Commit 82c3fbff authored Jul 19, 2018 by Lukas Wunner Committed by Bjorn Helgaas Jul 31, 2018

PCI: sysfs: Resume to D0 on function reset

When performing a function reset via sysfs, the device's config space is
accessed in places such as pcie_flr() and its MMIO space is accessed e.g.
in reset_ivb_igd(), so ensure accessibility by resuming the device to D0.

Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Keith Busch <keith.busch@intel.com>
Cc: Yinghai Lu <yinghai@kernel.org>

parent 4417aa45

drivers/pci/pci-sysfs.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1449,7 +1449,9 @@ static ssize_t reset_store(struct device dev, struct device_attribute attr,
		if (val != 1)
		return -EINVAL;

		pm_runtime_get_sync(dev);
		result = pci_reset_function(pdev);
		pm_runtime_put(dev);
		if (result < 0)
		return result;

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