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Subject[PATCH AUTOSEL 4.19 184/191] usb: xhci-mtk: fix ISOC error when interval is zero
Date
From: Chunfeng Yun <chunfeng.yun@mediatek.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@mediatek.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.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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