2010/9/24 Felipe Balbi <balbi@xxxxxx>:
> From: Hema HK <hemahk@xxxxxx>
>
> Buffer is mapped to dma when dma channel is allocated. buffer needs
> to be unmapped when fallback to PIO mode if dma channel_program
> fails.
>
> Signed-off-by: Hema HK <hemahk@xxxxxx>
> Signed-off-by: Felipe Balbi <balbi@xxxxxx>
> ---
> drivers/usb/musb/musb_gadget.c | 122 +++++++++++++++++++++++++++-------------
> 1 files changed, 82 insertions(+), 40 deletions(-)
>
> diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
> index 36968fc..2aba817 100644
> --- a/drivers/usb/musb/musb_gadget.c
> +++ b/drivers/usb/musb/musb_gadget.c
> @@ -92,6 +92,60 @@
> @@ -298,7 +336,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
> csr);
>
> #ifndef CONFIG_MUSB_PIO_ONLY
> - if (is_dma_capable() && musb_ep->dma) {
> + if (is_dma_capable() && !musb_ep->dma && musb->dma_controller) {
It is really a bug, any change should not be here, the change does cause
performance regression for usbtest #6.
Reviewed-by: Ming Lei <tom.leiming@xxxxxxxxx>
thanks,
--
Lei Ming
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