[PATCH 4.9 60/77] PCI: pciehp: Report power fault only once until we clear it

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Keith Busch commit 7612b3b28c0b900dcbcdf5e9b9747cc20a1e2455 upstream. When a power fault occurs, the power controller sets Power Fault Detected in the Slot Status

[PATCH 4.9 60/77] PCI: pciehp: Report power fault only once until we clear it

4.9-stable review patch. If anyone has any objections, please let me know. -- From: Keith Busch commit 7612b3b28c0b900dcbcdf5e9b9747cc20a1e2455 upstream. When a power fault occurs, the power controller sets Power Fault Detected in the Slot Status register, and pciehp_isr()