Re: [PATCH 03/11] cirrus/mac89x0: print MAC via printk format specifier

On Sat, Feb 25, 2012 at 11:15, Geert Uytterhoeven [off-list ref] wrote:

On Fri, Feb 24, 2012 at 14:45, Danny Kukawka [off-list ref] wrote:

quoted

Print MAC/dev_addr via printk extended format specifier %pM instead
of custom code.

Use memcpy to set the address to dev->dev_addr in set_mac_address,
instead of mxing it up in a for loop with printing a debug msg.

Check also if the given address is valid.

Why do you sneak in this check in this patch?

And it doesn't compile:

http://kisskb.ellerman.id.au/kisskb/buildresult/5752157/

drivers/net/ethernet/cirrus/mac89x0.c: In function ‘set_mac_address’:
drivers/net/ethernet/cirrus/mac89x0.c:597: warning: dereferencing
‘void *’ pointer
drivers/net/ethernet/cirrus/mac89x0.c:597: error: request for member
‘sa_data’ in something not a structure or union
drivers/net/ethernet/cirrus/mac89x0.c:600: warning: dereferencing
‘void *’ pointer
drivers/net/ethernet/cirrus/mac89x0.c:600: error: request for member
‘sa_data’ in something not a structure or union
drivers/net/ethernet/cirrus/mac89x0.c:595: warning: unused variable ‘saddr’

No patch included as I don't think this should have been applied as-is.

quoted

Signed-off-by: Danny Kukawka <redacted>
---
 drivers/net/ethernet/cirrus/mac89x0.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/cirrus/mac89x0.c b/drivers/net/ethernet/cirrus/mac89x0.c
index 83781f3..a7324ce 100644
--- a/drivers/net/ethernet/cirrus/mac89x0.c
+++ b/drivers/net/ethernet/cirrus/mac89x0.c

@@ -592,10 +592,14 @@ static void set_multicast_list(struct net_device *dev)

 static int set_mac_address(struct net_device *dev, void *addr)
 {
       int i;
-       printk("%s: Setting MAC address to ", dev->name);
-       for (i = 0; i < 6; i++)
-               printk(" %2.2x", dev->dev_addr[i] = ((unsigned char *)addr)[i]);
-       printk(".\n");
+       struct sockaddr *saddr = addr;
+
+       if (!is_valid_ether_addr(addr->sa_data))
+               return -EADDRNOTAVAIL;
+
+       memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN);
+       printk("%s: Setting MAC address to %pM\n", dev->name, dev->dev_addr);
+
       /* set the Ethernet address */
       for (i=0; i < ETH_ALEN/2; i++)
               writereg(dev, PP_IA+i*2, dev->dev_addr[i*2] | (dev->dev_addr[i*2+1] << 8));

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds