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

From: Greg Kroah-Hartman
Date: Tue Sep 13 2022 - 11:25:24 EST


From: Mathias Nyman <mathias.nyman@xxxxxxxxxxxxxxx>

[ 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@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20220825150840.132216-4-mathias.nyman@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
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