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/hid/usbhid/hid-core.c | |
| parent | 749da5f82fe33ff68dd4aa1a5e35cd9aa6246dab (diff) | |
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/hid/usbhid/hid-core.c')
| -rw-r--r-- | drivers/hid/usbhid/hid-core.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/hid/usbhid/hid-core.c b/drivers/hid/usbhid/hid-core.c index 7b85b696fda..6a510c9675f 100644 --- a/drivers/hid/usbhid/hid-core.c +++ b/drivers/hid/usbhid/hid-core.c @@ -787,8 +787,7 @@ static int hid_alloc_buffers(struct usb_device *dev, struct hid_device *hid) &usbhid->inbuf_dma); usbhid->outbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, &usbhid->outbuf_dma); - usbhid->cr = usb_buffer_alloc(dev, sizeof(*usbhid->cr), GFP_KERNEL, - &usbhid->cr_dma); + usbhid->cr = kmalloc(sizeof(*usbhid->cr), GFP_KERNEL); usbhid->ctrlbuf = usb_buffer_alloc(dev, usbhid->bufsize, GFP_KERNEL, &usbhid->ctrlbuf_dma); if (!usbhid->inbuf || !usbhid->outbuf || !usbhid->cr || @@ -846,7 +845,7 @@ static void hid_free_buffers(struct usb_device *dev, struct hid_device *hid) usb_buffer_free(dev, usbhid->bufsize, usbhid->inbuf, usbhid->inbuf_dma); usb_buffer_free(dev, usbhid->bufsize, usbhid->outbuf, usbhid->outbuf_dma); - usb_buffer_free(dev, sizeof(*(usbhid->cr)), usbhid->cr, usbhid->cr_dma); + kfree(usbhid->cr); usb_buffer_free(dev, usbhid->bufsize, usbhid->ctrlbuf, usbhid->ctrlbuf_dma); } @@ -1007,9 +1006,8 @@ static int usbhid_start(struct hid_device *hid) usb_fill_control_urb(usbhid->urbctrl, dev, 0, (void *) usbhid->cr, usbhid->ctrlbuf, 1, hid_ctrl, hid); - usbhid->urbctrl->setup_dma = usbhid->cr_dma; usbhid->urbctrl->transfer_dma = usbhid->ctrlbuf_dma; - usbhid->urbctrl->transfer_flags |= (URB_NO_TRANSFER_DMA_MAP | URB_NO_SETUP_DMA_MAP); + usbhid->urbctrl->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; if (!(hid->quirks & HID_QUIRK_NO_INIT_REPORTS)) usbhid_init_reports(hid); |