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usb: dwc2: do not gate off the hardware if it does not support clock gating

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[ Upstream commit 34146c6808 ]

We should not be clearing the HCD_FLAG_HW_ACCESSIBLE bit if the hardware
does not support clock gating.

Fixes: 50fb0c128b ("usb: dwc2: Add clock gating entering flow by system suspend")
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Link: https://lore.kernel.org/r/20220104135922.734776-1-dinguyen@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dinh Nguyen
2022-01-04 07:59:22 -06:00
committed by Greg Kroah-Hartman
parent 5157828d39
commit 85a75d45f7
1 changed files with 4 additions and 3 deletions
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7
drivers/usb/dwc2/hcd.c
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@@ -4403,11 +4403,12 @@ static int _dwc2_hcd_suspend(struct usb_hcd *hcd)
* If not hibernation nor partial power down are supported,
* clock gating is used to save power.
*/
if (!hsotg->params.no_clock_gating)
if (!hsotg->params.no_clock_gating) {
dwc2_host_enter_clock_gating(hsotg);
/* After entering suspend, hardware is not accessible */
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
/* After entering suspend, hardware is not accessible */
clear_bit(HCD_FLAG_HW_ACCESSIBLE, &hcd->flags);
}
break;
default:
goto skip_power_saving;