| Message ID | 20210507021127.54717-4-chunfeng.yun@mediatek.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3,1/4] usb: xhci-mtk: use bitfield instead of bool | expand |
On Fri, May 7, 2021 at 10:11 AM Chunfeng Yun <chunfeng.yun@mediatek.com> wrote: > > Use first-fit instead of best-fit for LS/FS devices under TT, > we found that best-fit will consume more bandwidth for some > cases. > > Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Reviewed-and-Tested-by: Ikjoon Jang <ikjn@chromium.org> > --- > v3: no changes > --- > drivers/usb/host/xhci-mtk-sch.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c > index 9fb75085e40f..c07411d9b16f 100644 > --- a/drivers/usb/host/xhci-mtk-sch.c > +++ b/drivers/usb/host/xhci-mtk-sch.c > @@ -634,6 +634,11 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw, > min_bw = worst_bw; > min_index = offset; > } > + > + /* use first-fit for LS/FS */ > + if (sch_ep->sch_tt && min_index >= 0) > + break; > + > if (min_bw == 0) > break; > } > -- > 2.18.0 >
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c index 9fb75085e40f..c07411d9b16f 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -634,6 +634,11 @@ static int check_sch_bw(struct mu3h_sch_bw_info *sch_bw, min_bw = worst_bw; min_index = offset; } + + /* use first-fit for LS/FS */ + if (sch_ep->sch_tt && min_index >= 0) + break; + if (min_bw == 0) break; }
Use first-fit instead of best-fit for LS/FS devices under TT, we found that best-fit will consume more bandwidth for some cases. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- v3: no changes --- drivers/usb/host/xhci-mtk-sch.c | 5 +++++ 1 file changed, 5 insertions(+)