[PATCH v2] usb: typec: fusb302: Switch to threaded IRQ handler

[Alexey Charkov]

FUSB302 fails to probe with -EINVAL if its interrupt line is connected via
an I2C GPIO expander, such as TI TCA6416.

Switch the interrupt handler to a threaded one, which also works behind
such GPIO expanders.

Cc: stable@xxxxxxxxxxxxxxx
Fixes: 309b6341d557 ("usb: typec: fusb302: Revert incorrect threaded irq fix")
Signed-off-by: Alexey Charkov <alchark@xxxxxxxxxxx>
---
Changes in v2:
- Re-added the IRQF_ONESHOT flag to the request_threaded_irq() call
  (thanks Hans de Goede and Sebastian Andrzej Siewior)
- Link to v1: https://lore.kernel.org/r/20260311-fusb302-irq-v1-1-7e7105706629@xxxxxxxxxxx
---
 drivers/usb/typec/tcpm/fusb302.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/usb/typec/tcpm/fusb302.c b/drivers/usb/typec/tcpm/fusb302.c
index ce7069fb4be6..889c4c29c1b8 100644
--- a/drivers/usb/typec/tcpm/fusb302.c
+++ b/drivers/usb/typec/tcpm/fusb302.c
@@ -1764,8 +1764,9 @@ static int fusb302_probe(struct i2c_client *client)
 		goto destroy_workqueue;
 	}
 
-	ret = request_irq(chip->gpio_int_n_irq, fusb302_irq_intn,
-			  IRQF_TRIGGER_LOW, "fsc_interrupt_int_n", chip);
+	ret = request_threaded_irq(chip->gpio_int_n_irq, NULL, fusb302_irq_intn,
+				   IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+				   "fsc_interrupt_int_n", chip);
 	if (ret < 0) {
 		dev_err(dev, "cannot request IRQ for GPIO Int_N, ret=%d", ret);
 		goto tcpm_unregister_port;

---
base-commit: 95c541ddfb0815a0ea8477af778bb13bb075079a
change-id: 20260311-fusb302-irq-316834765871

Best regards,
-- 
Alexey Charkov <alchark@xxxxxxxxxxx>