[PATCH 6.0 243/314] usb: typec: tipd: Prevent uninitialized event{1,2} in IRQ handler

[Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>]

From: Sven Peter <sven@xxxxxxxxxxxxx>

commit 6d8fc203b28ff8f6115fbe5eaf584de8b824f4fa upstream.

If reading TPS_REG_INT_EVENT1/2 fails in the interrupt handler event1
and event2 may be uninitialized when they are used to determine
IRQ_HANDLED vs. IRQ_NONE in the error path.

Fixes: c7260e29dd20 ("usb: typec: tipd: Add short-circuit for no irqs")
Fixes: 45188f27b3d0 ("usb: typec: tipd: Add support for Apple CD321X")
Cc: stable <stable@xxxxxxxxxx>
Signed-off-by: Sven Peter <sven@xxxxxxxxxxxxx>
Reviewed-by: Eric Curtin <ecurtin@xxxxxxxxxx>
Reviewed-by: Heikki Krogerus <heikki.krogerus@xxxxxxxxxxxxxxx>
Reviewed-by: Guido Günther <agx@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221102161542.30669-1-sven@xxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/usb/typec/tipd/core.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -474,7 +474,7 @@ static void tps6598x_handle_plug_event(s
 static irqreturn_t cd321x_interrupt(int irq, void *data)
 {
 	struct tps6598x *tps = data;
-	u64 event;
+	u64 event = 0;
 	u32 status;
 	int ret;
 
@@ -519,8 +519,8 @@ err_unlock:
 static irqreturn_t tps6598x_interrupt(int irq, void *data)
 {
 	struct tps6598x *tps = data;
-	u64 event1;
-	u64 event2;
+	u64 event1 = 0;
+	u64 event2 = 0;
 	u32 status;
 	int ret;