From: "Pavel Machek" <pavel@ucw.cz>
To: "Chen-Yu Tsai (Moxa)" <wens@csie.org>
Cc: nobuhiro1.iwamatsu@toshiba.co.jp, pavel@denx.de,
cip-dev@lists.cip-project.org, JohnsonCH.Chen@moxa.com
Subject: Re: [cip-dev] [PATCH 4.4.y-cip 18/23] PM / OPP: Initialize regulator pointer to an error value
Date: Tue, 14 Jul 2020 19:38:44 +0200 [thread overview]
Message-ID: <20200714173844.GC18210@amd> (raw)
In-Reply-To: <20200708154554.26450-19-wens@csie.org>
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On Wed 2020-07-08 23:45:49, Chen-Yu Tsai (Moxa) wrote:
> From: Viresh Kumar <viresh.kumar@linaro.org>
>
> commit 0c717d0f9cb46259dce5272705adce64a2d646d9 upstream.
>
> We are currently required to do two checks for regulator pointer:
> IS_ERR() and IS_NULL().
>
> And multiple instances are reported, about both of these not being used
> consistently and so resulting in crashes.
>
> Fix that by initializing regulator pointer with an error value and
> checking it only against an error.
>
> This makes code more consistent and more efficient.
Again, this should be close to (or merged with) patch 2/ of the series.
Best regards,
Pavel
--
DENX Software Engineering GmbH, Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
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next prev parent reply other threads:[~2020-07-14 17:38 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-08 15:45 [cip-dev] [PATCH 4.4.y-cip 00/23] PM / OPP v2 & cpufreq backports part 2 Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 01/23] PM / OPP: get/put regulators from OPP core Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 02/23] PM / OPP: Disable OPPs that aren't supported by the regulator Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 03/23] PM / OPP: Introduce dev_pm_opp_get_max_volt_latency() Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 04/23] PM / OPP: Introduce dev_pm_opp_get_max_transition_latency() Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 05/23] PM / OPP: Parse clock-latency and voltage-tolerance for v1 bindings Chen-Yu Tsai (Moxa)
2020-07-09 4:38 ` Nobuhiro Iwamatsu
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 06/23] PM / OPP: Manage device clk Chen-Yu Tsai (Moxa)
2020-07-14 17:44 ` Pavel Machek
2020-07-14 17:57 ` Pavel Machek
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 07/23] PM / OPP: Add dev_pm_opp_set_rate() Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 08/23] cpufreq: dt: Convert few pr_debug/err() calls to dev_dbg/err() Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 09/23] cpufreq: dt: Rename 'need_update' to 'opp_v1' Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 10/23] cpufreq: dt: OPP layers handles clock-latency for V1 bindings as well Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 11/23] cpufreq: dt: Pass regulator name to the OPP core Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 12/23] cpufreq: dt: Unsupported OPPs are already disabled Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 13/23] cpufreq: dt: Reuse dev_pm_opp_get_max_transition_latency() Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 14/23] cpufreq: dt: Use dev_pm_opp_set_rate() to switch frequency Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 15/23] cpufreq: dt: No need to fetch voltage-tolerance Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 16/23] cpufreq: dt: No need to allocate resources anymore Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 17/23] PM / OPP: Fix NULL pointer dereference crash when disabling OPPs Chen-Yu Tsai (Moxa)
2020-07-14 17:37 ` Pavel Machek
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 18/23] PM / OPP: Initialize regulator pointer to an error value Chen-Yu Tsai (Moxa)
2020-07-14 17:38 ` Pavel Machek [this message]
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 19/23] PM / OPP: Fix incorrect comments Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 20/23] PM / OPP: Rename structures for clarity Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 21/23] cpufreq: dt: Drop stale comment Chen-Yu Tsai (Moxa)
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 22/23] PM / OPP: Remove useless check Chen-Yu Tsai (Moxa)
2020-07-14 17:41 ` Pavel Machek
2020-07-08 15:45 ` [cip-dev] [PATCH 4.4.y-cip 23/23] PM / OPP: Update voltage in case freq == old_freq Chen-Yu Tsai (Moxa)
2020-07-09 4:48 ` [cip-dev] [PATCH 4.4.y-cip 00/23] PM / OPP v2 & cpufreq backports part 2 Nobuhiro Iwamatsu
2020-07-14 17:33 ` Pavel Machek
2020-08-31 3:41 ` Chen-Yu Tsai (Moxa)
2020-09-02 21:50 ` Pavel Machek
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