USB: add direction bit to urb->transfer_flags
This patch (as945) adds a bit to urb->transfer_flags for recording the
direction of the URB. The bit is set/cleared automatically in
usb_submit_urb() so drivers don't have to worry about it (although as
a result, it isn't valid until the URB has been submitted). Inline
routines are added for easily checking an URB's direction. They
replace calls to usb_pipein in the DMA-mapping parts of hcd.c.
For non-control endpoints, the direction is determined directly from
the endpoint descriptor. However control endpoints are
bi-directional; for them the direction is determined from the
bRequestType byte and the wLength value in the setup packet.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index cc5b1d3..bcbaedc 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -928,7 +928,7 @@
dma_unmap_single (hcd->self.controller,
urb->transfer_dma,
urb->transfer_buffer_length,
- usb_pipein (urb->pipe)
+ usb_urb_dir_in(urb)
? DMA_FROM_DEVICE
: DMA_TO_DEVICE);
}
@@ -1014,7 +1014,7 @@
hcd->self.controller,
urb->transfer_buffer,
urb->transfer_buffer_length,
- usb_pipein (urb->pipe)
+ usb_urb_dir_in(urb)
? DMA_FROM_DEVICE
: DMA_TO_DEVICE);
}
