[PATCH 4.19 13/79] Revert "xhci: turn off port power in shutdown" - Greg Kroah-Hartman

From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org,
	Mathias Nyman <mathias.nyman@linux.intel.com>,
	Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 13/79] Revert "xhci: turn off port power in shutdown"
Date: Tue, 13 Sep 2022 16:06:31 +0200	[thread overview]
Message-ID: <20220913140349.496982808@linuxfoundation.org> (raw)
In-Reply-To: <20220913140348.835121645@linuxfoundation.org>

From: Mathias Nyman <mathias.nyman@linux.intel.com>

[ Upstream commit 8531aa1659f7278d4f2ec7408cc000eaa8d85217 ]

This reverts commit 83810f84ecf11dfc5a9414a8b762c3501b328185.

Turning off port power in shutdown did cause issues such as a laptop not
proprly powering off, and some specific usb devies failing to enumerate the
subsequent boot after a warm reset.

So revert this.

Fixes: 83810f84ecf1 ("xhci: turn off port power in shutdown")
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20220825150840.132216-4-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/host/xhci-hub.c |  2 +-
 drivers/usb/host/xhci.c     | 15 ++-------------
 drivers/usb/host/xhci.h     |  2 --
 3 files changed, 3 insertions(+), 16 deletions(-)

diff --git a/drivers/usb/host/xhci-hub.c b/drivers/usb/host/xhci-hub.c
index e40370ed7d8a5..1bb48e53449e6 100644
--- a/drivers/usb/host/xhci-hub.c
+++ b/drivers/usb/host/xhci-hub.c
@@ -565,7 +565,7 @@ struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd)
  * It will release and re-aquire the lock while calling ACPI
  * method.
  */
-void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd,
+static void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd,
 				u16 index, bool on, unsigned long *flags)
 {
 	struct xhci_hub *rhub;
diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
index 677587479d260..a9e72fee87a77 100644
--- a/drivers/usb/host/xhci.c
+++ b/drivers/usb/host/xhci.c
@@ -774,8 +774,6 @@ static void xhci_stop(struct usb_hcd *hcd)
 void xhci_shutdown(struct usb_hcd *hcd)
 {
 	struct xhci_hcd *xhci = hcd_to_xhci(hcd);
-	unsigned long flags;
-	int i;
 
 	if (xhci->quirks & XHCI_SPURIOUS_REBOOT)
 		usb_disable_xhci_ports(to_pci_dev(hcd->self.sysdev));
@@ -791,21 +789,12 @@ void xhci_shutdown(struct usb_hcd *hcd)
 		del_timer_sync(&xhci->shared_hcd->rh_timer);
 	}
 
-	spin_lock_irqsave(&xhci->lock, flags);
+	spin_lock_irq(&xhci->lock);
 	xhci_halt(xhci);
-
-	/* Power off USB2 ports*/
-	for (i = 0; i < xhci->usb2_rhub.num_ports; i++)
-		xhci_set_port_power(xhci, xhci->main_hcd, i, false, &flags);
-
-	/* Power off USB3 ports*/
-	for (i = 0; i < xhci->usb3_rhub.num_ports; i++)
-		xhci_set_port_power(xhci, xhci->shared_hcd, i, false, &flags);
-
 	/* Workaround for spurious wakeups at shutdown with HSW */
 	if (xhci->quirks & XHCI_SPURIOUS_WAKEUP)
 		xhci_reset(xhci, XHCI_RESET_SHORT_USEC);
-	spin_unlock_irqrestore(&xhci->lock, flags);
+	spin_unlock_irq(&xhci->lock);
 
 	xhci_cleanup_msix(xhci);
 
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index 3b29dfc6f79e3..3e6cb257fde5a 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -2145,8 +2145,6 @@ int xhci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue, u16 wIndex,
 int xhci_hub_status_data(struct usb_hcd *hcd, char *buf);
 int xhci_find_raw_port_number(struct usb_hcd *hcd, int port1);
 struct xhci_hub *xhci_get_rhub(struct usb_hcd *hcd);
-void xhci_set_port_power(struct xhci_hcd *xhci, struct usb_hcd *hcd, u16 index,
-			 bool on, unsigned long *flags);
 
 void xhci_hc_died(struct xhci_hcd *xhci);
 
-- 
2.35.1



