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Revert "PCI: pciehp: Add runtime PM support for PCIe hotplug ports"

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This reverts commit 68db9bc814.

Yinghai reported that the following manual hotplug sequence:

  # echo 0 > /sys/bus/pci/slots/8/power
  # echo 1 > /sys/bus/pci/slots/8/power

worked in v4.9, but fails in v4.10-rc1, and that reverting 68db9bc814
("PCI: pciehp: Add runtime PM support for PCIe hotplug ports") makes it
work again.

Fixes: 68db9bc814 ("PCI: pciehp: Add runtime PM support for PCIe hotplug ports")
Link: https://lkml.kernel.org/r/CAE9FiQVCMCa7iVyuwp9z6VrY0cE7V_xghuXip28Ft52=8QmTWw@mail.gmail.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=193951
Reported-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas
2017-02-03 08:53:51 -06:00
parent dfef358bd1
commit d98e092907
2 changed files with 6 additions and 12 deletions
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6
drivers/pci/hotplug/pciehp_ctrl.c
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@@ -31,7 +31,6 @@
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/pci.h>
#include "../pci.h"
#include "pciehp.h"
@@ -99,7 +98,6 @@ static int board_added(struct slot *p_slot)
pciehp_green_led_blink(p_slot);
/* Check link training status */
pm_runtime_get_sync(&ctrl->pcie->port->dev);
retval = pciehp_check_link_status(ctrl);
if (retval) {
ctrl_err(ctrl, "Failed to check link status\n");
@@ -120,14 +118,12 @@ static int board_added(struct slot *p_slot)
if (retval != -EEXIST)
goto err_exit;
}
pm_runtime_put(&ctrl->pcie->port->dev);
pciehp_green_led_on(p_slot);
pciehp_set_attention_status(p_slot, 0);
return 0;
err_exit:
pm_runtime_put(&ctrl->pcie->port->dev);
set_slot_off(ctrl, p_slot);
return retval;
}
@@ -141,9 +137,7 @@ static int remove_board(struct slot *p_slot)
int retval;
struct controller *ctrl = p_slot->ctrl;
pm_runtime_get_sync(&ctrl->pcie->port->dev);
retval = pciehp_unconfigure_device(p_slot);
pm_runtime_put(&ctrl->pcie->port->dev);
if (retval)
return retval;