usb: xhci-mtk: fix ISOC error when interval is zero

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>

diff --git a/drivers/usb/host/xhci-mtk-sch.c b/drivers/usb/host/xhci-mtk-sch.c
index 46fe0a200ca7d03c62ec7a1187e5383782860ac7..057f453e06c5c8aa3f366f54e9a61f455e2112be 100644 (file)
--- 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)