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From:   Chunfeng Yun <chunfeng.yun@mediatek.com>
To:     Mathias Nyman <mathias.nyman@intel.com>
CC:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Felipe Balbi <felipe.balbi@linux.intel.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Alan Stern <stern@rowland.harvard.edu>,
        Chunfeng Yun <chunfeng.yun@mediatek.com>,
        <linux-usb@vger.kernel.org>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-mediatek@lists.infradead.org>
Subject: [PATCH 3/6] usb: xhci-mtk: fix ISOC error when interval is zero
Date:   Wed, 29 Aug 2018 10:55:15 +0800
Message-ID: <0c4244695d4dd8bf9cb1d2d0291783974c56ff7a.1535510898.git.chunfeng.yun@mediatek.com>
In-Reply-To: <3bcc220aa54bfebc39cea54cd736388ad37ee0c5.1535510898.git.chunfeng.yun@mediatek.com>
References: <3bcc220aa54bfebc39cea54cd736388ad37ee0c5.1535510898.git.chunfeng.yun@mediatek.com>
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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