linux-kernel - [PATCH v1 4/5] media: staging: tegra-vde: Do not handle spurious interrupts

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Message-Id: <8d1b583bde182ab79a18f43df83f87affda6b174.1521300358.git.digetx@gmail.com>
Date:   Sat, 17 Mar 2018 18:28:14 +0300
From:   Dmitry Osipenko <digetx@...il.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v1 4/5] media: staging: tegra-vde: Do not handle spurious interrupts

Do not handle interrupts if we haven't asked for them, potentially that
could happen if HW wasn't programmed properly.

Signed-off-by: Dmitry Osipenko <digetx@...il.com>
---
 drivers/staging/media/tegra-vde/tegra-vde.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/staging/media/tegra-vde/tegra-vde.c b/drivers/staging/media/tegra-vde/tegra-vde.c
index 94b4db55cdb5..9e542c6288f1 100644
--- a/drivers/staging/media/tegra-vde/tegra-vde.c
+++ b/drivers/staging/media/tegra-vde/tegra-vde.c
@@ -935,6 +935,9 @@ static irqreturn_t tegra_vde_isr(int irq, void *data)
 {
 	struct tegra_vde *vde = data;
 
+	if (completion_done(&vde->decode_completion))
+		return IRQ_NONE;
+
 	tegra_vde_set_bits(vde, 0, vde->frameid + 0x208);
 	complete(&vde->decode_completion);
 
-- 
2.16.1