On 12/06/2017 16:48, Mao Zhongyi wrote:
Comments for pci_add_capability2() to explain the return
value. This may help to make a correct return value check
for its callers.

Cc: m...@redhat.com
Cc: mar...@redhat.com
Cc: arm...@redhat.com
Suggested-by: Markus Armbruster <arm...@redhat.com>
Signed-off-by: Mao Zhongyi <maozy.f...@cn.fujitsu.com>
---
  hw/pci/pci.c | 6 ++++++
  1 file changed, 6 insertions(+)

diff --git a/hw/pci/pci.c b/hw/pci/pci.c
index 53566b8..b73bfea 100644
--- a/hw/pci/pci.c
+++ b/hw/pci/pci.c
@@ -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)


Reviewed-by: Marcel Apfelbaum <mar...@redhat.com>

Thanks,
Marcel

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