linux-kernel - [PATCH v1] cpufreq: mediatek-hw: Fix double devm

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Message-ID: <1635507743-17919-1-git-send-email-hector.yuan@mediatek.com>
Date:   Fri, 29 Oct 2021 19:42:22 +0800
From:   Hector Yuan <hector.yuan@...iatek.com>
To:     <linux-mediatek@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>, <linux-pm@...r.kernel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Viresh Kumar <viresh.kumar@...aro.org>
CC:     <linux-kernel@...r.kernel.org>, <wsd_upstream@...iatek.com>,
        <hector.yuan@...iatek.com>
Subject: [PATCH v1] cpufreq: mediatek-hw: Fix double devm_remap in hotplug case

When hotpluging policy cpu, cpu policy init will be called multiple times.
Unplug CPU7 -> CPU6 -> CPU5 -> CPU4, then plug CPU4 again.
In this case, devm_remap will double remap and resource allocate fail.
So replace devm_remap to ioremap and release related resources in cpu exit.


Hector.Yuan (1):
  cpufreq: mediatek-hw: Fix double devm_remap in hotplug case

 drivers/cpufreq/mediatek-cpufreq-hw.c |   33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)