diff options
| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-04-08 13:45:33 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-09 15:16:38 +0200 |
| commit | 4d4d99afa2b0fc53dc55f0c3ed215cdecd1197c5 (patch) | |
| tree | 406c60eda2f63edbb49094c12bd8c06c49cfa529 /drivers/usb/dwc2/hcd.c | |
| parent | e97570f7a72022b459ba0c8d1123019594ee8bdb (diff) | |
usb: dwc2: Add part. power down exit from dwc2_conn_id_status_change().
Before changing to connector B exiting from Partial
Power Down is required.
- Added exiting from Partial Power Down mode when
connector ID status changes to "connId B".
Because if connector ID status changed to B connector
while core was in partial power down mode, HANG would
accrue from a soft reset.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210408094534.4AA7AA022E@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2/hcd.c')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index 7c7496719152..9529e9839961 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -3206,6 +3206,15 @@ static void dwc2_conn_id_status_change(struct work_struct *work) if (count > 250) dev_err(hsotg->dev, "Connection id status change timed out\n"); + + /* + * Exit Partial Power Down without restoring registers. + * No need to check the return value as registers + * are not being restored. + */ + if (hsotg->in_ppd && hsotg->lx_state == DWC2_L2) + dwc2_exit_partial_power_down(hsotg, 0, false); + hsotg->op_state = OTG_STATE_B_PERIPHERAL; dwc2_core_init(hsotg, false); dwc2_enable_global_interrupts(hsotg); |