diff options
| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-12-15 16:09:41 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-12-18 14:57:48 -0500 |
| commit | 2794ffc441dde3109804085dc745e8014a4de224 (patch) | |
| tree | d80d005d64cb8214246c3940695a77628e3f4eb5 /drivers | |
| parent | 20b56ed9f8adfb9a7fb1c878878c54aa4ed645c1 (diff) | |
| download | linux-2794ffc441dde3109804085dc745e8014a4de224.tar.bz2 | |
sfp: fix EEPROM reading in the case of non-SFF8472 SFPs
The EEPROM reading was trying to read from the second EEPROM address
if we requested the last byte from the SFF8079 EEPROM, which caused a
failure when the second EEPROM is not present. Discovered with a
S-RJ01 SFP module. Fix this.
Fixes: 73970055450e ("sfp: add SFP module support")
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/phy/sfp.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 1a958c7b912d..ee6b2e041171 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -724,20 +724,19 @@ static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); len -= first; - ret = sfp->read(sfp, false, first, data, len); + ret = sfp_read(sfp, false, first, data, len); if (ret < 0) return ret; first += len; data += len; } - if (first >= ETH_MODULE_SFF_8079_LEN && - first < ETH_MODULE_SFF_8472_LEN) { + if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); len -= first; first -= ETH_MODULE_SFF_8079_LEN; - ret = sfp->read(sfp, true, first, data, len); + ret = sfp_read(sfp, true, first, data, len); if (ret < 0) return ret; } |