Re: [PATCH net 0/3] nfp: wait more carefully for card init

From: Jakub Kicinski <redacted>
Date: Wed, 13 Sep 2017 08:51:28 -0700

The first patch is a small fix for flower offload, we need a whitelist
of supported matches, otherwise the unsupported ones will be ignored.

The second and the third patch are adding wait/polling to the probe path.
We had reports of driver failing probe because it couldn't find the 
control process (NSP) on the card.  Turns out the NSP will only announce
its existence after it's fully initialized.  Until now we assumed it 
will be reachable, just not processing commands (hence we wait for
a NOOP command to execute successfully).

Please build test your changes and look at what the compiler says:

drivers/net/ethernet/netronome/nfp/nfp_main.c: In function ‘nfp_fw_unload’:
drivers/net/ethernet/netronome/nfp/nfp_main.c:395:10: warning: ‘return’ with a value, in function returning void
   return err;
          ^~~
drivers/net/ethernet/netronome/nfp/nfp_main.c:388:13: note: declared here
 static void nfp_fw_unload(struct nfp_pf *pf)
             ^~~~~~~~~~~~~