diff options
| author |   Martin Fuzzey <mfuzzey@gmail.com> | 2010-10-01 00:21:55 +0200 |
|---|---|---|
| committer |   Greg Kroah-Hartman <gregkh@suse.de> | 2010-10-22 10:22:03 -0700 |
| commit | 1dae423dd9b247b048eda00cb598c755e5933213 (patch) | |
| tree | 8c26248225009634cdff99a53bdb7e5e03b54de9 /drivers/usb | |
| parent | USB: imx21-hcd: Fix isochronous endpoint idle (diff) | |
| download | linux-dev-1dae423dd9b247b048eda00cb598c755e5933213.tar.xz linux-dev-1dae423dd9b247b048eda00cb598c755e5933213.zip | |
USB: introduce unmap_urb_setup_for_dma()
Split unmap_urb_for_dma() to allow just the setup buffer
to be unmapped. This allows HCDs to use PIO for the setup
buffer if it is not suitable for DMA.
Signed-off-by: Martin Fuzzey <mfuzzey@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/usb')
| -rw-r--r-- | drivers/usb/core/hcd.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/usb/core/hcd.c b/drivers/usb/core/hcd.c index cb2d894321da..61800f77dac8 100644 --- a/drivers/usb/core/hcd.c +++ b/drivers/usb/core/hcd.c @@ -1263,10 +1263,8 @@ static void hcd_free_coherent(struct usb_bus *bus, dma_addr_t *dma_handle, *dma_handle = 0; } -void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) +void unmap_urb_setup_for_dma(struct usb_hcd *hcd, struct urb *urb) { - enum dma_data_direction dir; - if (urb->transfer_flags & URB_SETUP_MAP_SINGLE) dma_unmap_single(hcd->self.controller, urb->setup_dma, @@ -1279,6 +1277,17 @@ void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) sizeof(struct usb_ctrlrequest), DMA_TO_DEVICE); + /* Make it safe to call this routine more than once */ + urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL); +} +EXPORT_SYMBOL_GPL(unmap_urb_setup_for_dma); + +void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) +{ + enum dma_data_direction dir; + + unmap_urb_setup_for_dma(hcd, urb); + dir = usb_urb_dir_in(urb) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; if (urb->transfer_flags & URB_DMA_MAP_SG) dma_unmap_sg(hcd->self.controller, @@ -1303,8 +1312,7 @@ void unmap_urb_for_dma(struct usb_hcd *hcd, struct urb *urb) dir); /* Make it safe to call this routine more than once */ - urb->transfer_flags &= ~(URB_SETUP_MAP_SINGLE | URB_SETUP_MAP_LOCAL | - URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | + urb->transfer_flags &= ~(URB_DMA_MAP_SG | URB_DMA_MAP_PAGE | URB_DMA_MAP_SINGLE | URB_MAP_LOCAL); } EXPORT_SYMBOL_GPL(unmap_urb_for_dma); |