From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx1.redhat.com ([209.132.183.28]:17383 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753785Ab3GaDbq (ORCPT ); Tue, 30 Jul 2013 23:31:46 -0400 Subject: [RFC PATCH 2/7] pci: Add hotplug_slot_ops.reset_slot() To: linux-pci@vger.kernel.org From: Alex Williamson Cc: bhelgaas@google.com, indou.takao@jp.fujitsu.com Date: Tue, 30 Jul 2013 21:31:42 -0600 Message-ID: <20130731033141.31931.45258.stgit@bling.home> In-Reply-To: <20130731031316.31931.56751.stgit@bling.home> References: <20130731031316.31931.56751.stgit@bling.home> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Sender: linux-pci-owner@vger.kernel.org List-ID: This optional callback allows htoplug controllers to perform slot specific resets. These may be necessary in cases where a normal secondary bus reset can interact with controller logic and expose spurious hotplugs. Signed-off-by: Alex Williamson --- include/linux/pci_hotplug.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/include/linux/pci_hotplug.h b/include/linux/pci_hotplug.h index 8db71dc..bd32109 100644 --- a/include/linux/pci_hotplug.h +++ b/include/linux/pci_hotplug.h @@ -63,6 +63,9 @@ enum pcie_link_width { * @get_adapter_status: Called to get see if an adapter is present in the slot or not. * If this field is NULL, the value passed in the struct hotplug_slot_info * will be used when this value is requested by a user. + * @reset_slot: Optional interface to allow override of a bus reset for the + * slot for cases where a secondary bus reset can result in spurious + * hotplug events or where a slot can be reset independent of the bus. * * The table of function pointers that is passed to the hotplug pci core by a * hotplug pci driver. These functions are called by the hotplug pci core when @@ -80,6 +83,7 @@ struct hotplug_slot_ops { int (*get_attention_status) (struct hotplug_slot *slot, u8 *value); int (*get_latch_status) (struct hotplug_slot *slot, u8 *value); int (*get_adapter_status) (struct hotplug_slot *slot, u8 *value); + int (*reset_slot) (struct hotplug_slot *slot, int probe); }; /**