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| author | Michael Buesch <mb@bu3sch.de> | 2008-03-25 18:04:46 +0100 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2008-03-25 23:42:07 -0400 |
| commit | 5ea79631c0c47d28831a0635e8af9da539d449cd (patch) | |
| tree | 3d653580fd3a52c600c0f7b02c45236b76a5ce24 /drivers/net/b44.c | |
| parent | 6ef2977d414cc196baba0fb53509c5f8cd9154b4 (diff) | |
| download | linux-3.10-5ea79631c0c47d28831a0635e8af9da539d449cd.tar.gz linux-3.10-5ea79631c0c47d28831a0635e8af9da539d449cd.tar.bz2 linux-3.10-5ea79631c0c47d28831a0635e8af9da539d449cd.zip | |
b44: Truncate PHY address
Some ROMs on embedded devices store incorrect values for
the PHY address of the ethernet device.
It looks like the number is sign-extended.
Truncate the value by applying the PHY-address mask to it.
The patch was tested on a bcm47xx embedded system (where the bug
triggers) and a bcm4400 PCI card.
Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/b44.c')
| -rw-r--r-- | drivers/net/b44.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/net/b44.c b/drivers/net/b44.c index ea2a2b548e3..25f1337cd02 100644 --- a/drivers/net/b44.c +++ b/drivers/net/b44.c @@ -2082,6 +2082,11 @@ static int __devinit b44_get_invariants(struct b44 *bp) addr = sdev->bus->sprom.et0mac; bp->phy_addr = sdev->bus->sprom.et0phyaddr; } + /* Some ROMs have buggy PHY addresses with the high + * bits set (sign extension?). Truncate them to a + * valid PHY address. */ + bp->phy_addr &= 0x1F; + memcpy(bp->dev->dev_addr, addr, 6); if (!is_valid_ether_addr(&bp->dev->dev_addr[0])){ |