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patch "usb: typec: tcpci_rt1711h: avoid screaming irq causing boot hangs" added to usb-linus

PATCH [email protected] 1 participant 1 message Jun 18, 2020

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Stable branch USB USB Type-C class
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This is a note to let you know that I've just added the patch titled

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

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From 302c570bf36e997d55ad0d60628a2feec76954a4 Mon Sep 17 00:00:00 2001
From: Li Jun <[email protected]>
Date: Thu, 4 Jun 2020 19:21:18 +0800
Subject: usb: typec: tcpci_rt1711h: avoid screaming irq causing boot hangs

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/[email protected]

Fixes ce08eaeb6388 ("staging: typec: rt1711h typec chip driver")
Cc stable <[email protected]> # v4.18+
Cc John Stultz <[email protected]>
Reported-and-tested-by John Stultz <[email protected]>
Reviewed-by Guenter Roeck <[email protected]>
Reviewed-by Heikki Krogerus <[email protected]>
Signed-off-by Li Jun <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/usb/typec/tcpm/tcpci_rt1711h.c | 31 +++++++++-----------------
 1 file changed, 10 insertions(+), 21 deletions(-)
drivers/usb/typec/tcpm/tcpci_rt1711h.c +10 -21
index 017389021b96..b56a0880a044 100644
@@ -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;
 }
Signature · 1 line
2.27.0