From: Bin Meng <bmeng.cn@gmail.com>
Date: Mon, 18 Sep 2017 13:40:46 +0000 (-0700)
Subject: usb: hub: Clear BH reset status change for a 3.0 hub
X-Git-Tag: v2017.11-rc1~2^2~6
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=061895fbe57d29f50bb3c6c8609d56a668d1387d;p=platform%2Fkernel%2Fu-boot.git

usb: hub: Clear BH reset status change for a 3.0 hub

USB 3.0 hubs report bit[5] in the port status change response as BH
reset. The hub shall set the C_BH_PORT_RESET field for this port.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
---

diff --git a/common/usb_hub.c b/common/usb_hub.c
index a9d21bc..325d16d 100644
--- a/common/usb_hub.c
+++ b/common/usb_hub.c
@@ -494,6 +494,12 @@ static int usb_scan_port(struct usb_device_scan *usb_scan)
 		usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
 	}
 
+	if ((portchange & USB_SS_PORT_STAT_C_BH_RESET) &&
+	    usb_hub_is_superspeed(dev)) {
+		debug("port %d BH reset change\n", i + 1);
+		usb_clear_port_feature(dev, i + 1, USB_SS_PORT_FEAT_C_BH_RESET);
+	}
+
 	/* A new USB device is ready at this point */
 	debug("devnum=%d port=%d: USB dev found\n", dev->devnum, i + 1);