Commit 2069624d authored by Matthew Hagan's avatar Matthew Hagan Committed by Jakub Kicinski

net: sfp: Add tx-fault workaround for Huawei MA5671A SFP ONT

As noted elsewhere, various GPON SFP modules exhibit non-standard
TX-fault behaviour. In the tested case, the Huawei MA5671A, when used
in combination with a Marvell mv88e6085 switch, was found to
persistently assert TX-fault, resulting in the module being disabled.

This patch adds a quirk to ignore the SFP_F_TX_FAULT state, allowing the
module to function.

Change from v1: removal of erroneous return statment (Andrew Lunn)
Signed-off-by: default avatarMatthew Hagan <mnhagan88@gmail.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Link: https://lore.kernel.org/r/20220502223315.1973376-1-mnhagan88@gmail.comSigned-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3a58f13a
......@@ -250,6 +250,7 @@ struct sfp {
struct sfp_eeprom_id id;
unsigned int module_power_mW;
unsigned int module_t_start_up;
bool tx_fault_ignore;
#if IS_ENABLED(CONFIG_HWMON)
struct sfp_diag diag;
......@@ -1956,6 +1957,12 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report)
else
sfp->module_t_start_up = T_START_UP;
if (!memcmp(id.base.vendor_name, "HUAWEI ", 16) &&
!memcmp(id.base.vendor_pn, "MA5671A ", 16))
sfp->tx_fault_ignore = true;
else
sfp->tx_fault_ignore = false;
return 0;
}
......@@ -2409,7 +2416,10 @@ static void sfp_check_state(struct sfp *sfp)
mutex_lock(&sfp->st_mutex);
state = sfp_get_state(sfp);
changed = state ^ sfp->state;
changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT;
if (sfp->tx_fault_ignore)
changed &= SFP_F_PRESENT | SFP_F_LOS;
else
changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT;
for (i = 0; i < GPIO_MAX; i++)
if (changed & BIT(i))
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment