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| author | Ivan Bornyakov <i.bornyakov@metrotek.ru> | 2023-04-06 16:08:33 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-04-09 16:01:28 +0100 |
| commit | bef227c1537cb8005311c0842bc5449e8c7a5973 (patch) | |
| tree | ab9b924053b727145b72e3d46401acee71c16496 /drivers/net/phy/sfp.c | |
| parent | 813c2dd78618f108fdcf9cd726ea90f081ee2881 (diff) | |
| download | linux-bef227c1537cb8005311c0842bc5449e8c7a5973.tar.gz linux-bef227c1537cb8005311c0842bc5449e8c7a5973.tar.bz2 linux-bef227c1537cb8005311c0842bc5449e8c7a5973.zip | |
net: sfp: avoid EEPROM read of absent SFP module
If SFP module is not present, it is sensible to fail sfp_module_eeprom()
and sfp_module_eeprom_by_page() early to avoid excessive I2C transfers
which are garanteed to fail.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy/sfp.c')
| -rw-r--r-- | drivers/net/phy/sfp.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 81edc457c5a1..bf345032d450 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -2487,6 +2487,9 @@ static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, unsigned int first, last, len; int ret; + if (!(sfp->state & SFP_F_PRESENT)) + return -ENODEV; + if (ee->len == 0) return -EINVAL; @@ -2519,6 +2522,9 @@ static int sfp_module_eeprom_by_page(struct sfp *sfp, const struct ethtool_module_eeprom *page, struct netlink_ext_ack *extack) { + if (!(sfp->state & SFP_F_PRESENT)) + return -ENODEV; + if (page->bank) { NL_SET_ERR_MSG(extack, "Banks not supported"); return -EOPNOTSUPP; |