Commit 8f86b1b3 authored Jun 26, 2023 by Guiting Shen Committed by Greg Kroah-Hartman Aug 11, 2023

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



commit c55afcbeaa7a6f4fffdbc999a9bf3f0b29a5186f upstream.

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>

parent 640cb5f5

drivers/usb/host/ohci-at91.c

+7 −1

Original line number	Diff line number	Diff line
		@@ -645,7 +645,13 @@ ohci_hcd_at91_drv_resume(struct device *dev)

		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);

		ohci_at91_port_suspend(ohci_at91->sfr_regmap, 0);