From: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
To: rjw@rjwysocki.net, mroos@linux.ee, viresh.kumar@linaro.org
Cc: cpufreq@vger.kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, srivatsa.bhat@linux.vnet.ibm.com
Subject: [PATCH 0/3] Cpufreq frequency serialization fixes
Date: Fri, 25 Apr 2014 13:47:58 +0530 [thread overview]
Message-ID: <20140425081728.10258.63980.stgit@srivatsabhat.in.ibm.com> (raw)
Hi,
Meelis Roos reported hangs during boot in the longhaul cpufreq driver, after
commit 12478cf0c55 (cpufreq: Make sure frequency transitions are serialized).
The root-cause of this issue is the extra invocation of the
cpufreq_freq_transition_begin() and cpufreq_freq_transition_end() APIs in the
longhaul driver. I found similar issues in the powernow-k6 and powernow-k7
drivers as well. This patchset fixes the issue in all the 3 drivers.
Srivatsa S. Bhat (3):
cpufreq, powernow-k7: Fix double invocation of cpufreq_freq_transition_begin/end
cpufreq, powernow-k6: Fix double invocation of cpufreq_freq_transition_begin/end
cpufreq, longhaul: Fix double invocation of cpufreq_freq_transition_begin/end
drivers/cpufreq/longhaul.c | 12 ++++++++----
drivers/cpufreq/powernow-k6.c | 20 +++++++++++---------
drivers/cpufreq/powernow-k7.c | 4 ----
3 files changed, 19 insertions(+), 17 deletions(-)
Thanks,
Srivatsa S. Bhat
IBM Linux Technology Center
next reply other threads:[~2014-04-25 8:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-25 8:17 Srivatsa S. Bhat [this message]
2014-04-25 8:18 ` [PATCH 1/3] cpufreq, longhaul: Fix double invocation of cpufreq_freq_transition_begin/end Srivatsa S. Bhat
2014-04-25 8:37 ` Viresh Kumar
2014-04-25 8:39 ` Srivatsa S. Bhat
2014-04-25 8:18 ` [PATCH 2/3] cpufreq, powernow-k6: " Srivatsa S. Bhat
2014-04-25 8:28 ` Viresh Kumar
2014-04-25 8:42 ` Srivatsa S. Bhat
2014-04-25 8:18 ` [PATCH 3/3] cpufreq, powernow-k7: " Srivatsa S. Bhat
2014-04-25 8:24 ` Viresh Kumar
2014-04-25 17:29 ` [PATCH 0/3] Cpufreq frequency serialization fixes Meelis Roos
2014-04-28 18:47 ` Srivatsa S. Bhat
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