korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-12-14 06:24:53 +08:00
Code Issues Packages Projects Releases Wiki Activity

usb: core: hcd: use map_urb_for_dma for single step set feature urb

Browse Source 
Use map_urb_for_dma() to improve the dma map code for single step
set feature request urb in test mode.

Signed-off-by: Li Jun <jun.li@nxp.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Link: https://lore.kernel.org/r/1620452039-11694-3-git-send-email-jun.li@nxp.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Li Jun 2021-05-08 13:33:59 +08:00 committed by Greg Kroah-Hartman
parent cbbc07e1e8
commit 216e0e563d
1 changed files with 6 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/usb/core/hcd.c
View File

@ -2159,16 +2159,12 @@ static struct urb *request_single_step_set_feature_urb(
usb_get_urb(urb);
atomic_inc(&urb->use_count);
atomic_inc(&urb->dev->urbnum);
urb->setup_dma = dma_map_single(
hcd->self.sysdev,
urb->setup_packet,
sizeof(struct usb_ctrlrequest),
DMA_TO_DEVICE);
urb->transfer_dma = dma_map_single(
hcd->self.sysdev,
urb->transfer_buffer,
urb->transfer_buffer_length,
DMA_FROM_DEVICE);
if (map_urb_for_dma(hcd, urb, GFP_KERNEL)) {
usb_put_urb(urb);
usb_free_urb(urb);
return NULL;
}
urb->context = done;
return urb;
}