diff mbox series

[01/49] regmap-irq: Fix a bug in regmap_irq_enable() for type_in_mask chips

Message ID 20220620200644.1961936-2-aidanmacdonald.0x0@gmail.com (mailing list archive)
State New, archived
Headers show
Series regmap-irq cleanups and refactoring | expand

Commit Message

Aidan MacDonald June 20, 2022, 8:05 p.m. UTC 
When enabling a type_in_mask irq, the type_buf contents must be
AND'd with the mask of the IRQ we're enabling to avoid enabling
other IRQs by accident, which can happen if several type_in_mask
irqs share a mask register.

Fixes: bc998a730367 ("regmap: irq: handle HW using separate rising/falling edge interrupts")
Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@gmail.com>
---
 drivers/base/regmap/regmap-irq.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 400c7412a7dc..4f785bc7981c 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -252,6 +252,7 @@  static void regmap_irq_enable(struct irq_data *data)
 	struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
 	struct regmap *map = d->map;
 	const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
+	unsigned int reg = irq_data->reg_offset / map->reg_stride;
 	unsigned int mask, type;
 
 	type = irq_data->type.type_falling_val | irq_data->type.type_rising_val;
@@ -268,14 +269,14 @@  static void regmap_irq_enable(struct irq_data *data)
 	 * at the corresponding offset in regmap_irq_set_type().
 	 */
 	if (d->chip->type_in_mask && type)
-		mask = d->type_buf[irq_data->reg_offset / map->reg_stride];
+		mask = d->type_buf[reg] & irq_data->mask;
 	else
 		mask = irq_data->mask;
 
 	if (d->chip->clear_on_unmask)
 		d->clear_status = true;
 
-	d->mask_buf[irq_data->reg_offset / map->reg_stride] &= ~mask;
+	d->mask_buf[reg] &= ~mask;
 }
 
 static void regmap_irq_disable(struct irq_data *data)