Patch "PCI: Fix refcount issue in pci_create_root_bus() error recovery path" has been added to the 3.9-stable tree

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This is a note to let you know that I've just added the patch titled

    PCI: Fix refcount issue in pci_create_root_bus() error recovery path

to the 3.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     pci-fix-refcount-issue-in-pci_create_root_bus-error-recovery-path.patch
and it can be found in the queue-3.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 343df771e671d821478dd3ef525a0610b808dbf8 Mon Sep 17 00:00:00 2001
From: Jiang Liu <liuj97@xxxxxxxxx>
Date: Fri, 7 Jun 2013 01:10:08 +0800
Subject: PCI: Fix refcount issue in pci_create_root_bus() error recovery path

From: Jiang Liu <liuj97@xxxxxxxxx>

commit 343df771e671d821478dd3ef525a0610b808dbf8 upstream.

After calling device_register(&bridge->dev), the bridge is reference-
counted, and it is illegal to call kfree() on it except in the release
function.

[bhelgaas: changelog, use put_device() after device_register() failure]
Signed-off-by: Jiang Liu <jiang.liu@xxxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/pci/probe.c |   14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1694,12 +1694,16 @@ struct pci_bus *pci_create_root_bus(stru
 	bridge->dev.release = pci_release_bus_bridge_dev;
 	dev_set_name(&bridge->dev, "pci%04x:%02x", pci_domain_nr(b), bus);
 	error = pcibios_root_bridge_prepare(bridge);
-	if (error)
-		goto bridge_dev_reg_err;
+	if (error) {
+		kfree(bridge);
+		goto err_out;
+	}
 
 	error = device_register(&bridge->dev);
-	if (error)
-		goto bridge_dev_reg_err;
+	if (error) {
+		put_device(&bridge->dev);
+		goto err_out;
+	}
 	b->bridge = get_device(&bridge->dev);
 	device_enable_async_suspend(b->bridge);
 	pci_set_bus_of_node(b);
@@ -1753,8 +1757,6 @@ struct pci_bus *pci_create_root_bus(stru
 class_dev_reg_err:
 	put_device(&bridge->dev);
 	device_unregister(&bridge->dev);
-bridge_dev_reg_err:
-	kfree(bridge);
 err_out:
 	kfree(b);
 	return NULL;


Patches currently in stable-queue which might be from liuj97@xxxxxxxxx are

queue-3.9/pci-fix-refcount-issue-in-pci_create_root_bus-error-recovery-path.patch
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