Commit 8a18f428 authored Dec 21, 2016 by Chen Yu Committed by Greg Kroah-Hartman Jan 11, 2017

platform: Print the resource range if device failed to claim



Sometimes we have the following error message:
 platform MSFT0101:00: failed to claim resource 1
 acpi MSFT0101:00: platform device creation failed: -16
But there is not enough information to figure out which resource range
failed to claim.

Thus print the resource range at first-place thus /proc/iomem or
ioports should tell us who already claimed this resource, then
the driver bug or incorrect resource assignment which is running
into this conflict can be diagnosed:
 platform MSFT0101:00: failed to claim resource 1: [mem 0xfed40000-0xfed40fff]
 acpi MSFT0101:00: platform device creation failed: -16

Suggested-by: Len Brown <lenb@kernel.org>
Reported-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent a0244a8d

drivers/base/platform.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -396,7 +396,7 @@ int platform_device_add(struct platform_device *pdev)
		}

		if (p && insert_resource(p, r)) {
		dev_err(&pdev->dev, "failed to claim resource %d\n", i);
		dev_err(&pdev->dev, "failed to claim resource %d: %pR\n", i, r);
		ret = -EBUSY;
		goto failed;
		}

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