From 341fd15e2e18c24d5c738496cfc3d7a272241201 Mon Sep 17 00:00:00 2001
From: Yassine Oudjana <y.oudjana@protonmail.com>
Date: Mon, 7 Nov 2022 18:33:17 +0300
Subject: [PATCH] extcon: usbc-tusb320: Call the Type-C IRQ handler only if a port is registered
Git-commit: 341fd15e2e18c24d5c738496cfc3d7a272241201
Patch-mainline: v6.1-rc6
References: git-fixes
Commit bf7571c00dca ("extcon: usbc-tusb320: Add USB TYPE-C support")
added an optional Type-C interface to the driver but missed to check
if it is in use when calling the IRQ handler. This causes an oops on
devices currently using the old extcon interface. Check if a Type-C
port is registered before calling the Type-C IRQ handler.
Fixes: bf7571c00dca ("extcon: usbc-tusb320: Add USB TYPE-C support")
Signed-off-by: Yassine Oudjana <y.oudjana@protonmail.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20221107153317.657803-1-y.oudjana@protonmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/extcon/extcon-usbc-tusb320.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/extcon/extcon-usbc-tusb320.c b/drivers/extcon/extcon-usbc-tusb320.c
index 41041ff0fadb..2a120d8d3c27 100644
--- a/drivers/extcon/extcon-usbc-tusb320.c
+++ b/drivers/extcon/extcon-usbc-tusb320.c
@@ -327,7 +327,13 @@ static irqreturn_t tusb320_irq_handler(int irq, void *dev_id)
return IRQ_NONE;
tusb320_extcon_irq_handler(priv, reg);
- tusb320_typec_irq_handler(priv, reg);
+
+ /*
+ * Type-C support is optional. Only call the Type-C handler if a
+ * port had been registered previously.
+ */
+ if (priv->port)
+ tusb320_typec_irq_handler(priv, reg);
regmap_write(priv->regmap, TUSB320_REG9, reg);
--
2.35.3