diff options
Diffstat (limited to 'target/linux/generic/backport-5.4/723-v5.5-net-sfp-handle-module-remove-outside-state-machine.patch')
| -rw-r--r-- | target/linux/generic/backport-5.4/723-v5.5-net-sfp-handle-module-remove-outside-state-machine.patch | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.4/723-v5.5-net-sfp-handle-module-remove-outside-state-machine.patch b/target/linux/generic/backport-5.4/723-v5.5-net-sfp-handle-module-remove-outside-state-machine.patch new file mode 100644 index 0000000000..542aeaea77 --- /dev/null +++ b/target/linux/generic/backport-5.4/723-v5.5-net-sfp-handle-module-remove-outside-state-machine.patch @@ -0,0 +1,53 @@ +From d2591ea5520e2ee8fa557f96bb64c23cafac4b20 Mon Sep 17 00:00:00 2001 +From: Russell King <rmk+kernel@armlinux.org.uk> +Date: Tue, 15 Oct 2019 10:33:13 +0100 +Subject: [PATCH 621/660] net: sfp: handle module remove outside state machine + +Removing a module resets the module state machine back to its initial +state. Rather than explicitly handling this in every state, handle it +early on outside of the state machine. + +Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> +--- + drivers/net/phy/sfp.c | 16 +++++++++------- + 1 file changed, 9 insertions(+), 7 deletions(-) + +--- a/drivers/net/phy/sfp.c ++++ b/drivers/net/phy/sfp.c +@@ -1500,6 +1500,14 @@ static void sfp_sm_device(struct sfp *sf + */ + static void sfp_sm_module(struct sfp *sfp, unsigned int event) + { ++ /* Handle remove event globally, it resets this state machine */ ++ if (event == SFP_E_REMOVE) { ++ if (sfp->sm_mod_state > SFP_MOD_PROBE) ++ sfp_sm_mod_remove(sfp); ++ sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); ++ return; ++ } ++ + switch (sfp->sm_mod_state) { + default: + if (event == SFP_E_INSERT && sfp->attached) { +@@ -1509,9 +1517,7 @@ static void sfp_sm_module(struct sfp *sf + break; + + case SFP_MOD_PROBE: +- if (event == SFP_E_REMOVE) { +- sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); +- } else if (event == SFP_E_TIMEOUT) { ++ if (event == SFP_E_TIMEOUT) { + int val = sfp_sm_mod_probe(sfp); + + if (val == 0) +@@ -1533,10 +1539,6 @@ static void sfp_sm_module(struct sfp *sf + /* fallthrough */ + case SFP_MOD_PRESENT: + case SFP_MOD_ERROR: +- if (event == SFP_E_REMOVE) { +- sfp_sm_mod_remove(sfp); +- sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); +- } + break; + } + } |