From: Li Jun <jun...@nxp.com> commit 302c570bf36e997d55ad0d60628a2feec76954a4 upstream.
John reported screaming irq caused by rt1711h when system boot[1], this is because irq request is done before tcpci_register_port(), so the chip->tcpci has not been setup, irq handler is entered but can't do anything, this patch is to address this by moving the irq request after tcpci_register_port(). [1] https://lore.kernel.org/linux-usb/20200530040157.31038-1-john.stu...@linaro.org Fixes: ce08eaeb6388 ("staging: typec: rt1711h typec chip driver") Cc: stable <sta...@vger.kernel.org> # v4.18+ Cc: John Stultz <john.stu...@linaro.org> Reported-and-tested-by: John Stultz <john.stu...@linaro.org> Reviewed-by: Guenter Roeck <li...@roeck-us.net> Reviewed-by: Heikki Krogerus <heikki.kroge...@linux.intel.com> Signed-off-by: Li Jun <jun...@nxp.com> Link: https://lore.kernel.org/r/20200604112118.38062-1-jun...@nxp.com Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- drivers/usb/typec/tcpci_rt1711h.c | 31 ++++++++++--------------------- 1 file changed, 10 insertions(+), 21 deletions(-) diff --git a/drivers/usb/typec/tcpci_rt1711h.c b/drivers/usb/typec/tcpci_rt1711h.c index 017389021b96a..b56a0880a0441 100644 --- a/drivers/usb/typec/tcpci_rt1711h.c +++ b/drivers/usb/typec/tcpci_rt1711h.c @@ -179,26 +179,6 @@ static irqreturn_t rt1711h_irq(int irq, void *dev_id) return tcpci_irq(chip->tcpci); } -static int rt1711h_init_alert(struct rt1711h_chip *chip, - struct i2c_client *client) -{ - int ret; - - /* Disable chip interrupts before requesting irq */ - ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0); - if (ret < 0) - return ret; - - ret = devm_request_threaded_irq(chip->dev, client->irq, NULL, - rt1711h_irq, - IRQF_ONESHOT | IRQF_TRIGGER_LOW, - dev_name(chip->dev), chip); - if (ret < 0) - return ret; - enable_irq_wake(client->irq); - return 0; -} - static int rt1711h_sw_reset(struct rt1711h_chip *chip) { int ret; @@ -260,7 +240,8 @@ static int rt1711h_probe(struct i2c_client *client, if (ret < 0) return ret; - ret = rt1711h_init_alert(chip, client); + /* Disable chip interrupts before requesting irq */ + ret = rt1711h_write16(chip, TCPC_ALERT_MASK, 0); if (ret < 0) return ret; @@ -271,6 +252,14 @@ static int rt1711h_probe(struct i2c_client *client, if (IS_ERR_OR_NULL(chip->tcpci)) return PTR_ERR(chip->tcpci); + ret = devm_request_threaded_irq(chip->dev, client->irq, NULL, + rt1711h_irq, + IRQF_ONESHOT | IRQF_TRIGGER_LOW, + dev_name(chip->dev), chip); + if (ret < 0) + return ret; + enable_irq_wake(client->irq); + return 0; } -- 2.25.1
