| Message ID | 1711660035-9656-1-git-send-email-quic_khsieh@quicinc.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v1] phy/qcom-qmp-combo: propagate correct return value at phy_power_on() | expand |
On 3/28/2024 2:07 PM, Kuogee Hsieh wrote: > Currently qmp_combo_dp_power_on() always return 0 in regardless of > return value of cfg->configure_dp_phy(). This patch propagate > return value of cfg->configure_dp_phy() all the way back to caller. > This is good. But I am also thinking if we should add some prints in this driver like it doesnt even tell where it failed like here ret = qmp_v456_configure_dp_phy(qmp); if (ret < 0) return ret; > Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> > --- > drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 5 +++-- > 1 file changed, 3 insertions(+), 2 deletions(-) > Also, I think we should have Fixes: 94a407cc17a4 ("phy: qcom-qmp: create copies of QMP PHY driver") If there is a better fixes tag for this, please let me know. > diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > index 36632fa..884973a 100644 > --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > @@ -2754,6 +2754,7 @@ static int qmp_combo_dp_power_on(struct phy *phy) > const struct qmp_phy_cfg *cfg = qmp->cfg; > void __iomem *tx = qmp->dp_tx; > void __iomem *tx2 = qmp->dp_tx2; > + int ret = 0; > > mutex_lock(&qmp->phy_mutex); > > @@ -2766,11 +2767,11 @@ static int qmp_combo_dp_power_on(struct phy *phy) > cfg->configure_dp_tx(qmp); > > /* Configure link rate, swing, etc. */ > - cfg->configure_dp_phy(qmp); > + ret = cfg->configure_dp_phy(qmp); > > mutex_unlock(&qmp->phy_mutex); > > - return 0; > + return ret; > } > > static int qmp_combo_dp_power_off(struct phy *phy)
On Thu, 28 Mar 2024 at 23:36, Abhinav Kumar <quic_abhinavk@quicinc.com> wrote: > > > > On 3/28/2024 2:07 PM, Kuogee Hsieh wrote: > > Currently qmp_combo_dp_power_on() always return 0 in regardless of > > return value of cfg->configure_dp_phy(). This patch propagate > > return value of cfg->configure_dp_phy() all the way back to caller. > > > > This is good. But I am also thinking if we should add some prints in > this driver like it doesnt even tell where it failed like here > > > ret = qmp_v456_configure_dp_phy(qmp); > if (ret < 0) > return ret; > > > Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> > > --- > > drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 5 +++-- > > 1 file changed, 3 insertions(+), 2 deletions(-) > > > > Also, I think we should have > > Fixes: 94a407cc17a4 ("phy: qcom-qmp: create copies of QMP PHY driver") > > If there is a better fixes tag for this, please let me know. Fixes: 52e013d0bffa ("phy: qcom-qmp: Add support for DP in USB3+DP combo phy") Otherwise LGTM > > > diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > > index 36632fa..884973a 100644 > > --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > > +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > > @@ -2754,6 +2754,7 @@ static int qmp_combo_dp_power_on(struct phy *phy) > > const struct qmp_phy_cfg *cfg = qmp->cfg; > > void __iomem *tx = qmp->dp_tx; > > void __iomem *tx2 = qmp->dp_tx2; > > + int ret = 0; > > > > mutex_lock(&qmp->phy_mutex); > > > > @@ -2766,11 +2767,11 @@ static int qmp_combo_dp_power_on(struct phy *phy) > > cfg->configure_dp_tx(qmp); > > > > /* Configure link rate, swing, etc. */ > > - cfg->configure_dp_phy(qmp); > > + ret = cfg->configure_dp_phy(qmp); > > > > mutex_unlock(&qmp->phy_mutex); > > > > - return 0; > > + return ret; > > } > > > > static int qmp_combo_dp_power_off(struct phy *phy)
Quoting Kuogee Hsieh (2024-03-28 14:07:15) > diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > index 36632fa..884973a 100644 > --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c > @@ -2754,6 +2754,7 @@ static int qmp_combo_dp_power_on(struct phy *phy) > const struct qmp_phy_cfg *cfg = qmp->cfg; > void __iomem *tx = qmp->dp_tx; > void __iomem *tx2 = qmp->dp_tx2; > + int ret = 0; Please don't initialize locals that are unused before being assigned unconditionally. > > mutex_lock(&qmp->phy_mutex); > > @@ -2766,11 +2767,11 @@ static int qmp_combo_dp_power_on(struct phy *phy) > cfg->configure_dp_tx(qmp); > > /* Configure link rate, swing, etc. */ > - cfg->configure_dp_phy(qmp); > + ret = cfg->configure_dp_phy(qmp); > > mutex_unlock(&qmp->phy_mutex); > > - return 0; > + return ret; > }
diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c index 36632fa..884973a 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c @@ -2754,6 +2754,7 @@ static int qmp_combo_dp_power_on(struct phy *phy) const struct qmp_phy_cfg *cfg = qmp->cfg; void __iomem *tx = qmp->dp_tx; void __iomem *tx2 = qmp->dp_tx2; + int ret = 0; mutex_lock(&qmp->phy_mutex); @@ -2766,11 +2767,11 @@ static int qmp_combo_dp_power_on(struct phy *phy) cfg->configure_dp_tx(qmp); /* Configure link rate, swing, etc. */ - cfg->configure_dp_phy(qmp); + ret = cfg->configure_dp_phy(qmp); mutex_unlock(&qmp->phy_mutex); - return 0; + return ret; } static int qmp_combo_dp_power_off(struct phy *phy)
Currently qmp_combo_dp_power_on() always return 0 in regardless of return value of cfg->configure_dp_phy(). This patch propagate return value of cfg->configure_dp_phy() all the way back to caller. Signed-off-by: Kuogee Hsieh <quic_khsieh@quicinc.com> --- drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)