linux-kernel - [PATCH 5.6 199/254] vfio: platform: Switch to platform_get_irq

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Message-Id: <20200416131351.026993633@linuxfoundation.org>
Date:   Thu, 16 Apr 2020 15:24:48 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Eric Auger <eric.auger@...hat.com>,
        Andre Przywara <andre.przywara@....com>,
        Alex Williamson <alex.williamson@...hat.com>
Subject: [PATCH 5.6 199/254] vfio: platform: Switch to platform_get_irq_optional()

From: Eric Auger <eric.auger@...hat.com>

commit 723fe298ad85ad1278bd2312469ad14738953cc6 upstream.

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@...hat.com>
Cc: stable@...r.kernel.org # v5.3+
Reviewed-by: Andre Przywara <andre.przywara@....com>
Tested-by: Andre Przywara <andre.przywara@....com>
Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/vfio/platform/vfio_platform.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 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_
 {
 	struct platform_device *pdev = (struct platform_device *) vdev->opaque;
 
-	return platform_get_irq(pdev, i);
+	return platform_get_irq_optional(pdev, i);
 }
 
 static int vfio_platform_probe(struct platform_device *pdev)