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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>
This commit is contained in:
Lukas Wunner 2018-07-19 17:27:58 -05:00 committed by Bjorn Helgaas
parent 4417aa45c1
commit 82c3fbff6e
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/pci-sysfs.c
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@ -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;