add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/usb/host/xhci.c
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@@ -9,6 +9,9 @@
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  */
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 #include <linux/pci.h>
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+#ifndef __GENKSYMS__	/* ANDROID: KABI CRC preservation hack */
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+#include <linux/iommu.h>
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+#endif
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 #include <linux/iopoll.h>
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 #include <linux/irq.h>
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 #include <linux/log2.h>
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@@ -223,6 +226,7 @@
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 static void xhci_zero_64b_regs(struct xhci_hcd *xhci)
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 {
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 	struct device *dev = xhci_to_hcd(xhci)->self.sysdev;
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+	struct iommu_domain *domain;
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 	int err, i;
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 	u64 val;
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 	u32 intrs;
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@@ -241,7 +245,9 @@
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 	 * an iommu. Doing anything when there is no iommu is definitely
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 	 * unsafe...
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 	 */
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-	if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !device_iommu_mapped(dev))
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+	domain = iommu_get_domain_for_dev(dev);
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+	if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !domain ||
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+	    domain->type == IOMMU_DOMAIN_IDENTITY)
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 		return;
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 	xhci_info(xhci, "Zeroing 64bit base registers, expecting fault\n");
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@@ -692,6 +698,8 @@
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 	}
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 	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
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 			"Finished xhci_run for USB2 roothub");
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+
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+	set_bit(HCD_FLAG_DEFER_RH_REGISTER, &hcd->flags);
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 	xhci_dbc_init(xhci);
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@@ -1258,7 +1266,7 @@
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 		 * the first wake signalling failed, give it that chance.
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 		 */
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 		pending_portevent = xhci_pending_portevent(xhci);
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-		if (!pending_portevent) {
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+		if (!pending_portevent && !IS_ENABLED(CONFIG_ARCH_ROCKCHIP)) {
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 			msleep(120);
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 			pending_portevent = xhci_pending_portevent(xhci);
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 		}
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@@ -3865,6 +3873,7 @@
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 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
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 	struct xhci_virt_device *virt_dev;
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 	struct xhci_slot_ctx *slot_ctx;
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+	unsigned long flags;
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 	int i, ret;
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 	/*
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@@ -3893,7 +3902,11 @@
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 	}
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 	virt_dev->udev = NULL;
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 	xhci_disable_slot(xhci, udev->slot_id);
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+
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+	spin_lock_irqsave(&xhci->lock, flags);
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 	xhci_free_virt_device(xhci, udev->slot_id);
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+	spin_unlock_irqrestore(&xhci->lock, flags);
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+
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 }
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 int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id)