AT&T DSL and Wireless Router : Require to connect one Machine on Ethernet for wireless to work?
1 I have AT&T DSL Internet connection. (Phone and Internet Service from AT&T)
2 Planning to have following Network at home.
DSL modem----Wireless Router -(WirelessLink)-Laptop
Will this setup work ?
Or
I have to have the Machine Connected to the DLINK Wireless router on its Ethernet Port so that Other Laptop on Wireless link will work?
Thanks in advance.

Additional Details

18 minutes ago
AT&T help desk told me that If I dont buy Modem+Wireless router built in to one device from AT&T costing $79.99 , instead buy another wireless router then I might have to have the One machine connected to the Wireless router, using Ethernet Port. so that computer connected over wireless can access the Internet... I was bit confused why so?
Thanks Jag, I was sure you dont have to have the machine connected to the Internet but wanted to confirm if any one has similar experience, however, have seen too many of such limitations in network devices so wanted to be sure, thanks a million for your help.