RE: [patch net v2] net: fec: fix compile with CONFIG_M5272

From: Nikita Yushchenko <nikita.yoush@cogentembedded.com> Sent: Monday, December 05, 2016 4:16 PM
 >To: David S. Miller [off-list ref]; Andy Duan
 >[off-list ref]; Troy Kisky [off-list ref];
 >Andrew Lunn [off-list ref]; Eric Nelson [off-list ref]; Philippe
 >Reynes [off-list ref]; Johannes Berg [off-list ref];
 >netdev@vger.kernel.org
 >Cc: Chris Healy [off-list ref]; Fabio Estevam
 >[off-list ref]; linux-kernel@vger.kernel.org; Nikita
 >Yushchenko [off-list ref]
 >Subject: [patch net v2] net: fec: fix compile with CONFIG_M5272
 >
 >Commit 4dfb80d18d05 ("net: fec: cache statistics while device is down")
 >introduced unconditional statistics-related actions.
 >
 >However, when driver is compiled with CONFIG_M5272, staticsics-related
 >definitions do not exist, which results into build errors.
 >
 >Fix that by adding explicit handling of !defined(CONFIG_M5272) case.
 >
 >Fixes: 4dfb80d18d05 ("net: fec: cache statistics while device is down")
 >Signed-off-by: Nikita Yushchenko [off-list ref]
 >---
 >Changes since v1:
 >- instead of #ifdef'ing calls to fec_enet_update_ethtool_stats(), add
 >  definition of empty fec_enet_update_ethtool_stats() for CONFIG_M5272
 >  case,
 >- add FEC_STATS_SIZE macro to avoid #ifdef in the middle of
 >  alloc_etherdev_mqs() args.
 >
 > drivers/net/ethernet/freescale/fec_main.c | 13 ++++++++++---
 > 1 file changed, 10 insertions(+), 3 deletions(-)
 >
Acked-by: Fugang Duan <redacted>

 >diff --git a/drivers/net/ethernet/freescale/fec_main.c
 >b/drivers/net/ethernet/freescale/fec_main.c
 >index 5f77caa59534..741cf4a57bfc 100644
 >--- a/drivers/net/ethernet/freescale/fec_main.c
 >+++ b/drivers/net/ethernet/freescale/fec_main.c
 >@@ -2313,6 +2313,8 @@ static const struct fec_stat {
 > 	{ "IEEE_rx_octets_ok", IEEE_R_OCTETS_OK },  };
 >
 >+#define FEC_STATS_SIZE		(ARRAY_SIZE(fec_stats) * sizeof(u64))
 >+
 > static void fec_enet_update_ethtool_stats(struct net_device *dev)  {
 > 	struct fec_enet_private *fep = netdev_priv(dev); @@ -2330,7
 >+2332,7 @@ static void fec_enet_get_ethtool_stats(struct net_device *dev,
 > 	if (netif_running(dev))
 > 		fec_enet_update_ethtool_stats(dev);
 >
 >-	memcpy(data, fep->ethtool_stats, ARRAY_SIZE(fec_stats) *
 >sizeof(u64));
 >+	memcpy(data, fep->ethtool_stats, FEC_STATS_SIZE);
 > }
 >
 > static void fec_enet_get_strings(struct net_device *netdev, @@ -2355,6
 >+2357,12 @@ static int fec_enet_get_sset_count(struct net_device *dev, int
 >sset)
 > 		return -EOPNOTSUPP;
 > 	}
 > }
 >+
 >+#else	/* !defined(CONFIG_M5272) */
 >+#define FEC_STATS_SIZE	0
 >+static inline void fec_enet_update_ethtool_stats(struct net_device
 >+*dev) { }
 > #endif /* !defined(CONFIG_M5272) */
 >
 > static int fec_enet_nway_reset(struct net_device *dev) @@ -3293,8
 >+3301,7 @@ fec_probe(struct platform_device *pdev)
 >
 > 	/* Init network device */
 > 	ndev = alloc_etherdev_mqs(sizeof(struct fec_enet_private) +
 >-				  ARRAY_SIZE(fec_stats) * sizeof(u64),
 >-				  num_tx_qs, num_rx_qs);
 >+				  FEC_STAT_SIZE, num_tx_qs, num_rx_qs);
 > 	if (!ndev)
 > 		return -ENOMEM;
 >
 >--
 >2.1.4