diff options
| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-04-16 16:48:02 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 11:55:34 +0200 |
| commit | c3595df7a6115db74dfc23b0bac214c0ec62cad8 (patch) | |
| tree | dede8906ac6e5df313d0f9b08210ff6bc45018ad /drivers/usb | |
| parent | e358c2159cd6be2fe1af348f7d652fd461a873cf (diff) | |
usb: dwc2: Allow exit hibernation in urb enqueue
When core is in hibernation state and an external
hub is connected, upper layer sends URB enqueue request,
which results in port reset issue.
- Added exit from hibernation state to avoid port
reset issue and process upper layer request properly.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124803.D1C1FA005F@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/dwc2/hcd.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/hcd.c b/drivers/usb/dwc2/hcd.c index cc9ad6cf02d9..093b1717df01 100644 --- a/drivers/usb/dwc2/hcd.c +++ b/drivers/usb/dwc2/hcd.c @@ -4631,12 +4631,26 @@ static int _dwc2_hcd_urb_enqueue(struct usb_hcd *hcd, struct urb *urb, struct dwc2_qh *qh; bool qh_allocated = false; struct dwc2_qtd *qtd; + struct dwc2_gregs_backup *gr; + + gr = &hsotg->gr_backup; if (dbg_urb(urb)) { dev_vdbg(hsotg->dev, "DWC OTG HCD URB Enqueue\n"); dwc2_dump_urb_info(hcd, urb, "urb_enqueue"); } + if (hsotg->hibernated) { + if (gr->gotgctl & GOTGCTL_CURMODE_HOST) + retval = dwc2_exit_hibernation(hsotg, 0, 0, 1); + else + retval = dwc2_exit_hibernation(hsotg, 0, 0, 0); + + if (retval) + dev_err(hsotg->dev, + "exit hibernation failed.\n"); + } + if (hsotg->in_ppd) { retval = dwc2_exit_partial_power_down(hsotg, 0, true); if (retval) |