shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

UPSTREAM: usb: dwc3: gadget: Don't prepare TRBs if no space

Browse Source 
If trbs_left == 0, we don't have any space left in the TRB ring so don't
prepare anything.

Change-Id: I1dc6c665b778a7988fca9cd890884ad27dc830ef
Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Signed-off-by: Wu Liang feng <wulf@rock-chips.com>
(cherry picked from commit 89bc856e5a)
This commit is contained in:
John Youn
2016-05-19 17:26:10 -07:00
committed by Huang, Tao
parent 39298655f8
commit f906253bf0
1 changed files with 2 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/usb/dwc3/gadget.c
View File

@@ -942,6 +942,8 @@ static void dwc3_prepare_trbs(struct dwc3_ep *dep)
BUILD_BUG_ON_NOT_POWER_OF_2(DWC3_TRB_NUM);
trbs_left = dwc3_calc_trbs_left(dep);
if (!trbs_left)
return;
list_for_each_entry_safe(req, n, &dep->pending_list, list) {
if (req->request.num_mapped_sgs > 0)