staging/rdma/hfi1: diag.c correct sizeof parameter

sizeof should use the variable rather than the struct definition to ensure that
type changes are properly accounted for.
Signed-off-by: NIra Weiny <ira.weiny@intel.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rdma/hfi1/diag.c

@@ -1482,7 +1482,7 @@ static struct snoop_packet *allocate_snoop_packet(u32 hdr_len,
 {
 	struct snoop_packet *packet;
 
-	packet = kzalloc(sizeof(struct snoop_packet) + hdr_len + data_len
+	packet = kzalloc(sizeof(*packet) + hdr_len + data_len
 			 + md_len,
 			 GFP_ATOMIC | __GFP_NOWARN);
 	if (likely(packet))