From: "Rafael J. Wysocki" <rjw@rjwysocki.net>
To: Linux PM <linux-pm@vger.kernel.org>,
"elaine.zhang" <zhangqing@rock-chips.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Ulf Hansson <ulf.hansson@linaro.org>
Subject: [PATCH v2 0/2] PM: runtime: Update device status before letting suppliers suspend (another take)
Date: Fri, 19 Mar 2021 15:42:58 +0100 [thread overview]
Message-ID: <4641414.31r3eYUQgx@kreacher> (raw)
In-Reply-To: <5448054.DvuYhMxLoT@kreacher>
On Thursday, March 18, 2021 7:06:54 PM CET Rafael J. Wysocki wrote:
> Hi All,
>
> The previous attempt to address the issue tackled by this series, commit
> 44cc89f76464 ("PM: runtime: Update device status before letting suppliers
> suspend") was incorrect, because it introduced a rather nasty race condition
> into __rpm_callback(), so let's revert it (patch [1/2]).
>
> Instead, let's avoid suspending the suppliers immediately after dropping the
> PM-runtime references to them and do that later, when the status of the
> consumer has changed to RPM_SUSPENDED.
>
> Please see the patch changelogs for details.
>
> Elaine, please test this series on the system where you saw the original
> problem.
The above still applies.
The v2 is sent because of some updates in the second patch, plus the tags from Ulf.
Thanks!
next prev parent reply other threads:[~2021-03-19 14:49 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-18 18:06 [PATCH v1 0/2] PM: runtime: Update device status before letting suppliers suspend (another take) Rafael J. Wysocki
2021-03-18 18:09 ` [PATCH v1 1/2] Revert "PM: runtime: Update device status before letting suppliers suspend" Rafael J. Wysocki
2021-03-19 13:29 ` Ulf Hansson
2021-03-19 13:43 ` Rafael J. Wysocki
2021-03-18 18:15 ` [PATCH v1 2/2] PM: runtime: Defer suspending suppliers Rafael J. Wysocki
2021-03-19 13:29 ` Ulf Hansson
2021-03-19 13:48 ` Rafael J. Wysocki
2021-03-19 14:42 ` Rafael J. Wysocki [this message]
2021-03-19 14:47 ` [PATCH v2 1/2] Revert "PM: runtime: Update device status before letting suppliers suspend" Rafael J. Wysocki
2021-03-19 14:47 ` [PATCH v2 2/2] PM: runtime: Defer suspending suppliers Rafael J. Wysocki
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