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Diffstat (limited to 'target/linux/generic/backport-5.4/733-v5.5-net-sfp-split-power-mode-switching-from-probe.patch')
-rw-r--r--target/linux/generic/backport-5.4/733-v5.5-net-sfp-split-power-mode-switching-from-probe.patch184
1 files changed, 0 insertions, 184 deletions
diff --git a/target/linux/generic/backport-5.4/733-v5.5-net-sfp-split-power-mode-switching-from-probe.patch b/target/linux/generic/backport-5.4/733-v5.5-net-sfp-split-power-mode-switching-from-probe.patch
deleted file mode 100644
index f645e44191..0000000000
--- a/target/linux/generic/backport-5.4/733-v5.5-net-sfp-split-power-mode-switching-from-probe.patch
+++ /dev/null
@@ -1,184 +0,0 @@
-From fdff863a4ce3677907f64396e34c45025abb6600 Mon Sep 17 00:00:00 2001
-From: Russell King <rmk+kernel@armlinux.org.uk>
-Date: Tue, 5 Nov 2019 12:59:36 +0000
-Subject: [PATCH 631/660] net: sfp: split power mode switching from probe
-
-Switch the power mode switching from the probe, so that we don't
-repeatedly re-probe the SFP device if there is a problem accessing
-the registers at I2C address 0x51.
-
-In splitting this out, we can also fix a bug where we leave the module
-in high-power mode when the upstream device is detached but the module
-is still inserted.
-
-Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
----
- drivers/net/phy/sfp.c | 101 ++++++++++++++++++++++++++----------------
- 1 file changed, 64 insertions(+), 37 deletions(-)
-
---- a/drivers/net/phy/sfp.c
-+++ b/drivers/net/phy/sfp.c
-@@ -49,6 +49,7 @@ enum {
- SFP_MOD_EMPTY = 0,
- SFP_MOD_PROBE,
- SFP_MOD_HPOWER,
-+ SFP_MOD_WAITPWR,
- SFP_MOD_PRESENT,
- SFP_MOD_ERROR,
-
-@@ -71,6 +72,7 @@ static const char * const mod_state_str
- [SFP_MOD_EMPTY] = "empty",
- [SFP_MOD_PROBE] = "probe",
- [SFP_MOD_HPOWER] = "hpower",
-+ [SFP_MOD_WAITPWR] = "waitpwr",
- [SFP_MOD_PRESENT] = "present",
- [SFP_MOD_ERROR] = "error",
- };
-@@ -1423,37 +1425,34 @@ static int sfp_module_parse_power(struct
- return 0;
- }
-
--static int sfp_sm_mod_hpower(struct sfp *sfp)
-+static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable)
- {
- u8 val;
- int err;
-
-- if (sfp->module_power_mW <= 1000)
-- return 0;
--
- err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
- if (err != sizeof(val)) {
- dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err);
-- err = -EAGAIN;
-- goto err;
-+ return -EAGAIN;
- }
-
-- val |= BIT(0);
-+ if (enable)
-+ val |= BIT(0);
-+ else
-+ val &= ~BIT(0);
-
- err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val));
- if (err != sizeof(val)) {
- dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err);
-- err = -EAGAIN;
-- goto err;
-+ return -EAGAIN;
- }
-
-- dev_info(sfp->dev, "Module switched to %u.%uW power level\n",
-- sfp->module_power_mW / 1000,
-- (sfp->module_power_mW / 100) % 10);
-- return T_HPOWER_LEVEL;
-+ if (enable)
-+ dev_info(sfp->dev, "Module switched to %u.%uW power level\n",
-+ sfp->module_power_mW / 1000,
-+ (sfp->module_power_mW / 100) % 10);
-
--err:
-- return err;
-+ return 0;
- }
-
- static int sfp_sm_mod_probe(struct sfp *sfp)
-@@ -1549,7 +1548,7 @@ static int sfp_sm_mod_probe(struct sfp *
- if (ret < 0)
- return ret;
-
-- return sfp_sm_mod_hpower(sfp);
-+ return 0;
- }
-
- static void sfp_sm_mod_remove(struct sfp *sfp)
-@@ -1594,13 +1593,22 @@ 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.
-- * Also deal with upstream detachment.
-- */
-- if (event == SFP_E_REMOVE || sfp->sm_dev_state < SFP_DEV_DOWN) {
-+ int err;
-+
-+ /* 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);
-- if (sfp->sm_mod_state != SFP_MOD_EMPTY)
-+ sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0);
-+ return;
-+ }
-+
-+ /* Handle device detach globally */
-+ if (sfp->sm_dev_state < SFP_DEV_DOWN) {
-+ if (sfp->module_power_mW > 1000 &&
-+ sfp->sm_mod_state > SFP_MOD_HPOWER)
-+ sfp_sm_mod_hpower(sfp, false);
-+ if (sfp->sm_mod_state > SFP_MOD_EMPTY)
- sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0);
- return;
- }
-@@ -1612,26 +1620,45 @@ static void sfp_sm_module(struct sfp *sf
- break;
-
- case SFP_MOD_PROBE:
-- if (event == SFP_E_TIMEOUT) {
-- int val = sfp_sm_mod_probe(sfp);
-+ if (event != SFP_E_TIMEOUT)
-+ break;
-
-- if (val == 0)
-- sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0);
-- else if (val > 0)
-- sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, val);
-- else if (val != -EAGAIN)
-- sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
-- else
-- sfp_sm_set_timer(sfp, T_PROBE_RETRY);
-+ err = sfp_sm_mod_probe(sfp);
-+ if (err == -EAGAIN) {
-+ sfp_sm_set_timer(sfp, T_PROBE_RETRY);
-+ break;
- }
-- break;
-+ if (err < 0) {
-+ sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
-+ break;
-+ }
-+
-+ /* If this is a power level 1 module, we are done */
-+ if (sfp->module_power_mW <= 1000)
-+ goto insert;
-
-+ sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0);
-+ /* fall through */
- case SFP_MOD_HPOWER:
-- if (event == SFP_E_TIMEOUT) {
-- sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0);
-+ /* Enable high power mode */
-+ err = sfp_sm_mod_hpower(sfp, true);
-+ if (err == 0)
-+ sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL);
-+ else if (err != -EAGAIN)
-+ sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0);
-+ else
-+ sfp_sm_set_timer(sfp, T_PROBE_RETRY);
-+ break;
-+
-+ case SFP_MOD_WAITPWR:
-+ /* Wait for T_HPOWER_LEVEL to time out */
-+ if (event != SFP_E_TIMEOUT)
- break;
-- }
-- /* fallthrough */
-+
-+ insert:
-+ sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0);
-+ break;
-+
- case SFP_MOD_PRESENT:
- case SFP_MOD_ERROR:
- break;
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