PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume
authorMika Westerberg <mika.westerberg@linux.intel.com>
Wed, 23 May 2018 22:14:39 +0000 (17:14 -0500)
committerBjorn Helgaas <bhelgaas@google.com>
Wed, 23 May 2018 22:42:53 +0000 (17:42 -0500)
commit13c65840feab8109194f9490c9870587173cb29d
tree10b5720ecb527552f321aca243d39f36a859ee66
parent5d9c6b8ae987c7207ee665be81c4ad04949ad15a
PCI: pciehp: Clear Presence Detect and Data Link Layer Status Changed on resume

After a suspend/resume cycle the Presence Detect or Data Link Layer Status
Changed bits might be set.  If we don't clear them those events will not
fire anymore and nothing happens for instance when a device is now
hot-unplugged.

Fix this by clearing those bits in a newly introduced function
pcie_reenable_notification().  This should be fine because immediately
after, we check if the adapter is still present by reading directly from
the status register.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: stable@vger.kernel.org
drivers/pci/hotplug/pciehp.h
drivers/pci/hotplug/pciehp_core.c
drivers/pci/hotplug/pciehp_hpc.c