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authorMatthew Hagan <mnhagan88@gmail.com>2022-05-04 08:26:44 +0100
committerChristian Lamparter <chunkeey@gmail.com>2022-05-07 16:27:27 +0200
commitd9fae43202f3d43cb199bd527cca8f170da70b7d (patch)
tree14f7c52d9cdaee3d253ae957e1b95b48f6f7420c
parentb2c9c4dda28dd9bd82df629d96d626d2c236f382 (diff)
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kernel: backports: add Huawei MA5671A tx-fault workaround
This workaround will allow the MA5671A to function, ignoring the persistently asserted tx-fault. Signed-off-by: Matthew Hagan <mnhagan88@gmail.com> (added 5.15 backport) Signed-off-by: Christian Lamparter <chunkeey@gmail.com>
-rw-r--r--target/linux/generic/backport-5.10/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch57
-rw-r--r--target/linux/generic/backport-5.15/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch57
2 files changed, 114 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.10/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch b/target/linux/generic/backport-5.10/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch
new file mode 100644
index 0000000000..7a9de8ee1e
--- /dev/null
+++ b/target/linux/generic/backport-5.10/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch
@@ -0,0 +1,57 @@
+From f81d97cb646ab8b90fb181d66fccaf9589990de6 Mon Sep 17 00:00:00 2001
+From: Matthew Hagan <mnhagan88@gmail.com>
+Date: Sat, 30 Apr 2022 11:00:49 +0100
+Subject: [PATCH v2] 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: Matthew Hagan <mnhagan88@gmail.com>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+---
+ drivers/net/phy/sfp.c | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -249,6 +249,7 @@ 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;
+@@ -1893,6 +1894,12 @@ static int sfp_sm_mod_probe(struct sfp *
+ 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;
+ }
+
+@@ -2320,7 +2327,10 @@ static void sfp_check_state(struct 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))
diff --git a/target/linux/generic/backport-5.15/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch b/target/linux/generic/backport-5.15/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch
new file mode 100644
index 0000000000..bcada79fb2
--- /dev/null
+++ b/target/linux/generic/backport-5.15/890-v5.19-net-sfp-Add-tx-fault-workaround-for-Huawei-MA5671A-SFP-ON.patch
@@ -0,0 +1,57 @@
+From f81d97cb646ab8b90fb181d66fccaf9589990de6 Mon Sep 17 00:00:00 2001
+From: Matthew Hagan <mnhagan88@gmail.com>
+Date: Sat, 30 Apr 2022 11:00:49 +0100
+Subject: [PATCH v2] 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: Matthew Hagan <mnhagan88@gmail.com>
+Reviewed-by: Andrew Lunn <andrew@lunn.ch>
+---
+ drivers/net/phy/sfp.c | 12 +++++++++++-
+ 1 file changed, 11 insertions(+), 1 deletion(-)
+
+--- 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;
+@@ -1945,6 +1946,12 @@ static int sfp_sm_mod_probe(struct sfp *
+ 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;
+ }
+
+@@ -2397,7 +2404,10 @@ static void sfp_check_state(struct 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))