diff options
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 47 |
1 files changed, 20 insertions, 27 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index e5058fb26a7..3df538539b4 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -903,17 +903,32 @@ EXPORT_SYMBOL (usb_calc_bus_time); /*-------------------------------------------------------------------------*/ -static void urb_unlink (struct urb *urb) +static void urb_unlink(struct usb_hcd *hcd, struct urb *urb) { unsigned long flags; + int at_root_hub = (urb->dev == hcd->self.root_hub); /* clear all state linking urb to this dev (and hcd) */ - spin_lock_irqsave (&hcd_data_lock, flags); list_del_init (&urb->urb_list); spin_unlock_irqrestore (&hcd_data_lock, flags); -} + if (hcd->self.uses_dma && !at_root_hub) { + if (usb_pipecontrol (urb->pipe) + && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) + dma_unmap_single (hcd->self.controller, urb->setup_dma, + sizeof (struct usb_ctrlrequest), + DMA_TO_DEVICE); + if (urb->transfer_buffer_length != 0 + && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) + dma_unmap_single (hcd->self.controller, + urb->transfer_dma, + urb->transfer_buffer_length, + usb_pipein (urb->pipe) + ? DMA_FROM_DEVICE + : DMA_TO_DEVICE); + } +} /* may be called in any context with a valid urb->dev usecount * caller surrenders "ownership" of urb @@ -1016,7 +1031,7 @@ doit: status = hcd->driver->urb_enqueue (hcd, ep, urb, mem_flags); done: if (unlikely (status)) { - urb_unlink (urb); + urb_unlink(hcd, urb); atomic_dec (&urb->use_count); if (urb->reject) wake_up (&usb_kill_urb_queue); @@ -1400,29 +1415,7 @@ EXPORT_SYMBOL (usb_bus_start_enum); */ void usb_hcd_giveback_urb (struct usb_hcd *hcd, struct urb *urb) { - int at_root_hub; - - at_root_hub = (urb->dev == hcd->self.root_hub); - urb_unlink (urb); - - /* lower level hcd code should use *_dma exclusively if the - * host controller does DMA */ - if (hcd->self.uses_dma && !at_root_hub) { - if (usb_pipecontrol (urb->pipe) - && !(urb->transfer_flags & URB_NO_SETUP_DMA_MAP)) - dma_unmap_single (hcd->self.controller, urb->setup_dma, - sizeof (struct usb_ctrlrequest), - DMA_TO_DEVICE); - if (urb->transfer_buffer_length != 0 - && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) - dma_unmap_single (hcd->self.controller, - urb->transfer_dma, - urb->transfer_buffer_length, - usb_pipein (urb->pipe) - ? DMA_FROM_DEVICE - : DMA_TO_DEVICE); - } - + urb_unlink(hcd, urb); usbmon_urb_complete (&hcd->self, urb); usb_unanchor_urb(urb); |