xhci: Call MSI sync function from xhci-pci instead of generic xhci code

Call function to sync MSI interrupts from pci specific xhci_pci_suspend()
function in xhci-pci.c instead of from generic xhci_suspend()

[commit message rewording -Mathias]
Signed-off-by: Josue David Hernandez Gutierrez <josue.d.hernandez.gutierrez@intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230317154715.535523-14-mathias.nyman@linux.intel.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-pci.c

@@ -779,6 +779,7 @@ static void xhci_sparse_control_quirk(struct usb_hcd *hcd)
 	writel(reg, hcd->regs + SPARSE_CNTL_ENABLE);
 }
 
+extern void xhci_msix_sync_irqs(struct xhci_hcd *xhci);
 static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 {
 	struct xhci_hcd	*xhci = hcd_to_xhci(hcd);
@@ -802,6 +803,10 @@ static int xhci_pci_suspend(struct usb_hcd *hcd, bool do_wakeup)
 		xhci_sparse_control_quirk(hcd);
 
 	ret = xhci_suspend(xhci, do_wakeup);
+
+	/* synchronize irq when using MSI-X */
+	xhci_msix_sync_irqs(xhci);
+
 	if (ret && (xhci->quirks & XHCI_SSIC_PORT_UNUSED))
 		xhci_ssic_port_unused_quirk(hcd, false);
 

drivers/usb/host/xhci.c

@@ -320,7 +320,7 @@ static int xhci_disable_interrupter(struct xhci_interrupter *ir)
 
 #ifdef CONFIG_USB_PCI
 
-static void __maybe_unused xhci_msix_sync_irqs(struct xhci_hcd *xhci)
+void xhci_msix_sync_irqs(struct xhci_hcd *xhci)
 {
 	struct usb_hcd *hcd = xhci_to_hcd(xhci);
 
@@ -332,6 +332,7 @@ static void __maybe_unused xhci_msix_sync_irqs(struct xhci_hcd *xhci)
 			synchronize_irq(pci_irq_vector(pdev, i));
 	}
 }
+EXPORT_SYMBOL_GPL(xhci_msix_sync_irqs);
 
 #else
 
@@ -969,10 +970,6 @@ int xhci_suspend(struct xhci_hcd *xhci, bool do_wakeup)
 				__func__);
 	}
 
-	/* step 5: remove core well power */
-	/* synchronize irq when using MSI-X */
-	xhci_msix_sync_irqs(xhci);
-
 	return rc;
 }
 EXPORT_SYMBOL_GPL(xhci_suspend);