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authorAlan Stern <stern@rowland.harvard.edu>2007-07-30 17:06:16 -0400
committerGreg Kroah-Hartman <gregkh@suse.de>2007-10-12 14:55:00 -0700
commitfea3409112a93581db18da4c4332c8bf8d68af6b (patch)
treec89b9fd9f8a64d2419d7888a6ab135851f4fee38 /drivers/usb/core
parentbdd016ba64d909329cb4bacacc8443901c00e112 (diff)
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>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/hcd.c4
-rw-r--r--drivers/usb/core/urb.c18
2 files changed, 18 insertions, 4 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c
index cc5b1d3c368..bcbaedc897d 100644
--- a/drivers/usb/core/hcd.c
+++ b/drivers/usb/core/hcd.c
@@ -928,7 +928,7 @@ static void urb_unlink(struct usb_hcd *hcd, struct urb *urb)
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 @@ int usb_hcd_submit_urb (struct urb *urb, gfp_t mem_flags)
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);
}
diff --git a/drivers/usb/core/urb.c b/drivers/usb/core/urb.c
index ff53acb4fab..1a64a6a850f 100644
--- a/drivers/usb/core/urb.c
+++ b/drivers/usb/core/urb.c
@@ -309,7 +309,21 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
* and don't need to duplicate tests
*/
xfertype = usb_endpoint_type(&ep->desc);
- is_out = usb_pipeout(urb->pipe);
+ if (xfertype == USB_ENDPOINT_XFER_CONTROL) {
+ struct usb_ctrlrequest *setup =
+ (struct usb_ctrlrequest *) urb->setup_packet;
+
+ if (!setup)
+ return -ENOEXEC;
+ is_out = !(setup->bRequestType & USB_DIR_IN) ||
+ !setup->wLength;
+ } else {
+ is_out = usb_endpoint_dir_out(&ep->desc);
+ }
+
+ /* Cache the direction for later use */
+ urb->transfer_flags = (urb->transfer_flags & ~URB_DIR_MASK) |
+ (is_out ? URB_DIR_OUT : URB_DIR_IN);
if (xfertype != USB_ENDPOINT_XFER_CONTROL &&
dev->state < USB_STATE_CONFIGURED)
@@ -363,7 +377,7 @@ int usb_submit_urb(struct urb *urb, gfp_t mem_flags)
/* enforce simple/standard policy */
allowed = (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP |
- URB_NO_INTERRUPT);
+ URB_NO_INTERRUPT | URB_DIR_MASK);
switch (xfertype) {
case USB_ENDPOINT_XFER_BULK:
if (is_out)