[PATCH 3/6] usb: xhci-mtk: fix ISOC error when interval is zero
From: Chunfeng Yun <chunfeng.yun@mediatek.com>
Date: 2018-08-29 02:56:00
Also in:
linux-arm-kernel, linux-mediatek, linux-usb, lkml
Subsystem:
mediatek usb3 drd ip driver, the rest, usb subsystem, usb xhci driver · Maintainers:
Chunfeng Yun, Linus Torvalds, Greg Kroah-Hartman, Mathias Nyman
If the interval equal zero, needn't round up to power of two for the number of packets in each ESIT, so fix it. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> --- drivers/usb/host/xhci-mtk-sch.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index 46fe0a2..057f453 100644
--- a/drivers/usb/host/xhci-mtk-sch.c
+++ b/drivers/usb/host/xhci-mtk-sch.c@@ -126,7 +126,9 @@ static void setup_sch_info(struct usb_device *udev, } if (ep_type == ISOC_IN_EP || ep_type == ISOC_OUT_EP) { - if (esit_pkts <= sch_ep->esit) + if (sch_ep->esit == 1) + sch_ep->pkts = esit_pkts; + else if (esit_pkts <= sch_ep->esit) sch_ep->pkts = 1; else sch_ep->pkts = roundup_pow_of_two(esit_pkts)
--
1.9.1