diff options
| author | Artur Petrosyan <Arthur.Petrosyan@synopsys.com> | 2021-04-16 16:47:38 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-22 11:55:34 +0200 |
| commit | 5160d6871aaede2f7e27e2137b6571940f25697a (patch) | |
| tree | fd694bf499c7586a563cf047eb714ad5151218e3 /drivers/usb/dwc2 | |
| parent | 238f65aeeae8329fd6f6c2a9b87f2972b96094e5 (diff) | |
usb: dwc2: Clear GINTSTS_RESTOREDONE bit after restore is generated.
When hibernation exit is performed the dwc2_hib_restore_common()
function is called. In that function we wait until GINTSTS_RESTOREDONE
bit is set. However, after the setting of that bit we get a lot of
(dwc2_hsotg_irq:) interrupts which indicates that (GINTSTS.RstrDoneInt)
restore done interrupt is asserted.
To avoid restore done interrupt storm after restore is generated
clear GINTSTS_RESTOREDONE bit in GINTSTS register.
Acked-by: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>
Signed-off-by: Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Link: https://lore.kernel.org/r/20210416124739.D6269A005D@mailhost.synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/dwc2')
| -rw-r--r-- | drivers/usb/dwc2/core.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/dwc2/core.c b/drivers/usb/dwc2/core.c index eccd96fa164e..576c262dba55 100644 --- a/drivers/usb/dwc2/core.c +++ b/drivers/usb/dwc2/core.c @@ -299,6 +299,12 @@ void dwc2_hib_restore_common(struct dwc2_hsotg *hsotg, int rem_wakeup, __func__); } else { dev_dbg(hsotg->dev, "restore done generated here\n"); + + /* + * To avoid restore done interrupt storm after restore is + * generated clear GINTSTS_RESTOREDONE bit. + */ + dwc2_writel(hsotg, GINTSTS_RESTOREDONE, GINTSTS); } } |