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
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