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| author | Guiting Shen <aarongt.shen@gmail.com> | 2023-07-28 14:06:48 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-07-30 13:26:09 +0200 |
| commit | e0f75882521f1416406981299fd99777b5d02dcc (patch) | |
| tree | d0691f07be3a0b11d0485ad9231fe3ec7e9d7559 /drivers/usb/host | |
| parent | dt-bindings: usb: ehci: Add atmel at91sam9g45-ehci compatible (diff) | |
| download | linux-e0f75882521f1416406981299fd99777b5d02dcc.tar.xz linux-e0f75882521f1416406981299fd99777b5d02dcc.zip | |
usb: ohci-at91: Fix the unhandle interrupt when resume
The ohci_hcd_at91_drv_suspend() sets ohci->rh_state to OHCI_RH_HALTED when
suspend which will let the ohci_irq() skip the interrupt after resume. And
nobody to handle this interrupt.
According to the comment in ohci_hcd_at91_drv_suspend(), it need to reset
when resume from suspend(MEM) to fix by setting "hibernated" argument of
ohci_resume().
Signed-off-by: Guiting Shen <aarongt.shen@gmail.com>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20230728120648.5878-1-aarongt.shen@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/host')
| -rw-r--r-- | drivers/usb/host/ohci-at91.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/usb/host/ohci-at91.c b/drivers/usb/host/ohci-at91.c index dc31a7fa7ca4..f691cd98a574 100644 --- a/drivers/usb/host/ohci-at91.c +++ b/drivers/usb/host/ohci-at91.c @@ -669,7 +669,13 @@ ohci_hcd_at91_drv_resume(struct device *dev) else at91_start_clock(ohci_at91); - ohci_resume(hcd, false); + /* + * According to the comment in ohci_hcd_at91_drv_suspend() + * we need to do a reset if the 48Mhz clock was stopped, + * that is, if ohci_at91->wakeup is clear. Tell ohci_resume() + * to reset in this case by setting its "hibernated" flag. + */ + ohci_resume(hcd, !ohci_at91->wakeup); return 0; } |