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usb: dwc2: Allow exit clock gating in urb enqueue 

When core is in clock gating state and an external
hub is connected, upper layer sends URB enqueue request,
which results in port reset issue.

Added exit from clock gating state to avoid port
reset issue and process upper layer request properly.

Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210413073708.ADFC6A0094@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Artur Petrosyan 2021-04-13 11:37:07 +04:00 committed by Greg Kroah-Hartman
parent 3cf8143e47
commit 16c729f90b
1 changed files with 8 additions and 0 deletions
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8
drivers/usb/dwc2/hcd.c
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@ -4597,6 +4597,14 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb,
"exit partial_power_down failed\n");
}
if (hsotg->params.power_down == DWC2_POWER_DOWN_PARAM_NONE &&
hsotg->bus_suspended) {
if (dwc2_is_device_mode(hsotg))
dwc2_gadget_exit_clock_gating(hsotg, 0);
else
dwc2_host_exit_clock_gating(hsotg, 0);
}
if (!ep)
return -EINVAL;