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| author | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-03-05 13:14:19 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-03-20 13:04:57 -0700 |
| commit | 40e0c1e9b65e94462498ead4a63b1ee08fa40d42 (patch) | |
| tree | ef5ecf1e689db161578d4ec3af4ce78e72878243 | |
| parent | 990942383df7d1c11471621a7fe25067cc270dd0 (diff) | |
| download | linux-3.10-40e0c1e9b65e94462498ead4a63b1ee08fa40d42.tar.gz linux-3.10-40e0c1e9b65e94462498ead4a63b1ee08fa40d42.tar.bz2 linux-3.10-40e0c1e9b65e94462498ead4a63b1ee08fa40d42.zip | |
xen/pciback: Don't disable a PCI device that is already disabled.
commit bdc5c1812cea6efe1aaefb3131fcba28cd0b2b68 upstream.
While shuting down a HVM guest with pci devices passed through we
get this:
pciback 0000:04:00.0: restoring config space at offset 0x4 (was 0x100000, writing 0x100002)
------------[ cut here ]------------
WARNING: at drivers/pci/pci.c:1397 pci_disable_device+0x88/0xa0()
Hardware name: MS-7640
Device pciback
disabling already-disabled device
Modules linked in:
Pid: 53, comm: xenwatch Not tainted 3.9.0-rc1-20130304a+ #1
Call Trace:
[<ffffffff8106994a>] warn_slowpath_common+0x7a/0xc0
[<ffffffff81069a31>] warn_slowpath_fmt+0x41/0x50
[<ffffffff813cf288>] pci_disable_device+0x88/0xa0
[<ffffffff814554a7>] xen_pcibk_reset_device+0x37/0xd0
[<ffffffff81454b6f>] ? pcistub_put_pci_dev+0x6f/0x120
[<ffffffff81454b8d>] pcistub_put_pci_dev+0x8d/0x120
[<ffffffff814582a9>] __xen_pcibk_release_devices+0x59/0xa0
This fixes the bug.
Reported-and-Tested-by: Sander Eikelenboom <linux@eikelenboom.it>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/xen/xen-pciback/pciback_ops.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/xen/xen-pciback/pciback_ops.c b/drivers/xen/xen-pciback/pciback_ops.c index 97f5d264c31..b6df20ab673 100644 --- a/drivers/xen/xen-pciback/pciback_ops.c +++ b/drivers/xen/xen-pciback/pciback_ops.c @@ -113,7 +113,8 @@ void xen_pcibk_reset_device(struct pci_dev *dev) if (dev->msi_enabled) pci_disable_msi(dev); #endif - pci_disable_device(dev); + if (pci_is_enabled(dev)) + pci_disable_device(dev); pci_write_config_word(dev, PCI_COMMAND, 0); |