diff options
| author |   Ben Dooks <ben-linux@fluff.org> | 2011-06-10 00:50:32 +0000 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2011-06-11 15:54:52 -0700 |
| commit | 40d15cd06e87722b1cc27d56c8274617580f2c56 (patch) | |
| tree | 0069ec0f16f41b0369d10c35616444c7c8d9d21f /drivers/net/dm9000.c | |
| parent | sctp: kzalloc() error handling on deleting last address (diff) | |
| download | linux-dev-40d15cd06e87722b1cc27d56c8274617580f2c56.tar.xz linux-dev-40d15cd06e87722b1cc27d56c8274617580f2c56.zip | |
net: DM9000: Add support for byte EEPROM access
Given many versions of ethtool's reluctance to do anything other than
byte accesses to the EEPROM interface, it is easier to update the driver
to support byte accesses so that all the ethtool versions that have been
observed in Debian can write the EEPROM.
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Reviewed-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/dm9000.c')
| -rw-r--r-- | drivers/net/dm9000.c | 26 |
1 files changed, 20 insertions, 6 deletions
diff --git a/drivers/net/dm9000.c b/drivers/net/dm9000.c index 863e9c459e65..8ef31dc4704d 100644 --- a/drivers/net/dm9000.c +++ b/drivers/net/dm9000.c @@ -535,21 +535,35 @@ static int dm9000_set_eeprom(struct net_device *dev, board_info_t *dm = to_dm9000_board(dev); int offset = ee->offset; int len = ee->len; - int i; + int done; /* EEPROM access is aligned to two bytes */ - if ((len & 1) != 0 || (offset & 1) != 0) - return -EINVAL; - if (dm->flags & DM9000_PLATF_NO_EEPROM) return -ENOENT; if (ee->magic != DM_EEPROM_MAGIC) return -EINVAL; - for (i = 0; i < len; i += 2) - dm9000_write_eeprom(dm, (offset + i) / 2, data + i); + while (len > 0) { + if (len & 1 || offset & 1) { + int which = offset & 1; + u8 tmp[2]; + + dm9000_read_eeprom(dm, offset / 2, tmp); + tmp[which] = *data; + dm9000_write_eeprom(dm, offset / 2, tmp); + + done = 1; + } else { + dm9000_write_eeprom(dm, offset / 2, data); + done = 2; + } + + data += done; + offset += done; + len -= done; + } return 0; } |