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From: Sudeep Holla <sudeep.holla@arm.com>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Saravana Kannan <saravanak@google.com>,
	linux-pm@vger.kernel.org,
	"Rafael J . Wysocki" <rjw@rjwysocki.net>,
	Daniel Lezcano <daniel.lezcano@linaro.org>,
	Lina Iyer <ilina@codeaurora.org>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Stephen Boyd <sboyd@kernel.org>,
	Bjorn Andersson <bjorn.andersson@linaro.org>,
	Benjamin Gaignard <benjamin.gaignard@st.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 2/5] cpuidle: psci: Fix error path via converting to a platform driver
Date: Fri, 26 Jun 2020 15:42:18 +0100	[thread overview]
Message-ID: <20200626144218.GD27140@bogus> (raw)
In-Reply-To: <20200615152054.6819-3-ulf.hansson@linaro.org>

On Mon, Jun 15, 2020 at 05:20:51PM +0200, Ulf Hansson wrote:
> The current error paths for the cpuidle-psci driver, may leak memory or
> possibly leave CPU devices attached to their PM domains. These are quite
> harmless issues, but still deserves to be taken care of.
>
> Although, rather than fixing them by keeping track of allocations that
> needs to be freed, which tends to become a bit messy, let's convert into a
> platform driver. In this way, it gets easier to fix the memory leaks as we
> can rely on the devm_* functions.
>
> Moreover, converting to a platform driver also enables support for deferred
> probe, which subsequent changes takes benefit from.
>

Though I don't have strong opinion, I don't like platform device for cpuidle.
But that's not main issue. I am more worried about the need for whole
deferred probe for cpuidle. Is this due to OSI and Qcom dependencies ?
Ideally, the firmware is already to accept suspend calls soon after they
are powered on in psci f/w.

--
Regards,
Sudeep

  reply	other threads:[~2020-06-26 14:42 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-15 15:20 [PATCH 0/5] cpuidle: psci: Various improvements for PSCI PM domains Ulf Hansson
2020-06-15 15:20 ` [PATCH 1/5] cpuidle: psci: Fail cpuidle registration if set OSI mode failed Ulf Hansson
2020-06-18 18:01   ` Lina Iyer
2020-06-26 14:33   ` Sudeep Holla
2020-06-26 14:47     ` Sudeep Holla
2020-06-15 15:20 ` [PATCH 2/5] cpuidle: psci: Fix error path via converting to a platform driver Ulf Hansson
2020-06-26 14:42   ` Sudeep Holla [this message]
2020-06-26 23:06     ` Ulf Hansson
2020-06-15 15:20 ` [PATCH 3/5] cpuidle: psci: Split into two separate build objects Ulf Hansson
2020-06-18 18:02   ` Lina Iyer
2020-06-26 14:44   ` Sudeep Holla
2020-06-15 15:20 ` [PATCH 4/5] cpuidle: psci: Convert PM domain to platform driver Ulf Hansson
2020-06-23 17:21   ` Lina Iyer
2020-06-15 15:20 ` [PATCH 5/5] cpuidle: psci: Prevent domain idlestates until consumers are ready Ulf Hansson
2020-06-15 18:05   ` Saravana Kannan
2020-06-16  6:49     ` Ulf Hansson
2020-06-16  7:05       ` Saravana Kannan
2020-06-24  9:57 ` [PATCH 0/5] cpuidle: psci: Various improvements for PSCI PM domains Ulf Hansson
2020-06-30 10:23 ` Lukasz Luba
2020-07-07 11:53   ` Ulf Hansson
2020-07-07 12:37     ` Lukasz Luba
2020-07-07 12:51       ` Ulf Hansson
2020-07-07 13:26         ` Lukasz Luba

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