6.1-stable review patch. If anyone has any objections, please let me know.
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From: Mathias Nyman mathias.nyman@linux.intel.com
commit f81dfa3b57c624c56f2bff171c431bc7f5b558f2 upstream.
PCI xHC host should be stopped and xhci driver memory freed before putting host to PCI D3 state during PCI remove callback.
Hosts with XHCI_SPURIOUS_WAKEUP quirk did this the wrong way around and set the host to D3 before calling usb_hcd_pci_remove(dev), which will access the host to stop it, and then free xhci.
Fixes: f1f6d9a8b540 ("xhci: don't dereference a xhci member after removing xhci") Cc: stable@vger.kernel.org Signed-off-by: Mathias Nyman mathias.nyman@linux.intel.com Link: https://lore.kernel.org/r/20240905143300.1959279-12-mathias.nyman@linux.inte... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/usb/host/xhci-pci.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
--- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -534,8 +534,10 @@ put_runtime_pm: static void xhci_pci_remove(struct pci_dev *dev) { struct xhci_hcd *xhci; + bool set_power_d3;
xhci = hcd_to_xhci(pci_get_drvdata(dev)); + set_power_d3 = xhci->quirks & XHCI_SPURIOUS_WAKEUP;
xhci->xhc_state |= XHCI_STATE_REMOVING;
@@ -548,11 +550,11 @@ static void xhci_pci_remove(struct pci_d xhci->shared_hcd = NULL; }
+ usb_hcd_pci_remove(dev); + /* Workaround for spurious wakeups at shutdown with HSW */ - if (xhci->quirks & XHCI_SPURIOUS_WAKEUP) + if (set_power_d3) pci_set_power_state(dev, PCI_D3hot); - - usb_hcd_pci_remove(dev); }
#ifdef CONFIG_PM