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pci: Add comment for pci_add_capability2()

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Comments for pci_add_capability2() to explain the return
value. This may help to make a correct return value check
for its callers.

Cc: mst@redhat.com
Cc: marcel@redhat.com
Cc: armbru@redhat.com
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
Reviewed-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Mao Zhongyi 2017-06-27 14:16:48 +08:00 committed by Michael S. Tsirkin
parent 673b0d7ccc
commit eacbc63211
1 changed files with 6 additions and 0 deletions
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6
hw/pci/pci.c
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@ -2276,6 +2276,12 @@ int pci_add_capability(PCIDevice *pdev, uint8_t cap_id,
return ret;
}
/*
* On success, pci_add_capability2() returns a positive value
* that the offset of the pci capability.
* On failure, it sets an error and returns a negative error
* code.
*/
int pci_add_capability2(PCIDevice *pdev, uint8_t cap_id,
uint8_t offset, uint8_t size,
Error **errp)