linux-kernel - Re: [PATCH 0/7] net: thunderx: implement DMAC filtering support

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Date:   Tue, 27 Mar 2018 13:28:22 -0400 (EDT)
From:   David Miller <davem@...emloft.net>
To:     Vadim.Lomovtsev@...iumnetworks.com
Cc:     sgoutham@...ium.com, sunil.kovvuri@...il.com,
        robert.richter@...nel.org, linux-arm-kernel@...ts.infradead.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        dnelson@...hat.com, Vadim.Lomovtsev@...ium.com
Subject: Re: [PATCH 0/7] net: thunderx: implement DMAC filtering support

From: Vadim Lomovtsev <Vadim.Lomovtsev@...iumnetworks.com>
Date: Tue, 27 Mar 2018 08:07:29 -0700

> From: Vadim Lomovtsev <Vadim.Lomovtsev@...ium.com>
> 
> By default CN88XX BGX accepts all incoming multicast and broadcast
> packets and filtering is disabled. The nic driver doesn't provide
> an ability to change such behaviour.
> 
> This series is to implement DMAC filtering management for CN88XX
> nic driver allowing user to enable/disable filtering and configure
> specific MAC addresses to filter traffic.

This doesn't even compile:

drivers/net/ethernet/cavium/thunder/thunder_bgx.c: In function ‘bgx_lmac_save_filter’:
drivers/net/ethernet/cavium/thunder/thunder_bgx.c:286:3: warning: ‘return’ with no value, in function returning non-void [-Wreturn-type]
   return;
   ^~~~~~
drivers/net/ethernet/cavium/thunder/thunder_bgx.c:281:12: note: declared here
 static int bgx_lmac_save_filter(struct lmac *lmac, u64 dmac, u8 vf_id)
            ^~~~~~~~~~~~~~~~~~~~
In file included from drivers/net/ethernet/cavium/thunder/nic.h:15:0,
                 from drivers/net/ethernet/cavium/thunder/thunder_bgx.c:21:
drivers/net/ethernet/cavium/thunder/thunder_bgx.c: In function ‘bgx_set_dmac_cam_filter_mac’:
drivers/net/ethernet/cavium/thunder/thunder_bgx.h:61:38: warning: left shift count >= width of type [-Wshift-count-overflow]
 #define  RX_DMACX_CAM_LMACID(x)   (x << 49)
                                      ^
drivers/net/ethernet/cavium/thunder/thunder_bgx.c:324:8: note: in expansion of macro ‘RX_DMACX_CAM_LMACID’
  cfg = RX_DMACX_CAM_LMACID(lmacid & LMAC_ID_MASK) |
        ^~~~~~~~~~~~~~~~~~~