[SLOF] [PATCH slof v2 3/4] ethernet: Fix gcc warnings

[Alexey Kardashevskiy]

This fixes gcc warnings but unlike other places, this does not change
the type of bytes_received as recv() may return a negative value;
instead this adds:
1) casting to size_t when comparing the size;
2) an additional check for a negative value returned from recv().

Signed-off-by: Alexey Kardashevskiy <aik at ozlabs.ru>
---
 clients/net-snk/app/netlib/ethernet.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/clients/net-snk/app/netlib/ethernet.c b/clients/net-snk/app/netlib/ethernet.c
index b73239e..6ff7355 100644
--- a/clients/net-snk/app/netlib/ethernet.c
+++ b/clients/net-snk/app/netlib/ethernet.c
@@ -117,7 +117,10 @@ int32_t receive_ether(int fd)
 	if (!bytes_received) // No messages
 		return 0;
 
-	if (bytes_received < sizeof(struct ethhdr))
+	if (bytes_received < 0)
+		return -1; /* recv() failed */
+
+	if ((size_t) bytes_received < sizeof(struct ethhdr))
 		return -1; // packet is too small
 
 	ethh = (struct ethhdr *) ether_packet;
-- 
2.5.0.rc3