From: William Breathitt Gray <william.gray@linaro.org>
To: Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <brgl@bgdev.pl>
Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org,
William Breathitt Gray <william.gray@linaro.org>
Subject: [PATCH 0/2] Fix possible deadlocks for i8255 GPIO drivers
Date: Mon, 3 Apr 2023 13:53:12 -0400 [thread overview]
Message-ID: <cover.1680543810.git.william.gray@linaro.org> (raw)
The 104-dio-48e and 104-idi-48 drivers leverage regmap-irq to handle
IRQ. The default regmap locking utilizes spinlocks but this can result
in deadlocks for IRQ chips when running -rt kernels [0]. Enable
use_raw_spinlock for the regmap_config of these drivers to prevent such.
[0] https://lore.kernel.org/all/1466065537-82027-1-git-send-email-mika.westerberg@linux.intel.com/
William Breathitt Gray (2):
gpio: 104-dio-48e: Enable use_raw_spinlock for dio48e_regmap_config
gpio: 104-idi-48: Enable use_raw_spinlock for idi48_regmap_config
drivers/gpio/gpio-104-dio-48e.c | 1 +
drivers/gpio/gpio-104-idi-48.c | 1 +
2 files changed, 2 insertions(+)
base-commit: d49765b5f4320a402fbc4ed5edfd73d87640f27c
--
2.39.2
next reply other threads:[~2023-04-03 17:53 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-03 17:53 William Breathitt Gray [this message]
2023-04-03 17:53 ` [PATCH 1/2] gpio: 104-dio-48e: Enable use_raw_spinlock for dio48e_regmap_config William Breathitt Gray
2023-04-03 17:53 ` [PATCH 2/2] gpio: 104-idi-48: Enable use_raw_spinlock for idi48_regmap_config William Breathitt Gray
2023-04-04 14:01 ` [PATCH 0/2] Fix possible deadlocks for i8255 GPIO drivers Linus Walleij
2023-04-11 19:08 ` Bartosz Golaszewski
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