diff options
Diffstat (limited to 'drivers/usb/core/hcd.c')
| -rw-r--r-- | drivers/usb/core/hcd.c | 50 |
1 files changed, 22 insertions, 28 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index f225eaa98ff8..aa45840d8273 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1409,11 +1409,18 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, if (usb_endpoint_xfer_control(&urb->ep->desc)) { if (hcd->self.uses_pio_for_control) return ret; - if (hcd_uses_dma(hcd)) { - if (is_vmalloc_addr(urb->setup_packet)) { - WARN_ONCE(1, "setup packet is not dma capable\n"); - return -EAGAIN; - } else if (object_is_on_stack(urb->setup_packet)) { + if (hcd->localmem_pool) { + ret = hcd_alloc_coherent( + urb->dev->bus, mem_flags, + &urb->setup_dma, + (void **)&urb->setup_packet, + sizeof(struct usb_ctrlrequest), + DMA_TO_DEVICE); + if (ret) + return ret; + urb->transfer_flags |= URB_SETUP_MAP_LOCAL; + } else if (hcd_uses_dma(hcd)) { + if (object_is_on_stack(urb->setup_packet)) { WARN_ONCE(1, "setup packet is on stack\n"); return -EAGAIN; } @@ -1427,23 +1434,22 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, urb->setup_dma)) return -EAGAIN; urb->transfer_flags |= URB_SETUP_MAP_SINGLE; - } else if (hcd->localmem_pool) { - ret = hcd_alloc_coherent( - urb->dev->bus, mem_flags, - &urb->setup_dma, - (void **)&urb->setup_packet, - sizeof(struct usb_ctrlrequest), - DMA_TO_DEVICE); - if (ret) - return ret; - urb->transfer_flags |= URB_SETUP_MAP_LOCAL; } } dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; if (urb->transfer_buffer_length != 0 && !(urb->transfer_flags & URB_NO_TRANSFER_DMA_MAP)) { - if (hcd_uses_dma(hcd)) { + if (hcd->localmem_pool) { + ret = hcd_alloc_coherent( + urb->dev->bus, mem_flags, + &urb->transfer_dma, + &urb->transfer_buffer, + urb->transfer_buffer_length, + dir); + if (ret == 0) + urb->transfer_flags |= URB_MAP_LOCAL; + } else if (hcd_uses_dma(hcd)) { if (urb->num_sgs) { int n; @@ -1479,9 +1485,6 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, ret = -EAGAIN; else urb->transfer_flags |= URB_DMA_MAP_PAGE; - } else if (is_vmalloc_addr(urb->transfer_buffer)) { - WARN_ONCE(1, "transfer buffer not dma capable\n"); - ret = -EAGAIN; } else if (object_is_on_stack(urb->transfer_buffer)) { WARN_ONCE(1, "transfer buffer is on stack\n"); ret = -EAGAIN; @@ -1497,15 +1500,6 @@ int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, else urb->transfer_flags |= URB_DMA_MAP_SINGLE; } - } else if (hcd->localmem_pool) { - ret = hcd_alloc_coherent( - urb->dev->bus, mem_flags, - &urb->transfer_dma, - &urb->transfer_buffer, - urb->transfer_buffer_length, - dir); - if (ret == 0) - urb->transfer_flags |= URB_MAP_LOCAL; } if (ret && (urb->transfer_flags & (URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL))) |