[PATCH] net: enetc: document enetc_msg_vsi_send() return values

[Dan Carpenter <error27@gmail.com>]

Smatch combines the return values together and wants all the callers
to handle the positive values so it leads to static checker warnings.
Add a comment explaining the return values.

Generally functions which return non-standard values should have a
comment.

Signed-off-by: Dan Carpenter <error27@gmail.com>
---
 drivers/net/ethernet/freescale/enetc/enetc_vf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/ethernet/freescale/enetc/enetc_vf.c b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
index ee9567998c7c..f70b6d4290f2 100644
--- a/drivers/net/ethernet/freescale/enetc/enetc_vf.c
+++ b/drivers/net/ethernet/freescale/enetc/enetc_vf.c
@@ -48,6 +48,10 @@ static void enetc_msg_dma_free(struct device *dev, struct enetc_msg_swbd *msg)
 	}
 }
 
+/*
+ * Returns: 0 on success, a negative errno on failure, or the positive IP
+ * minor revision for an ENETC_MSG_GET_IP_MN request.
+ */
 static int enetc_msg_vsi_send(struct enetc_si *si, struct enetc_msg_swbd *msg)
 {
 	struct device *dev = &si->pdev->dev;
-- 
2.53.0