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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
Message-Id: <20210825205041.927788-1-vladimir.oltean@nxp.com>
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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