On Tuesday 11 November 2008, Anton Vorontsov wrote:
> Freescale QE UDC controllers can't report the "port change" states,
> so the only way to handle disconnects is to process bus reset
> interrupts. The bus reset can take some time, that is, few irqs.
> Gadgets may print the disconnection events, and this causes few
> repetitive messages in the kernel log.
>
> This patch fixes the issue by using the usb_state machine, if the
> usb controller has been already reset, just quit the reset irq
> early.
>
> Signed-off-by: Anton Vorontsov <[EMAIL PROTECTED]>
Acked-by: David Brownell <[EMAIL PROTECTED]>
Note that the "port change" you reference is more typically
packaged as "VBUS detect" ... often handled with a GPIO.
> ---
> drivers/usb/gadget/fsl_qe_udc.c | 3 +++
> 1 files changed, 3 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/usb/gadget/fsl_qe_udc.c b/drivers/usb/gadget/fsl_qe_udc.c
> index 1789f65..7bb5f36 100644
> --- a/drivers/usb/gadget/fsl_qe_udc.c
> +++ b/drivers/usb/gadget/fsl_qe_udc.c
> @@ -2161,6 +2161,9 @@ static int reset_irq(struct qe_udc *udc)
> {
> unsigned char i;
>
> + if (udc->usb_state == USB_STATE_DEFAULT)
> + return 0;
> +
> qe_usb_disable();
> out_8(&udc->usb_regs->usb_usadr, 0);
>
> --
> 1.5.6.3
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-usb" in
> the body of a message to [EMAIL PROTECTED]
> More majordomo info at http://vger.kernel.org/majordomo-info.html
>
>
_______________________________________________
Linuxppc-dev mailing list
Linuxppc-dev@ozlabs.org
https://ozlabs.org/mailman/listinfo/linuxppc-dev
