kevin/linux
1
Fork 0
Code

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

Browse Source 
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>
This commit is contained in:
Guiting Shen 2023-07-28 20:06:48 +08:00 committed by Greg Kroah-Hartman
parent 25a1489dc4
commit e0f7588252
1 changed files with 7 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
drivers/usb/host/ohci-at91.c
View File

@ -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;
}