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linux/drivers/pinctrl/meson
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Bartosz Golaszewski e81d1bc4ea pinctrl: meson: mark the GPIO controller as sleeping 
commit 28f2406838 upstream.

The GPIO controller is configured as non-sleeping but it uses generic
pinctrl helpers which use a mutex for synchronization.

This can cause the following lockdep splat with shared GPIOs enabled on
boards which have multiple devices using the same GPIO:

BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:591
in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 142, name:
kworker/u25:3
preempt_count: 1, expected: 0
RCU nest depth: 0, expected: 0
INFO: lockdep is turned off.
irq event stamp: 46379
hardirqs last  enabled at (46379): [<ffff8000813acb24>]
_raw_spin_unlock_irqrestore+0x74/0x78
hardirqs last disabled at (46378): [<ffff8000813abf38>]
_raw_spin_lock_irqsave+0x84/0x88
softirqs last  enabled at (46330): [<ffff8000800c71b4>]
handle_softirqs+0x4c4/0x4dc
softirqs last disabled at (46295): [<ffff800080010674>]
__do_softirq+0x14/0x20
CPU: 1 UID: 0 PID: 142 Comm: kworker/u25:3 Tainted: G C
6.19.0-rc4-next-20260105+ #11963 PREEMPT
Tainted: [C]=CRAP
Hardware name: Khadas VIM3 (DT)
Workqueue: events_unbound deferred_probe_work_func
Call trace:
  show_stack+0x18/0x24 (C)
  dump_stack_lvl+0x90/0xd0
  dump_stack+0x18/0x24
  __might_resched+0x144/0x248
  __might_sleep+0x48/0x98
  __mutex_lock+0x5c/0x894
  mutex_lock_nested+0x24/0x30
  pinctrl_get_device_gpio_range+0x44/0x128
  pinctrl_gpio_set_config+0x40/0xdc
  gpiochip_generic_config+0x28/0x3c
  gpio_do_set_config+0xa8/0x194
  gpiod_set_config+0x34/0xfc
  gpio_shared_proxy_set_config+0x6c/0xfc [gpio_shared_proxy]
  gpio_do_set_config+0xa8/0x194
  gpiod_set_transitory+0x4c/0xf0
  gpiod_configure_flags+0xa4/0x480
  gpiod_find_and_request+0x1a0/0x574
  gpiod_get_index+0x58/0x84
  devm_gpiod_get_index+0x20/0xb4
  devm_gpiod_get+0x18/0x24
  mmc_pwrseq_emmc_probe+0x40/0xb8
  platform_probe+0x5c/0xac
  really_probe+0xbc/0x298
  __driver_probe_device+0x78/0x12c
  driver_probe_device+0xdc/0x164
  __device_attach_driver+0xb8/0x138
  bus_for_each_drv+0x80/0xdc
  __device_attach+0xa8/0x1b0

Fixes: 6ac7309511 ("pinctrl: add driver for Amlogic Meson SoCs")
Cc: stable@vger.kernel.org
Reported-by: Marek Szyprowski <m.szyprowski@samsung.com>
Closes: https://lore.kernel.org/all/00107523-7737-4b92-a785-14ce4e93b8cb@samsung.com/
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Linus Walleij <linusw@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2026-02-06 16:57:37 +01:00
..
Kconfig pinctrl: meson: Do not enable by default during compile testing 2025-04-15 10:08:42 +02:00
Makefile pinctrl: Add driver support for Amlogic SoCs 2025-02-28 00:03:18 +01:00
pinctrl-amlogic-a4.c Pin control changes for the v6.18 kernel cycle: 2025-10-01 13:14:48 -07:00
pinctrl-amlogic-c3.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-amlogic-t7.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson-a1.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson-axg-pmx.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson-axg-pmx.h pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson-axg.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson-g12a.c pinctrl: meson-g12a: add GPIOC_7 pcie_clkreqn pinmux 2025-08-19 14:18:38 +02:00
pinctrl-meson-gxbb.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson-gxl.c pinctrl: meson-gxl: add missing i2c_d pinmux 2025-08-28 23:06:03 +02:00
pinctrl-meson-s4.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson.c pinctrl: meson: mark the GPIO controller as sleeping 2026-02-06 16:57:37 +01:00
pinctrl-meson.h pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson8-pmx.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson8-pmx.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 446 2019-06-05 17:37:18 +02:00
pinctrl-meson8.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00
pinctrl-meson8b.c pinctrl: meson: Constify some structures 2024-08-23 18:01:42 +02:00