From: Beibei Yang <13738176232@163.com>
Subject: [PATCH] usb: xhci: Fix bNbrPorts and wHubCharacteristics  overwritten by another controller

For the `struct descriptor`, only the `hub` part (`bNbrPorts` and `wHubCharacteristics`) is different for each controller, the other five members (device, config, interface, endpoint,ep_companion)are identical for all XHCI root hubs.

Signed-off-by: Beibei Yang <13738176232@163.com>

diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index dbeb88a..1469b3d 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -942,7 +942,7 @@ static int xhci_submit_root(struct usb_device *udev, unsigned long pipe,
 		case USB_DT_HUB:
 		case USB_DT_SS_HUB:
 			debug("USB_DT_HUB config\n");
-			srcptr = &descriptor.hub;
+			srcptr = &ctrl->hub_desc;
 			srclen = 0x8;
 			break;
 		default:
@@ -1203,19 +1203,21 @@ static int xhci_lowlevel_init(struct xhci_ctrl *ctrl)
 		return -ENOMEM;
 
 	reg = xhci_readl(&hccr->cr_hcsparams1);
-	descriptor.hub.bNbrPorts = HCS_MAX_PORTS(reg);
-	printf("Register %x NbrPorts %d\n", reg, descriptor.hub.bNbrPorts);
+	ctrl->hub_desc = descriptor.hub;
+	ctrl->hub_desc.bNbrPorts = ((reg & HCS_MAX_PORTS_MASK) >>
+		HCS_MAX_PORTS_SHIFT);
+	printf("Register %x NbrPorts %d\n", reg, ctrl->hub_desc.bNbrPorts);
 
 	/* Port Indicators */
 	reg = xhci_readl(&hccr->cr_hccparams);
 	if (HCS_INDICATOR(reg))
-		put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics)
-				| 0x80, &descriptor.hub.wHubCharacteristics);
+		put_unaligned(get_unaligned(&ctrl->hub_desc.wHubCharacteristics)
+				| 0x80, &ctrl->hub_desc.wHubCharacteristics);
 
 	/* Port Power Control */
 	if (HCC_PPC(reg))
-		put_unaligned(get_unaligned(&descriptor.hub.wHubCharacteristics)
-				| 0x01, &descriptor.hub.wHubCharacteristics);
+		put_unaligned(get_unaligned(&ctrl->hub_desc.wHubCharacteristics)
+				| 0x01, &ctrl->hub_desc.wHubCharacteristics);
 
 	if (xhci_start(hcor)) {
 		xhci_reset(hcor);
diff --git a/include/usb/xhci.h b/include/usb/xhci.h
index ea4cf3f..9feb3aa 100644
--- a/include/usb/xhci.h
+++ b/include/usb/xhci.h
@@ -22,6 +22,7 @@
 #include <asm/io.h>
 #include <linux/list.h>
 #include <linux/compat.h>
+#include <usb.h>
 
 #define MAX_EP_CTX_NUM		31
 #define XHCI_ALIGNMENT		64
@@ -1214,6 +1215,7 @@ struct xhci_ctrl {
 	struct xhci_erst_entry entry[ERST_NUM_SEGS];
 	struct xhci_scratchpad *scratchpad;
 	struct xhci_virt_device *devs[MAX_HC_SLOTS];
+	struct usb_hub_descriptor hub_desc;
 	int rootdev;
 	u16 hci_version;
 	u32 quirks;