From 3d722562d734834282bccd97e0badd213ec311e9 Mon Sep 17 00:00:00 2001 From: Hugh Blemings Date: Wed, 5 Dec 2007 11:14:30 +1100 Subject: [PATCH] ibm_newemac: Skip EMACs that are marked unused by the firmware Depending on how the 44x processors are wired, some EMAC cells might not be useable (and not connected to a PHY). However, some device-trees may choose to still expose them (since their registers are present in the MMIO space) but with an "unused" property in them. Signed-off-by: Hugh Blemings Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Jeff Garzik --- drivers/net/ibm_newemac/core.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c index ac9fd46..a77207f 100644 --- a/drivers/net/ibm_newemac/core.c +++ b/drivers/net/ibm_newemac/core.c @@ -2550,6 +2550,10 @@ static int __devinit emac_probe(struct of_device *ofdev, struct device_node **blist = NULL; int err, i; + /* Skip unused/unwired EMACS */ + if (of_get_property(np, "unused", NULL)) + return -ENODEV; + /* Find ourselves in the bootlist if we are there */ for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) if (emac_boot_list[i] == np) -- 2.7.4