Hi,
On Mon, Mar 18, 2013 at 01:50:55PM +0530, kishon wrote:
> >>>@@ -141,7 +141,7 @@ static inline void map_dma_buffer(struct musb_request
> >>>*request,
> >>> static inline void unmap_dma_buffer(struct musb_request *request,
> >>> struct musb *musb)
> >>> {
> >>>- if (!is_buffer_mapped(request))
> >>>+ if (!is_buffer_mapped(request) || !musb_ep->dma)
> >>> return;
> >>>
> >>> if (request->request.dma == DMA_ADDR_INVALID) {
> >>>@@ -195,7 +195,10 @@ __acquires(ep->musb->lock)
> >>>
> >>> ep->busy = 1;
> >>> spin_unlock(&musb->lock);
> >>>- unmap_dma_buffer(req, musb);
> >>>+
> >>>+ if (!dma_mapping_error(request->dma))
> >>
> >>this should have been *dma_mapping_error(&musb->g.dev, request->dma)*
> >
> >indeed :-)
> >
> >>;-) But this doesn't work quite right. The dma_mapping_error
> >>considers only *DMA_ERROR_CODE* as error. Maybe we should have
> >>something like this
> >>
> >>*if (!dma_mapping_error(&musb->g.dev, request->dma) && request->dma)*
> >
> >won't 'is_buffer_mapped()' take care of the second check ?
>
> No, it doesn't. Btw you've removed is_buffer_mapped() macro in *usb:
> musb: gadget: switch over to usb_gadget_map/unmap_request()* patch..I dropped that patch since MUSB needs a bit more care when switching to generic map/unmap routines. We can do that for v3.11 instead. -- balbi
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