cassini: Use local-mac-address prom property for Cassini MAC address

Fallback on the local-mac-address prom property if the Cassini device
does not have an address programmed in the VPD ROM. This uses the same
technique as implemented by the sungem driver.

The problem was reported by Frans van Berckel using Debian kernel 2.6.34-7
on Sun Fire V440. udev was assigning a new eth<n> device name on each reboot
because the cassini driver was using a random MAC address.

Fix tested on 2.6.34-7 and 2.6.37 Sun Fire V440. Compile tested against
2.6.36 davem/sparc-2.6.git

Reported-by: Frans van Berckel <fberckel@xs4all.nl>
Tested-by: Frans van Berckel <fberckel@xs4all.nl>
Reviewed-by: Julian Calaby <julian.calaby@gmail.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Richard Mortimer <richm@oldelvet.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/cassini.c b/drivers/net/cassini.c
index 73502fef876928dc147a95b9655c8ae4d0dc4099..7206ab2cbbf8e16526775de5ec4d2f9bb5789f60 100644 (file)
--- a/drivers/net/cassini.c
+++ b/drivers/net/cassini.c
@@ -3203,6 +3203,10 @@ static int cas_get_vpd_info(struct cas *cp, unsigned char *dev_addr,
        int phy_type = CAS_PHY_MII_MDIO0; /* default phy type */
        int mac_off  = 0;
 
+#if defined(CONFIG_OF)
+       const unsigned char *addr;
+#endif
+
        /* give us access to the PROM */
        writel(BIM_LOCAL_DEV_PROM | BIM_LOCAL_DEV_PAD,
               cp->regs + REG_BIM_LOCAL_DEV_EN);
@@ -3350,6 +3354,14 @@ use_random_mac_addr:
        if (found & VPD_FOUND_MAC)
                goto done;
 
+#if defined(CONFIG_OF)
+       addr = of_get_property(cp->of_node, "local-mac-address", NULL);
+       if (addr != NULL) {
+               memcpy(dev_addr, addr, 6);
+               goto done;
+       }
+#endif
+
        /* Sun MAC prefix then 3 random bytes. */
        pr_info("MAC address not found in ROM VPD\n");
        dev_addr[0] = 0x08;
@@ -5019,6 +5031,10 @@ static int __devinit cas_init_one(struct pci_dev *pdev,
        cp->msg_enable = (cassini_debug < 0) ? CAS_DEF_MSG_ENABLE :
          cassini_debug;
 
+#if defined(CONFIG_OF)
+       cp->of_node = pci_device_to_OF_node(pdev);
+#endif
+
        cp->link_transition = LINK_TRANSITION_UNKNOWN;
        cp->link_transition_jiffies_valid = 0;
 

diff --git a/drivers/net/cassini.h b/drivers/net/cassini.h
index dbc47878d83bf250970f70d0afb6afde6839deb3..faf4746a0f3ebfeb2d904689fcbbd9780484765b 100644 (file)
--- a/drivers/net/cassini.h
+++ b/drivers/net/cassini.h
@@ -2868,6 +2868,9 @@ struct cas {
        dma_addr_t block_dvma, tx_tiny_dvma[N_TX_RINGS];
        struct pci_dev *pdev;
        struct net_device *dev;
+#if defined(CONFIG_OF)
+       struct device_node      *of_node;
+#endif
 
        /* Firmware Info */
        u16                     fw_load_addr;