| Message ID | 20210420102208.5834-1-michael@walle.cc (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | [net-next] net: phy: at803x: fix probe error if copper page is selected | expand |
| Context | Check | Description |
|---|---|---|
| netdev/cover_letter | success | Link |
| netdev/fixes_present | success | Link |
| netdev/patch_count | success | Link |
| netdev/tree_selection | success | Clearly marked for net-next |
| netdev/subject_prefix | success | Link |
| netdev/cc_maintainers | success | CCed 7 of 7 maintainers |
| netdev/source_inline | success | Was 0 now: 0 |
| netdev/verify_signedoff | success | Link |
| netdev/module_param | success | Was 0 now: 0 |
| netdev/build_32bit | fail | Errors and warnings before: 6 this patch: 6 |
| netdev/kdoc | success | Errors and warnings before: 0 this patch: 0 |
| netdev/verify_fixes | success | Link |
| netdev/checkpatch | success | total: 0 errors, 0 warnings, 0 checks, 40 lines checked |
| netdev/build_allmodconfig_warn | success | Errors and warnings before: 0 this patch: 0 |
| netdev/header_inline | success | Link |
diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c index e0f56850edc5..5bec200f2132 100644 --- a/drivers/net/phy/at803x.c +++ b/drivers/net/phy/at803x.c @@ -554,10 +554,6 @@ static int at803x_parse_dt(struct phy_device *phydev) phydev_err(phydev, "failed to get VDDIO regulator\n"); return PTR_ERR(priv->vddio); } - - ret = regulator_enable(priv->vddio); - if (ret < 0) - return ret; } return 0; @@ -579,15 +575,28 @@ static int at803x_probe(struct phy_device *phydev) if (ret) return ret; + if (priv->vddio) { + ret = regulator_enable(priv->vddio); + if (ret < 0) + return ret; + } + /* Some bootloaders leave the fiber page selected. * Switch to the copper page, as otherwise we read * the PHY capabilities from the fiber side. */ if (at803x_match_phy_id(phydev, ATH8031_PHY_ID)) { - ret = phy_select_page(phydev, AT803X_PAGE_COPPER); - ret = phy_restore_page(phydev, AT803X_PAGE_COPPER, ret); + ret = at803x_write_page(phydev, AT803X_PAGE_COPPER); + if (ret) + goto err; } + return 0; + +err: + if (priv->vddio) + regulator_disable(priv->vddio); + return ret; }
The commit c329e5afb42f ("net: phy: at803x: select correct page on config init") selects the copper page during probe. This fails if the copper page was already selected. In this case, the value of the copper page (which is 1) is propagated through phy_restore_page() and is finally returned for at803x_probe(). Fix it, by just using the at803x_page_write() directly. Also in case of an error, the regulator is not disabled and leads to a WARN_ON() when the probe fails. This couldn't happen before, because at803x_parse_dt() was the last call in at803x_probe(). It is hard to see, that the parse_dt() actually enables the regulator. Thus move the regulator_enable() to the probe function and undo it in case of an error. Fixes: c329e5afb42f ("net: phy: at803x: select correct page on config init") Signed-off-by: Michael Walle <michael@walle.cc> --- drivers/net/phy/at803x.c | 21 +++++++++++++++------ 1 file changed, 15 insertions(+), 6 deletions(-)