From 0ede76fcec5415ef82a423a95120286895822e2d Mon Sep 17 00:00:00 2001 From: Alan Stern Date: Fri, 5 Mar 2010 15:10:17 -0500 Subject: USB: remove uses of URB_NO_SETUP_DMA_MAP This patch (as1350) removes all usages of coherent buffers for USB control-request setup-packet buffers. There's no good reason to reserve coherent memory for these things; control requests are hardly ever used in large quantity (the major exception is firmware transfers, and they aren't time-critical). Furthermore, only seven drivers used it. We might as well always use streaming DMA mappings for setup-packet buffers, and remove some extra complexity from usbcore. The DMA-mapping portion of hcd.c is currently in flux. A separate patch will be submitted to remove support for URB_NO_SETUP_DMA_MAP after everything else settles down. The removal should go smoothly, as by then nobody will be using it. Signed-off-by: Alan Stern Signed-off-by: Greg Kroah-Hartman --- drivers/usb/storage/transport.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'drivers/usb/storage/transport.c') diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c index f253edec3bb8..44716427c51c 100644 --- a/drivers/usb/storage/transport.c +++ b/drivers/usb/storage/transport.c @@ -147,11 +147,9 @@ static int usb_stor_msg_common(struct us_data *us, int timeout) * hasn't been mapped for DMA. Yes, this is clunky, but it's * easier than always having the caller tell us whether the * transfer buffer has already been mapped. */ - us->current_urb->transfer_flags = URB_NO_SETUP_DMA_MAP; if (us->current_urb->transfer_buffer == us->iobuf) us->current_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; us->current_urb->transfer_dma = us->iobuf_dma; - us->current_urb->setup_dma = us->cr_dma; /* submit the URB */ status = usb_submit_urb(us->current_urb, GFP_NOIO); -- cgit v1.2.3