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Date: Sat, 9 Nov 2019 21:40:06 -0500 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Chunfeng Yun <chunfeng.yun@...iatek.com>, Mathias Nyman <mathias.nyman@...ux.intel.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Sasha Levin <sashal@...nel.org>, linux-usb@...r.kernel.org Subject: [PATCH AUTOSEL 4.19 184/191] usb: xhci-mtk: fix ISOC error when interval is zero From: Chunfeng Yun <chunfeng.yun@...iatek.com> [ Upstream commit 87173acc0d8f0987bda8827da35fff67f52ad15d ] 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@...iatek.com> Signed-off-by: Mathias Nyman <mathias.nyman@...ux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Signed-off-by: Sasha Levin <sashal@...nel.org> --- 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 fa33d6e5b1cbd..d04fdd173ed2e 100644 --- a/drivers/usb/host/xhci-mtk-sch.c +++ b/drivers/usb/host/xhci-mtk-sch.c @@ -113,7 +113,9 @@ 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) -- 2.20.1
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