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Date: Sat, 30 Apr 2022 13:48:02 +0100 From: Matthew Hagan <mnhagan88@...il.com> To: unlisted-recipients:; (no To-header on input) Cc: Matthew Hagan <mnhagan88@...il.com>, Russell King <linux@...linux.org.uk>, Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] net: sfp: Add tx-fault quirk for Huawei MA5671A SFP ONT As noted elsewhere [1], various GPON SFP modules exhibit non-standard TX-fault behaviour. In the tested case, the Huawei MA5671A, when used in combination with a Marvell 88E6393X switch, was found to persistently assert TX-fault, resulting in the module being disabled. This patch adds a quirk to ignore changes to the the SFP_F_TX_FAULT state, thus allowing the module to function. [1] https://lore.kernel.org/all/20200110114433.GZ25745@shell.armlinux.org.uk/ Signed-off-by: Matthew Hagan <mnhagan88@...il.com> --- drivers/net/phy/sfp.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 4dfb79807823..11a20687b273 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -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 +1957,14 @@ 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; + return 0; } @@ -2409,7 +2418,10 @@ 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)) -- 2.27.0
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