PCI: hotplug: pciehp: wait for 1 second after power off slot
According to the specification, we must wait for at least 1 second
after turning power off before taking any action that relies on power
having been removed from the slot/adapter.
Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/pci/hotplug/pciehp_ctrl.c b/drivers/pci/hotplug/pciehp_ctrl.c
index 7f22caa..98e541ffe 100644
--- a/drivers/pci/hotplug/pciehp_ctrl.c
+++ b/drivers/pci/hotplug/pciehp_ctrl.c
@@ -197,6 +197,12 @@
__FUNCTION__);
return;
}
+ /*
+ * After turning power off, we must wait for at least
+ * 1 second before taking any action that relies on
+ * power having been removed from the slot/adapter.
+ */
+ msleep(1000);
}
}
@@ -615,6 +621,12 @@
mutex_unlock(&p_slot->ctrl->crit_sect);
return -EINVAL;
}
+ /*
+ * After turning power off, we must wait for at least
+ * 1 second before taking any action that relies on
+ * power having been removed from the slot/adapter.
+ */
+ msleep(1000);
}
ret = remove_board(p_slot);
