[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <1347678312-11124-4-git-send-email-jiang.liu@huawei.com>
Date: Sat, 15 Sep 2012 11:05:06 +0800
From: Jiang Liu <liuj97@...il.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Tony Luck <tony.luck@...el.com>,
Yijing Wang <wangyijing@...wei.com>,
Yinghai Lu <yinghai@...nel.org>,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>,
Jiang Liu <liuj97@...il.com>, linux-kernel@...r.kernel.org,
linux-pci@...r.kernel.org, Jiang Liu <jiang.liu@...wei.com>
Subject: [PATCH v2 3/9] PCI: preserve dev->subordinate until pci_stop_dev() has been called
From: Yijing Wang <wangyijing@...wei.com>
Changeset 2ed168eeb3edec029aa0eca5cb981d6376f931f9 "PCI: Fold stop and
remove helpers into their callers" has changed the behavior when
removing a PCI device.
Previously, for a PCI bridge device with secondary bus, dev->subordinate
is valid when calling PCI bus notification callbacks for
BUS_NOTIFY_ADD_DEVICE/BUS_NOTIFY_DEL_DEVICE events. Now dev->subordinate
has been reset to NULL when calling callbacks for BUS_NOTIFY_DEL_DEVICE
events, which may break some PCI bus notification callbacks.
So revert to the original behavior to keep dev->subordinate valid for
both BUS_NOTIFY_ADD_DEVICE events and BUS_NOTIFY_DEL_DEVICE events.
Signed-off-by: Yijing Wang <wangyijing@...wei.com>
Signed-off-by: Jiang Liu <jiang.liu@...wei.com>
---
drivers/pci/remove.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/pci/remove.c b/drivers/pci/remove.c
index 86a4636..6244956 100644
--- a/drivers/pci/remove.c
+++ b/drivers/pci/remove.c
@@ -79,16 +79,16 @@ void pci_stop_and_remove_bus_device(struct pci_dev *dev)
* iterator. Therefore, iterate in reverse so we remove the VFs
* first, then the PF.
*/
- if (bus) {
+ if (bus)
list_for_each_entry_safe_reverse(child, tmp,
&bus->devices, bus_list)
pci_stop_and_remove_bus_device(child);
+ pci_stop_dev(dev);
+ if (bus) {
pci_remove_bus(bus);
dev->subordinate = NULL;
}
-
- pci_stop_dev(dev);
pci_destroy_dev(dev);
}
EXPORT_SYMBOL(pci_stop_and_remove_bus_device);
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists