From 4676be28a46e9b1aef9a1fd24ecc207ebc189c9a Mon Sep 17 00:00:00 2001 From: Chunfeng Yun Date: Fri, 7 May 2021 10:11:27 +0800 Subject: [PATCH] usb: xhci-mtk: use first-fit for LS/FS 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 Link: https://lore.kernel.org/r/20210507021127.54717-4-chunfeng.yun@mediatek.com Signed-off-by: Greg Kroah-Hartman --- 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 9fb7508..c07411d9 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; } -- 2.7.4