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PCI/AER: Clear error status registers during enumeration and restore

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AER errors might be recorded when powering-on devices.  These errors can be
ignored, so firmware usually clears them before the OS enumerates devices.
However, firmware is not involved when devices are added via hotplug, so
the OS may discover power-up errors that should be ignored.  The same may
happen when powering up devices when resuming after suspend.

Clear the AER error status registers during enumeration and resume.

[bhelgaas: changelog, remove repetitive comments]
Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Taku Izumi
2015-09-17 10:09:37 -05:00
committed by Bjorn Helgaas
parent 6ff33f3902
commit b07461a8e4
4 changed files with 39 additions and 0 deletions
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3
drivers/pci/probe.c
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@@ -12,6 +12,7 @@
#include <linux/module.h>
#include <linux/cpumask.h>
#include <linux/pci-aspm.h>
#include <linux/aer.h>
#include <asm-generic/pci-bridge.h>
#include "pci.h"
@@ -1621,6 +1622,8 @@ static void pci_init_capabilities(struct pci_dev *dev)
/* Enable ACS P2P upstream forwarding */
pci_enable_acs(dev);
pci_cleanup_aer_error_status_regs(dev);
}
static void pci_set_msi_domain(struct pci_dev *dev)