From: Vladimir Oltean <vladimir.oltean@nxp.com>
To: Mark Brown <broonie@kernel.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Lee Jones <lee.jones@linaro.org>, Arnd Bergmann <arnd@arndb.de>,
Thomas Gleixner <tglx@linutronix.de>,
Marc Zyngier <maz@kernel.org>,
Hou Zhiqiang <Zhiqiang.Hou@nxp.com>, Biwen Li <biwen.li@nxp.com>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] Use raw spinlocks in the ls-extirq driver
Date: Wed, 25 Aug 2021 23:50:39 +0300 [thread overview]
Message-ID: <20210825205041.927788-1-vladimir.oltean@nxp.com> (raw)
The ls-extirq irqchip driver accesses regmap inside its implementation
of the struct irq_chip :: irq_set_type method, and currently regmap
only knows to lock using normal spinlocks. But the method above wants
raw spinlock context, so this isn't going to work and triggers a
"[ BUG: Invalid wait context ]" splat.
The best we can do given the arrangement of the code is to patch regmap
and the syscon driver: regmap to support raw spinlocks, and syscon to
request them on behalf of its ls-extirq consumer.
Link: https://lore.kernel.org/lkml/20210825135438.ubcuxm5vctt6ne2q@skbuf/T/#u
Vladimir Oltean (2):
regmap: teach regmap to use raw spinlocks if requested in the config
mfd: syscon: request a regmap with raw spinlocks for some devices
drivers/base/regmap/internal.h | 4 ++++
drivers/base/regmap/regmap.c | 35 +++++++++++++++++++++++++++++-----
drivers/mfd/syscon.c | 16 ++++++++++++++++
include/linux/regmap.h | 2 ++
4 files changed, 52 insertions(+), 5 deletions(-)
--
2.25.1
next reply other threads:[~2021-08-25 20:51 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-25 20:50 Vladimir Oltean [this message]
2021-08-25 20:50 ` [PATCH 1/2] regmap: teach regmap to use raw spinlocks if requested in the config Vladimir Oltean
2021-08-26 23:01 ` Thomas Gleixner
2021-08-27 16:12 ` Vladimir Oltean
2021-08-27 19:59 ` Thomas Gleixner
2021-08-30 10:49 ` Vladimir Oltean
2021-08-30 11:02 ` Rasmus Villemoes
2021-08-30 12:42 ` Mark Brown
2021-08-30 12:19 ` Mark Brown
2021-08-30 14:16 ` Thomas Gleixner
2021-09-01 16:05 ` Mark Brown
2021-09-02 8:35 ` Thomas Gleixner
2021-08-25 20:50 ` [PATCH 2/2] mfd: syscon: request a regmap with raw spinlocks for some devices Vladimir Oltean
2021-08-25 21:24 ` Arnd Bergmann
2021-08-25 22:00 ` Vladimir Oltean
2021-08-26 9:24 ` Arnd Bergmann
2021-08-26 13:57 ` Vladimir Oltean
2021-08-26 14:48 ` Arnd Bergmann
2021-09-06 9:18 ` Lee Jones
2021-08-26 12:51 ` (subset) [PATCH 0/2] Use raw spinlocks in the ls-extirq driver Mark Brown
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=20210825205041.927788-1-vladimir.oltean@nxp.com \
--to=vladimir.oltean@nxp.com \
--cc=Zhiqiang.Hou@nxp.com \
--cc=arnd@arndb.de \
--cc=biwen.li@nxp.com \
--cc=broonie@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=lee.jones@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@rasmusvillemoes.dk \
--cc=maz@kernel.org \
--cc=rafael@kernel.org \
--cc=tglx@linutronix.de \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.