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usb: typec: tcpci_rt1711h: avoid screaming irq causing boot hangs

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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.stultz@linaro.org

Fixes: ce08eaeb63 ("staging: typec: rt1711h typec chip driver")
Cc: stable <stable@vger.kernel.org> # v4.18+
Cc: John Stultz <john.stultz@linaro.org>
Reported-and-tested-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Li Jun <jun.li@nxp.com>
Link: https://lore.kernel.org/r/20200604112118.38062-1-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Jun 2020-06-04 19:21:18 +08:00 committed by Greg Kroah-Hartman
parent 07c112fb09
commit 302c570bf3
1 changed files with 10 additions and 21 deletions
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31
drivers/usb/typec/tcpm/tcpci_rt1711h.c
View File

@ -179,26 +179,6 @@ static irqreturn_t rt1711h_irq(int irq, void *dev_id)
return tcpci_irq(chip->tcpci); 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) static int rt1711h_sw_reset(struct rt1711h_chip *chip)
{ {
int ret; int ret;
@ -260,7 +240,8 @@ static int rt1711h_probe(struct i2c_client *client,
if (ret < 0) if (ret < 0)
return ret; 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) if (ret < 0)
return ret; return ret;
@ -271,6 +252,14 @@ static int rt1711h_probe(struct i2c_client *client,
if (IS_ERR_OR_NULL(chip->tcpci)) if (IS_ERR_OR_NULL(chip->tcpci))
return PTR_ERR(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; return 0;
} }