diff options
| -rw-r--r-- | drivers/usb/core/hcd.c | 4 | ||||
| -rw-r--r-- | drivers/usb/core/urb.c | 18 | ||||
| -rw-r--r-- | include/linux/usb.h | 30 |
3 files changed, 48 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) diff --git a/include/linux/usb.h b/include/linux/usb.h index 818a1b4f737..9d08f5a5ba7 100644 --- a/include/linux/usb.h +++ b/include/linux/usb.h @@ -1021,6 +1021,8 @@ extern int usb_disabled(void); /* * urb->transfer_flags: + * + * Note: URB_DIR_IN/OUT is automatically set in usb_submit_urb(). */ #define URB_SHORT_NOT_OK 0x0001 /* report short reads as errors */ #define URB_ISO_ASAP 0x0002 /* iso-only, urb->start_frame @@ -1033,6 +1035,10 @@ extern int usb_disabled(void); * needed */ #define URB_FREE_BUFFER 0x0100 /* Free transfer buffer with the URB */ +#define URB_DIR_IN 0x0200 /* Transfer from device to host */ +#define URB_DIR_OUT 0 +#define URB_DIR_MASK URB_DIR_IN + struct usb_iso_packet_descriptor { unsigned int offset; unsigned int length; /* expected length */ @@ -1380,6 +1386,30 @@ extern void usb_unanchor_urb(struct urb *urb); extern int usb_wait_anchor_empty_timeout(struct usb_anchor *anchor, unsigned int timeout); +/** + * usb_urb_dir_in - check if an URB describes an IN transfer + * @urb: URB to be checked + * + * Returns 1 if @urb describes an IN transfer (device-to-host), + * otherwise 0. + */ +static inline int usb_urb_dir_in(struct urb *urb) +{ + return (urb->transfer_flags & URB_DIR_MASK) != URB_DIR_OUT; +} + +/** + * usb_urb_dir_out - check if an URB describes an OUT transfer + * @urb: URB to be checked + * + * Returns 1 if @urb describes an OUT transfer (host-to-device), + * otherwise 0. + */ +static inline int usb_urb_dir_out(struct urb *urb) +{ + return (urb->transfer_flags & URB_DIR_MASK) == URB_DIR_OUT; +} + void *usb_buffer_alloc (struct usb_device *dev, size_t size, gfp_t mem_flags, dma_addr_t *dma); void usb_buffer_free (struct usb_device *dev, size_t size, |