[PATCH v2] gpio: mvebu: fix sleeping-while-atomic in mvebu_gpio_level_irq_mask()

[Bartosz Golaszewski]

mvebu_gpio_write_level_mask() is called with a raw spinlock taken but
the underlying regmap uses a standard spinlock which can sleep on
RT_PREEMPT kernels. Add the .use_raw_spinlock attribute to the
appropriate regmap config.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 2233bf7a92e7 ("gpio: mvebu: switch to regmap for register access")
Fixes: 4d305c227312 ("gpio: mvebu: name regmaps to fix debugfs collisions")
Closes: https://sashiko.dev/#/bug/linux-6bee0c4f-384c-494c-868e-07c420195d13
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>
---
Changes in v2:
- Also set .use_raw_spinlock in mvebu_gpio_percpu_regmap_config
  (sashiko)
- Reference earlier commits (the actual culprits) in Fixes: tags
- Link to v1: https://patch.msgid.link/20261105-gpio-mvebu-sleeping-while-atomic-v1-1-3ad7bb1c9e36@xxxxxxxxxxxxxxxx
---
 drivers/gpio/gpio-mvebu.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index 267e6d5bacd0d1c9de0ebb7e21233bc9e2cd3bad..92ce02441cc9923c51b3d2ec9c74578a0a5e859c 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -603,6 +603,7 @@ static const struct regmap_config mvebu_gpio_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
+	.use_raw_spinlock = true,
 };
 
 static const struct regmap_config mvebu_gpio_percpu_regmap_config = {
@@ -610,6 +611,7 @@ static const struct regmap_config mvebu_gpio_percpu_regmap_config = {
 	.reg_bits = 32,
 	.reg_stride = 4,
 	.val_bits = 32,
+	.use_raw_spinlock = true,
 };
 
 static const struct regmap_config mvebu_pwm_regmap_config = {

---
base-commit: ddfe51b0a0f5dc9e415cc2c8ad8db17532dd426b
change-id: 20261105-gpio-mvebu-sleeping-while-atomic-3b3fed029f7b

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@xxxxxxxxxxxxxxxx>