diff mbox series

[v2,3/3] usb: xhci-mtk: use first-fit for LS/FS

Message ID 20210506063116.41757-3-chunfeng.yun@mediatek.com (mailing list archive)
State New, archived
Headers show
Series [v2,1/3] usb: xhci-mtk: use bitfield instead of bool | expand

Commit Message

Chunfeng Yun (云春峰) May 6, 2021, 6:31 a.m. UTC 
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>
---
v2: no changes
---
 drivers/usb/host/xhci-mtk-sch.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

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;
 	}