On Sat, 15 Oct 2016, Bryan Paluch wrote:

> Increase ohci watchout delay to 275 ms. Previous delay was 250 ms
> with 20 ms of slack, after removing slack time some ohci controllers don't
> respond in time. Logs from systems with controllers that have the
> issue would show "HcDoneHead not written back; disabled"
> 
> Signed-off-by: Bryan Paluch <bryanpal...@gmail.com>
> ---
> Reported and discussed:
> https://lkml.kernel.org/r/<
> pine.lnx.4.44l0.1610151100250.29083-100...@netrider.rowland.org>
>  drivers/usb/host/ohci-hcd.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/ohci-hcd.c b/drivers/usb/host/ohci-hcd.c
> index 1700908..86612ac 100644
> --- a/drivers/usb/host/ohci-hcd.c
> +++ b/drivers/usb/host/ohci-hcd.c
> @@ -72,7 +72,7 @@
>  static const char      hcd_name [] = "ohci_hcd";
> 
>  #define        STATECHANGE_DELAY       msecs_to_jiffies(300)
> -#define        IO_WATCHDOG_DELAY       msecs_to_jiffies(250)
> +#define        IO_WATCHDOG_DELAY       msecs_to_jiffies(275)
> 
>  #include "ohci.h"
>  #include "pci-quirks.h"

Acked-by: Alan Stern <st...@rowland.harvard.edu>

Greg, this should be marked for -stable; the problem was apparently
introduced between 4.7 and 4.8.

Alan Stern

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