From: Sven Peter <sven@svenpeter.dev>
To: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Cc: "Sven Peter" <sven@svenpeter.dev>,
"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
"Guido Günther" <agx@sigxcpu.org>,
"Bryan O'Donoghue" <bryan.odonoghue@linaro.org>,
linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
"Hector Martin" <marcan@marcan.st>,
"Mohamed Mediouni" <mohamed.mediouni@caramail.com>,
"Stan Skowronek" <stan@corellium.com>,
"Mark Kettenis" <mark.kettenis@xs4all.nl>,
"Alexander Graf" <graf@amazon.com>,
"Alyssa Rosenzweig" <alyssa@rosenzweig.io>
Subject: [PATCH v2 3/6] usb: typec: tipd: Add short-circuit for no irqs
Date: Thu, 23 Sep 2021 20:13:18 +0200 [thread overview]
Message-ID: <20210923181321.3044-4-sven@svenpeter.dev> (raw)
In-Reply-To: <20210923181321.3044-1-sven@svenpeter.dev>
If no interrupts are set in IntEventX directly skip to the end of the
interrupt handler and return IRQ_NONE instead of IRQ_HANDLED.
This possibly allows to detect spurious interrupts if the i2c bus is fast
enough.
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Sven Peter <sven@svenpeter.dev>
---
changes since v1:
- added Heikki's r-b
- s/event/(event1 | event2)/
drivers/usb/typec/tipd/core.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/typec/tipd/core.c b/drivers/usb/typec/tipd/core.c
index 162d405baa92..cd1e37eb8a0c 100644
--- a/drivers/usb/typec/tipd/core.c
+++ b/drivers/usb/typec/tipd/core.c
@@ -476,6 +476,9 @@ static irqreturn_t tps6598x_interrupt(int irq, void *data)
}
trace_tps6598x_irq(event1, event2);
+ if (!(event1 | event2))
+ goto err_unlock;
+
if (!tps6598x_read_status(tps, &status))
goto err_clear_ints;
@@ -498,7 +501,9 @@ static irqreturn_t tps6598x_interrupt(int irq, void *data)
err_unlock:
mutex_unlock(&tps->lock);
- return IRQ_HANDLED;
+ if (event1 | event2)
+ return IRQ_HANDLED;
+ return IRQ_NONE;
}
static int tps6598x_check_mode(struct tps6598x *tps)
--
2.25.1
next prev parent reply other threads:[~2021-09-23 18:14 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-23 18:13 [PATCH v2 0/6] usb: typec: tipd: Add Apple M1 support Sven Peter
2021-09-23 18:13 ` [PATCH v2 1/6] dt-bindings: usb: tps6598x: Add Apple CD321x compatible Sven Peter
2021-09-23 18:13 ` [PATCH v2 2/6] usb: typec: tipd: Split interrupt handler Sven Peter
2021-09-23 18:13 ` Sven Peter [this message]
2021-09-23 18:13 ` [PATCH v2 4/6] usb: typec: tipd: Add support for Apple CD321X Sven Peter
2021-09-24 14:41 ` Heikki Krogerus
2021-09-24 14:58 ` Sven Peter
2021-09-27 8:03 ` Heikki Krogerus
2021-09-23 18:13 ` [PATCH v2 5/6] usb: typec: tipd: Switch CD321X power state to S0 Sven Peter
2021-09-23 18:13 ` [PATCH v2 6/6] usb: typec: tipd: Remove FIXME about testing with I2C_FUNC_I2C Sven Peter
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