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xen/pciback: Check if the device is found instead of blindly assuming so. 

Just in case it is not found, don't try to dereference it.

[v1: Added WARN_ON, suggested by Jan Beulich <JBeulich@suse.com>]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2011-09-29 13:12:43 -04:00
parent 72bf809a19
commit 4645bf3067
1 changed files with 2 additions and 0 deletions
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2
drivers/xen/xen-pciback/pci_stub.c
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@ -220,6 +220,8 @@ void pcistub_put_pci_dev(struct pci_dev *dev)
}
spin_unlock_irqrestore(&pcistub_devices_lock, flags);
if (WARN_ON(!found_psdev))
return;
/*hold this lock for avoiding breaking link between
* pcistub and xen_pcibk when AER is in processing