS... 
X-Git-Tag: firefly_0821_release~9833^2~1313^2~13
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=298decfbc44e9a4cb7862ae1b7dfc4e1ba3551b9;p=firefly-linux-kernel-4.4.55.git

[CPUFREQ] powernow-k8: On load failure, remind the user to enable support in BIOS setup

On Wed, 2010-01-20 at 16:56 +0100, Thomas Renninger wrote:
> But most often this happens if people upgrade their CPU and do not
> update their BIOS.
> Or the vendor does not recognise the new CPU even if the BIOS got
> updated.

Maybe some of those people just didn't realize it was disabled in BIOS?
If you tell users that it's a firmware bug then they'll probably just
give up.

> The itself message might be an enhancment, IMO it's not worth a patch.

Why do you think so? I spent an hour on hunting down the BIOS upgrade,
only to find that it didn't improve anything. It was a day later that I
realized that it might be a BIOS option; and the option was literally
the _last_ option in the whole BIOS setup. :)

This message would have saved the day.

> But do not revert the FW_BUG part!

Sure, you have a point here.

How about this patch?
---

diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 3e90cce3dc8b..c48b44b3b43a 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -806,6 +806,8 @@ static int find_psb_table(struct powernow_k8_data *data)
 	 * www.amd.com
 	 */
 	printk(KERN_ERR FW_BUG PFX "No PSB or ACPI _PSS objects\n");
+	printk(KERN_ERR PFX "Make sure that your BIOS is up to date"
+		" and Cool'N'Quiet support is enabled in BIOS setup\n");
 	return -ENODEV;
 }