From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: To: From: Benjamin Herrenschmidt Date: Fri, 30 Nov 2007 16:40:30 +1100 Subject: [PATCH 7/11] ibm_newemac: Skip EMACs that are marked unused by the firmware In-Reply-To: <1196401223.5661.297518056501.qpush@grosgo> Message-Id: <20071130054133.8FE17DDE39@ozlabs.org> Cc: netdev@vger.kernel.org, linuxppc-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Hugh Blemings 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 --- drivers/net/ibm_newemac/core.c | 4 ++++ 1 file changed, 4 insertions(+) Index: linux-work/drivers/net/ibm_newemac/core.c =================================================================== --- linux-work.orig/drivers/net/ibm_newemac/core.c 2007-11-20 14:47:02.000000000 +1100 +++ linux-work/drivers/net/ibm_newemac/core.c 2007-11-20 14:47:05.000000000 +1100 @@ -2550,6 +2550,10 @@ static int __devinit emac_probe(struct o 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)