linux-kernel - Re: [PATCH v2] net: fec: Fix build for MCF5272

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Message-ID: <20130618163232.GA10097@roeck-us.net>
Date:	Tue, 18 Jun 2013 09:32:32 -0700
From:	Guenter Roeck <linux@...ck-us.net>
To:	Fabio Estevam <festevam@...il.com>
Cc:	netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>,
	linux-kernel@...r.kernel.org, Frank Li <Frank.Li@...escale.com>,
	Jim Baxter <jim_baxter@...tor.com>
Subject: Re: [PATCH v2] net: fec: Fix build for MCF5272

On Tue, Jun 18, 2013 at 01:23:13PM -0300, Fabio Estevam wrote:
> On Tue, Jun 18, 2013 at 12:38 PM, Guenter Roeck <linux@...ck-us.net> wrote:
> > Commits 4c09eed9 (net: fec: Enable imx6 enet checksum acceleration) and
> > baa70a5c (net: fec: enable pause frame to improve rx prefomance for 1G
> > network) introduced functionality into the FEC driver which is not
> > supported on MCF5272. The registers used to implement this functionality
> > do not exist on MCF5272. Since register defines for MCF5272 are separate
> > from register defines for other chips, building images for MCF5272 fails,
> > complaining about several undefined symbols.
> >
> > Adding the missing register defines is not an option, since the registers
> > do not exist on MCF5272. Disable the added functionality for MCF5272 builds.
> 
> Can you please show the build error message you got?
> 
> Also, it would be nice if FEC could be enabled by default on some m68k
> defconfig, so that we could spot issues like this earlier.
> 
Try building m5272c3_defconfig; this is actually how I found the problem when
test-building v3.9.6-rc1.

make ARCH=m68k CROSS_COMPILE=m68k-linux-gnu- mrproper
make ARCH=m68k CROSS_COMPILE=m68k-linux-gnu- m5272c3_defconfig
make ARCH=m68k CROSS_COMPILE=m68k-linux-gnu-

results in:

drivers/net/ethernet/freescale/fec_main.c: In function ‘fec_restart’:
drivers/net/ethernet/freescale/fec_main.c:520:8: error: ‘FEC_RACC’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec_main.c:520:8: note: each undeclared identifier is reported only once for each function it appears in
drivers/net/ethernet/freescale/fec_main.c:585:3: error: ‘FEC_R_FIFO_RSEM’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec_main.c:586:3: error: ‘FEC_R_FIFO_RSFL’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec_main.c:587:3: error: ‘FEC_R_FIFO_RAEM’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec_main.c:588:3: error: ‘FEC_R_FIFO_RAFL’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec_main.c:591:3: error: ‘FEC_OPD’ undeclared (first use in this function)

with v3.10-rc6,

and

drivers/net/ethernet/freescale/fec.c: In function ‘fec_restart’:
drivers/net/ethernet/freescale/fec.c:530:3: error: ‘FEC_R_FIFO_RSEM’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec.c:530:3: note: each undeclared identifier is reported only once for each function it appears in
drivers/net/ethernet/freescale/fec.c:531:3: error: ‘FEC_R_FIFO_RSFL’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec.c:532:3: error: ‘FEC_R_FIFO_RAEM’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec.c:533:3: error: ‘FEC_R_FIFO_RAFL’ undeclared (first use in this function)
drivers/net/ethernet/freescale/fec.c:536:3: error: ‘FEC_OPD’ undeclared (first use in this function)

with 3.9.6.
 
Want me to add it to the commit log ?

Guenter
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