From: Vincent Minet <vincent@vincent-minet.net>
Date: Fri, 4 Jul 2014 23:51:33 +0000 (+0200)
Subject: intel_pstate: Set CPU number before accessing MSRs
X-Git-Tag: omap-for-v3.17/fixes-against-rc2~317^2^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=179e8471673ce0249cd4ecda796008f7757e5bad;p=pandora-kernel.git

intel_pstate: Set CPU number before accessing MSRs

Ensure that cpu->cpu is set before writing MSR_IA32_PERF_CTL during CPU
initialization. Otherwise only cpu0 has its P-state set and all other
cores are left with their values unchanged.

In most cases, this is not too serious because the P-states will be set
correctly when the timer function is run.  But when the default governor
is set to performance, the per-CPU current_pstate stays the same forever
and no attempts are made to write the MSRs again.

Signed-off-by: Vincent Minet <vincent@vincent-minet.net>
Cc: All applicable <stable@vger.kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

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