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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Sean Young <sean@mess.org>,
        Mauro Carvalho Chehab <mchehab+huawei@kernel.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.4 025/190] media: ite-cir: check for receive overflow
Date:   Thu, 20 May 2021 11:21:29 +0200
Message-Id: <20210520092103.007082724@linuxfoundation.org>
In-Reply-To: <20210520092102.149300807@linuxfoundation.org>
References: <20210520092102.149300807@linuxfoundation.org>
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From: Sean Young <sean@mess.org>

[ Upstream commit 28c7afb07ccfc0a939bb06ac1e7afe669901c65a ]

It's best if this condition is reported.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/media/rc/ite-cir.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/media/rc/ite-cir.c b/drivers/media/rc/ite-cir.c
index 63165d324fff..7d3e50d94d86 100644
--- a/drivers/media/rc/ite-cir.c
+++ b/drivers/media/rc/ite-cir.c
@@ -292,8 +292,14 @@ static irqreturn_t ite_cir_isr(int irq, void *data)
 	/* read the interrupt flags */
 	iflags = dev->params.get_irq_causes(dev);
 
+	/* Check for RX overflow */
+	if (iflags & ITE_IRQ_RX_FIFO_OVERRUN) {
+		dev_warn(&dev->rdev->dev, "receive overflow\n");
+		ir_raw_event_reset(dev->rdev);
+	}
+
 	/* check for the receive interrupt */
-	if (iflags & (ITE_IRQ_RX_FIFO | ITE_IRQ_RX_FIFO_OVERRUN)) {
+	if (iflags & ITE_IRQ_RX_FIFO) {
 		/* read the FIFO bytes */
 		rx_bytes =
 			dev->params.get_rx_bytes(dev, rx_buf,
-- 
2.30.2