On Wed, Feb 08, 2017 at 12:46:26AM -0800, Yinghai Lu wrote:
> after that change will get:
>
> sca05-0a81fd7f:~ # echo 1 > /sys/bus/pci/slots/7/power
> [ 300.949937] pci_hotplug: power_write_file: power = 1
> [ 300.955502] pciehp 0000:73:00.0:pcie004: pciehp_get_power_status: SLOTCTRL a8 value read 17f1
> [ 300.982557] pciehp 0000:73:00.0:pcie004: pending interrupts 0x0010 from Slot Status
Can anybody explain this Command Completed interrupt? I think we should be
in this path:
pciehp_sysfs_enable_slot
pciehp_enable_slot
pciehp_get_adapter_status
pciehp_get_power_status
"SLOTCTRL a8 value read 17f1" (DLLSCE PWR_OFF PWR_IND_OFF CCIE HPIE ATTN_IND_OFF ABPE)
board_added
pciehp_power_on_slot
pcie_write_cmd(ctrl, PCI_EXP_SLTCTL_PWR_ON, PCI_EXP_SLTCTL_PCC)
"SLOTCTRL a8 write cmd 0" (PWR_ON)
pciehp_link_enable
__pciehp_link_set
I don't see a write to SLTCTL between pciehp_get_power_status() and
pciehp_power_on_slot(), so I don't know why we see a Command Completed
interrupt.
> [ 300.991171] pciehp 0000:73:00.0:pcie004: pciehp_power_on_slot: SLOTCTRL a8 write cmd 0
> [ 301.000033] pciehp 0000:73:00.0:pcie004: pciehp_green_led_blink: SLOTCTRL a8 write cmd 200
> [ 301.009274] pciehp 0000:73:00.0:pcie004: pending interrupts 0x0010 from Slot Status
> [ 301.662172] pciehp 0000:73:00.0:pcie004: pciehp_check_link_active: lnk_status = f083
> [ 301.670827] pciehp 0000:73:00.0:pcie004: pending interrupts 0x0108 from Slot Status
> [ 301.679376] pciehp 0000:73:00.0:pcie004: Slot(7): Link Up
> [ 301.685463] pciehp 0000:73:00.0:pcie004: Slot(7): Link Up event ignored; already powering on
> [ 301.685508] pciehp 0000:73:00.0:pcie004: pciehp_check_link_active: lnk_status = f083
> [ 302.005967] pciehp 0000:73:00.0:pcie004: pciehp_check_link_status: lnk_status = f083
> [ 302.014859] pci 0000:74:00.0: [15b3:1003] type 00 class 0x0c0600
