[RFC PATCH] bgmac: Fix build error seen if BCM47XX is not configured

[Guenter Roeck <linux@roeck-us.net>]

arm:allmodconfig fails to build as follows since ARCH_BCM_5301X
is configured but not BCM47XX.

drivers/net/ethernet/broadcom/bgmac.c: In function 'bgmac_probe':
drivers/net/ethernet/broadcom/bgmac.c:1643:2: error:
		implicit declaration of function 'bcm47xx_nvram_getenv'

Fixes: fc300dc3733f ("bgmac: allow enabling on ARCH_BCM_5301X")
Cc: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
Seen in today's upstream kernel.

I don't like this fix too much (I think it is quite kludgy),
so I marked it RFC (and please don't beat the messenger ;-).

 drivers/net/ethernet/broadcom/bgmac.c | 17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bgmac.c b/drivers/net/ethernet/broadcom/bgmac.c
index 5cb93d1f50a4..dcf27a7c1836 100644
--- a/drivers/net/ethernet/broadcom/bgmac.c
+++ b/drivers/net/ethernet/broadcom/bgmac.c
@@ -17,8 +17,21 @@
 #include <linux/phy_fixed.h>
 #include <linux/interrupt.h>
 #include <linux/dma-mapping.h>
+
+#ifdef CONFIG_BCM47XX
 #include <bcm47xx_nvram.h>
 
+static int __bcm47xx_nvram_getenv(const char *name, char *val, size_t len)
+{
+	return bcm47xx_nvram_getenv(name, val, len);
+}
+#else
+static int __bcm47xx_nvram_getenv(const char *name, char *val, size_t len)
+{
+	return -ENOENT;
+}
+#endif
+
 static const struct bcma_device_id bgmac_bcma_tbl[] = {
 	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_4706_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS),
 	BCMA_CORE(BCMA_MANUF_BCM, BCMA_CORE_MAC_GBIT, BCMA_ANY_REV, BCMA_ANY_CLASS),
@@ -1070,7 +1083,7 @@ static void bgmac_chip_reset(struct bgmac *bgmac)
 			     BGMAC_CHIPCTL_1_IF_TYPE_MII;
 		char buf[4];
 
-		if (bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
+		if (__bcm47xx_nvram_getenv("et_swtype", buf, sizeof(buf)) > 0) {
 			if (kstrtou8(buf, 0, &et_swtype))
 				bgmac_err(bgmac, "Failed to parse et_swtype (%s)\n",
 					  buf);
@@ -1635,7 +1648,7 @@ static int bgmac_probe(struct bcma_device *core)
 	}
 
 	bgmac->int_mask = BGMAC_IS_ERRMASK | BGMAC_IS_RX | BGMAC_IS_TX_MASK;
-	if (bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
+	if (__bcm47xx_nvram_getenv("et0_no_txint", NULL, 0) == 0)
 		bgmac->int_mask &= ~BGMAC_IS_TX_MASK;
 
 	/* TODO: reset the external phy. Specs are needed */
-- 
2.1.0