diff options
| author | Alan Stern <stern@rowland.harvard.edu> | 2010-03-05 15:10:17 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-05-20 13:21:31 -0700 |
| commit | 0ede76fcec5415ef82a423a95120286895822e2d (patch) | |
| tree | 61aa2a0b499a0101033c59b8884328bdb31e5956 /drivers/input/misc/cm109.c | |
| parent | 749da5f82fe33ff68dd4aa1a5e35cd9aa6246dab (diff) | |
| download | blackbird-op-linux-0ede76fcec5415ef82a423a95120286895822e2d.tar.gz blackbird-op-linux-0ede76fcec5415ef82a423a95120286895822e2d.zip | |
USB: remove uses of URB_NO_SETUP_DMA_MAP
This patch (as1350) removes all usages of coherent buffers for USB
control-request setup-packet buffers. There's no good reason to
reserve coherent memory for these things; control requests are hardly
ever used in large quantity (the major exception is firmware
transfers, and they aren't time-critical). Furthermore, only seven
drivers used it. We might as well always use streaming DMA mappings
for setup-packet buffers, and remove some extra complexity from
usbcore.
The DMA-mapping portion of hcd.c is currently in flux. A separate
patch will be submitted to remove support for URB_NO_SETUP_DMA_MAP
after everything else settles down. The removal should go smoothly,
as by then nobody will be using it.
Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/input/misc/cm109.c')
| -rw-r--r-- | drivers/input/misc/cm109.c | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/drivers/input/misc/cm109.c b/drivers/input/misc/cm109.c index 86457feccfc4..8d2d291ee508 100644 --- a/drivers/input/misc/cm109.c +++ b/drivers/input/misc/cm109.c @@ -102,7 +102,6 @@ struct cm109_dev { struct cm109_ctl_packet *ctl_data; dma_addr_t ctl_dma; struct usb_ctrlrequest *ctl_req; - dma_addr_t ctl_req_dma; struct urb *urb_ctl; /* * The 3 bitfields below are protected by ctl_submit_lock. @@ -629,9 +628,7 @@ static const struct usb_device_id cm109_usb_table[] = { static void cm109_usb_cleanup(struct cm109_dev *dev) { - if (dev->ctl_req) - usb_buffer_free(dev->udev, sizeof(*(dev->ctl_req)), - dev->ctl_req, dev->ctl_req_dma); + kfree(dev->ctl_req); if (dev->ctl_data) usb_buffer_free(dev->udev, USB_PKT_LEN, dev->ctl_data, dev->ctl_dma); @@ -696,8 +693,7 @@ static int cm109_usb_probe(struct usb_interface *intf, if (!dev->ctl_data) goto err_out; - dev->ctl_req = usb_buffer_alloc(udev, sizeof(*(dev->ctl_req)), - GFP_KERNEL, &dev->ctl_req_dma); + dev->ctl_req = kmalloc(sizeof(*(dev->ctl_req)), GFP_KERNEL); if (!dev->ctl_req) goto err_out; @@ -735,10 +731,8 @@ static int cm109_usb_probe(struct usb_interface *intf, usb_fill_control_urb(dev->urb_ctl, udev, usb_sndctrlpipe(udev, 0), (void *)dev->ctl_req, dev->ctl_data, USB_PKT_LEN, cm109_urb_ctl_callback, dev); - dev->urb_ctl->setup_dma = dev->ctl_req_dma; dev->urb_ctl->transfer_dma = dev->ctl_dma; - dev->urb_ctl->transfer_flags |= URB_NO_SETUP_DMA_MAP | - URB_NO_TRANSFER_DMA_MAP; + dev->urb_ctl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; dev->urb_ctl->dev = udev; /* find out the physical bus location */ |
