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xen/pciback: Document the entry points for 'pcistub_put_pci_dev'

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which are quite a few. It should be evident that dealing with that
many options is a bit complex.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2014-04-22 10:48:17 -04:00
parent 24d8bf1b0a
commit 0a9fd01529
1 changed files with 9 additions and 0 deletions
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9
drivers/xen/xen-pciback/pci_stub.c
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@ -242,6 +242,15 @@ struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev,
return found_dev; return found_dev;
} }
/*
* Called when:
* - XenBus state has been reconfigure (pci unplug). See xen_pcibk_remove_device
* - XenBus state has been disconnected (guest shutdown). See xen_pcibk_xenbus_remove
* - 'echo BDF > unbind' on pciback module with no guest attached. See pcistub_remove
* - 'echo BDF > unbind' with a guest still using it. See pcistub_remove
*
* As such we have to be careful.
*/
void pcistub_put_pci_dev(struct pci_dev *dev) void pcistub_put_pci_dev(struct pci_dev *dev)
{ {
struct pcistub_device *psdev, *found_psdev = NULL; struct pcistub_device *psdev, *found_psdev = NULL;