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From:   Eric Auger <eric.auger@redhat.com>
To:     eric.auger.pro@gmail.com, eric.auger@redhat.com,
        linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
        alex.williamson@redhat.com
Cc:     andre.przywara@arm.com, stable@vger.kernel.org, cohuck@redhat.com
Subject: [PATCH] vfio: platform: Switch to platform_get_irq_optional()
Date:   Mon,  2 Mar 2020 21:37:15 +0100
Message-Id: <20200302203715.13889-1-eric.auger@redhat.com>
MIME-Version: 1.0
Content-Transfer-Encoding: quoted-printable
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Since commit 7723f4c5ecdb ("driver core: platform: Add an error
message to platform_get_irq*()"), platform_get_irq() calls dev_err()
on an error. As we enumerate all interrupts until platform_get_irq()
fails, we now systematically get a message such as:
"vfio-platform fff51000.ethernet: IRQ index 3 not found" which is
a false positive.

Let's use platform_get_irq_optional() instead.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Cc: stable@vger.kernel.org # v5.3+
---
 drivers/vfio/platform/vfio_platform.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/vfio/platform/vfio_platform.c b/drivers/vfio/platfor=
m/vfio_platform.c
index ae1a5eb98620..1e2769010089 100644
--- a/drivers/vfio/platform/vfio_platform.c
+++ b/drivers/vfio/platform/vfio_platform.c
@@ -44,7 +44,7 @@ static int get_platform_irq(struct vfio_platform_device=
 *vdev, int i)
 {
 	struct platform_device *pdev =3D (struct platform_device *) vdev->opaqu=
e;
=20
-	return platform_get_irq(pdev, i);
+	return platform_get_irq_optional(pdev, i);
 }
=20
 static int vfio_platform_probe(struct platform_device *pdev)
--=20
2.20.1