[PATCH 15/15] usb: dwc2: Get rid of useless error checks in suspend interrupt

Artur Petrosyan
2021-04-15T05:41:32Z

Squashed from Douglas Anderson's suggested commit
"usb: dwc2: Get rid of useless error checks for
hibernation/partial power down"

- After this commit there should never be any
case where dwc2_enter_partial_power_down() and
dwc2_enter_hibernation() are called when
'params.power_down' is not correct. Get rid of
the pile of error checking.

- As part of this cleanup some of the error messages
not to have __func__ in them. That's not needed
for dev_err() calls since they already have the
device name as part of the message.

Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
---
drivers/usb/dwc2/core.c | 3 ---
drivers/usb/dwc2/core_intr.c | 18 +++++++-----------
2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c
index 576c262dba55..6f70ab9577b4 100644
--- a/drivers/usb/dwc2/core.c
+++ b/drivers/usb/dwc2/core.c
@@ -391,9 +391,6 @@ static bool dwc2_iddig_filter_enabled(struct dwc2_hsotg *hsotg)
*/
int dwc2_enter_hibernation(struct dwc2_hsotg *hsotg, int is_host)
{
- if (hsotg->params.power_down != DWC2_POWER_DOWN_PARAM_HIBERNATION)
- return -ENOTSUPP;
-
if (is_host)
return dwc2_host_enter_hibernation(hsotg);
else
diff --git a/drivers/usb/dwc2/core_intr.c b/drivers/usb/dwc2/core_intr.c
index 470458ac664b..a5ab03808da6 100644
--- a/drivers/usb/dwc2/core_intr.c
+++ b/drivers/usb/dwc2/core_intr.c
@@ -535,13 +535,10 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
switch (hsotg->params.power_down) {
case DWC2_POWER_DOWN_PARAM_PARTIAL:
ret = dwc2_enter_partial_power_down(hsotg);
- if (ret) {
- if (ret != -ENOTSUPP)
- dev_err(hsotg->dev,
- "%s: enter partial_power_down failed\n",
- __func__);
- goto skip_power_saving;
- }
+ if (ret)
+ dev_err(hsotg->dev,
+ "enter partial_power_down failed\n");
+
udelay(100);

/* Ask phy to be suspended */
@@ -550,10 +547,9 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
break;
case DWC2_POWER_DOWN_PARAM_HIBERNATION:
ret = dwc2_enter_hibernation(hsotg, 0);
- if (ret && ret != -ENOTSUPP)
+ if (ret)
dev_err(hsotg->dev,
- "%s: enter hibernation failed\n",
- __func__);
+ "enter hibernation failed\n");
break;
case DWC2_POWER_DOWN_PARAM_NONE:
/*
@@ -562,7 +558,7 @@ static void dwc2_handle_usb_suspend_intr(struct dwc2_hsotg *hsotg)
*/
dwc2_gadget_enter_clock_gating(hsotg);
}
-skip_power_saving:
+
/*
* Change to L2 (suspend) state before releasing
* spinlock
--
2.25.1