On Tue, 24 Aug 2010, Maulik Mankad wrote: > The USB stack maps the buffer for DMA if the controller supports DMA. > MUSB controller can perform DMA as well as PIO transfers. > The buffer needs to be unmapped before CPU can perform > PIO data transfers. > > Export unmap_urb_for_dma() so that drivers can perform > the DMA unmapping in a sane way. > > Signed-off-by: Maulik Mankad <x0082077@xxxxxx> > Cc: Felipe Balbi <felipe.balbi@xxxxxxxxx> > Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> > --- > Based on 2.6.36-rc1 > V4: Fix Alan's comments. > drivers/usb/core/hcd.c | 3 ++- > drivers/usb/musb/musb_host.c | 5 +++++ > include/linux/usb/hcd.h | 1 + > 3 files changed, 8 insertions(+), 1 deletion(-) Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
