From: heiko@sntech.de (Heiko Stuebner)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/2] iommu/rockchip: Handle errors returned from PM framework
Date: Wed, 08 Aug 2018 08:33:54 +0200 [thread overview]
Message-ID: <1943708.zxIcSzHDJ6@phil> (raw)
In-Reply-To: <20180807085406.3863-2-marc.zyngier@arm.com>
Am Dienstag, 7. August 2018, 10:54:05 CEST schrieb Marc Zyngier:
> pm_runtime_get_if_in_use can fail: either PM has been disabled
> altogether (-EINVAL), or the device hasn't been enabled yet (0).
> Sadly, the Rockchip IOMMU driver tends to conflate the two things
> by considering a non-zero return value as successful.
>
> This has the consequence of hiding other bugs, so let's handle this
> case throughout the driver, with a WARN_ON_ONCE so that we can try
> and work out what happened.
>
> Fixes: 0f181d3cf7d98 ("iommu/rockchip: Add runtime PM support")
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
With Rockchip platforms always selecting PM
[see other longer thread in reply to the patch]
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
next prev parent reply other threads:[~2018-08-08 6:33 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-07 8:54 [PATCH 0/2] iommu/rockchip: Runtime PM fixes Marc Zyngier
2018-08-07 8:54 ` [PATCH 1/2] iommu/rockchip: Handle errors returned from PM framework Marc Zyngier
2018-08-07 12:09 ` Heiko Stuebner
2018-08-07 12:31 ` Marc Zyngier
2018-08-07 13:15 ` Heiko Stuebner
2018-08-07 14:25 ` Marc Zyngier
2018-08-08 6:30 ` Heiko Stuebner
2018-08-08 6:33 ` Heiko Stuebner [this message]
2018-08-07 8:54 ` [PATCH 2/2] iommu/rockchip: Move irq request past pm_runtime_enable Marc Zyngier
2018-08-07 11:45 ` Heiko Stuebner
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1943708.zxIcSzHDJ6@phil \
--to=heiko@sntech.de \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox