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usb: ohci-at91: Fix the unhandle interrupt when resume

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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>
Cc: stable <stable@kernel.org>
Reviewed-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/20230626152713.18950-1-aarongt.shen@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Guiting Shen 2023-06-26 23:27:13 +08:00 committed by Greg Kroah-Hartman
parent 13e098b58b
commit c55afcbeaa
1 changed files with 7 additions and 1 deletions
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8
drivers/usb/host/ohci-at91.c
View file

@ -672,7 +672,13 @@ 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;
}