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patch "usb: xhci: only set D3hot for pci device" added to usb-linus

PATCH [email protected] 1 participant 1 message Dec 11, 2019

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Stable branch USB USB xHCI driver
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This is a note to let you know that I've just added the patch titled

usb: xhci: only set D3hot for pci device

to my usb git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git
in the usb-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From f2c710f7dca8457e88b4ac9de2060f011254f9dd Mon Sep 17 00:00:00 2001
From: Henry Lin <[email protected]>
Date: Wed, 11 Dec 2019 16:20:04 +0200
Subject: usb: xhci: only set D3hot for pci device

Xhci driver cannot call pci_set_power_state() on non-pci xhci host controllers. For example, NVIDIA Tegra XHCI host controller which acts as platform device with XHCI_SPURIOUS_WAKEUP quirk set in some platform hits this issue during shutdown.

Cc <[email protected]>
Fixes 638298dc66ea ("xhci: Fix spurious wakeups after S5 on Haswell")
Signed-off-by Henry Lin <[email protected]>
Signed-off-by Mathias Nyman <[email protected]>
Link https://lore.kernel.org/r/[email protected] open here
Signed-off-by Greg Kroah-Hartman <[email protected]>
---
 drivers/usb/host/xhci-pci.c | 13 +++++++++++++
 drivers/usb/host/xhci.c     |  7 ++-----
 drivers/usb/host/xhci.h     |  1 +
 3 files changed, 16 insertions(+), 5 deletions(-)
drivers/usb/host/xhci-pci.c +13 -0
index a0025d23b257..2907fe4d78dd 100644
@@ -521,6 +521,18 @@ static int xhci_pci_resume(struct usb_hcd *hcd, bool hibernated)
 }
 #endif /* CONFIG_PM */
 
+static void xhci_pci_shutdown(struct usb_hcd *hcd)
+{
+	struct xhci_hcd		*xhci = hcd_to_xhci(hcd);
+	struct pci_dev		*pdev = to_pci_dev(hcd->self.controller);
+
+	xhci_shutdown(hcd);
+
+	/* Yet another workaround for spurious wakeups at shutdown with HSW */
+	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
+		pci_set_power_state(pdev, PCI_D3hot);
+}
+
 /*-------------------------------------------------------------------------*/
 
 /* PCI driver selection metadata; PCI hotplugging uses this */

@@ -556,6 +568,7 @@ static int __init xhci_pci_init(void)
 #ifdef CONFIG_PM
 	xhci_pci_hc_driver.pci_suspend = xhci_pci_suspend;
 	xhci_pci_hc_driver.pci_resume = xhci_pci_resume;
+	xhci_pci_hc_driver.shutdown = xhci_pci_shutdown;
 #endif
 	return pci_register_driver(&xhci_pci_driver);
 }
drivers/usb/host/xhci.c +2 -5
index 6721d059f58a..c5ee562c4c74 100644
@@ -770,7 +770,7 @@ static void xhci_stop(struct usb_hcd *hcd)
  *
  * This will only ever be called with the main usb_hcd (the USB3 roothub).
  */
-static void xhci_shutdown(struct usb_hcd *hcd)
+void xhci_shutdown(struct usb_hcd *hcd)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
 

@@ -789,11 +789,8 @@ static void xhci_shutdown(struct usb_hcd *hcd)
 	xhci_dbg_trace(xhci, trace_xhci_dbg_init,
 			"xhci_shutdown completed - status = %x",
 			readl(&xhci->op_regs->status));
-
-	/* Yet another workaround for spurious wakeups at shutdown with HSW */
-	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
-		pci_set_power_state(to_pci_dev(hcd->self.sysdev), PCI_D3hot);
 }
+EXPORT_SYMBOL_GPL(xhci_shutdown);
 
 #ifdef CONFIG_PM
 static void xhci_save_registers(struct xhci_hcd *xhci)
drivers/usb/host/xhci.h +1 -0
index dc6f62a4b197..13d8838cd552 100644
@@ -2050,6 +2050,7 @@ int xhci_start(struct xhci_hcd *xhci);
 int xhci_reset(struct xhci_hcd *xhci);
 int xhci_run(struct usb_hcd *hcd);
 int xhci_gen_setup(struct usb_hcd *hcd, xhci_get_quirks_t get_quirks);
+void xhci_shutdown(struct usb_hcd *hcd);
 void xhci_init_driver(struct hc_driver *drv,
 		      const struct xhci_driver_overrides *over);
 int xhci_disable_slot(struct xhci_hcd *xhci, u32 slot_id);
Signature · 1 line
2.24.1