xhci: get rid of XHCI_PLAT quirk that used to prevent MSI setup

The XHCI_PLAT quirk was only needed to ensure non-PCI xHC host avoided
setting up MSI interrupts in generic xhci codepaths.

The MSI setup code is now moved to PCI specific xhci-pci.c file so
the quirk is no longer needed.

Remove setting the XHCI_PLAT quirk for HiSilocon SoC xHC, NVIDIA Tegra xHC,
MediaTek xHC, the generic xhci-plat driver, and the checks for XHCI_PLAT
in xhci-pci.c MSI setup code.
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Message-ID: <20230602144009.1225632-5-mathias.nyman@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/xhci-histb.c

@@ -164,16 +164,6 @@ static void xhci_histb_host_disable(struct xhci_hcd_histb *histb)
 	clk_disable_unprepare(histb->bus_clk);
 }
 
-static void xhci_histb_quirks(struct device *dev, struct xhci_hcd *xhci)
-{
-	/*
-	 * As of now platform drivers don't provide MSI support so we ensure
-	 * here that the generic code does not try to make a pci_dev from our
-	 * dev struct in order to setup MSI
-	 */
-	xhci->quirks |= XHCI_PLAT;
-}
-
 /* called during probe() after chip reset completes */
 static int xhci_histb_setup(struct usb_hcd *hcd)
 {
@@ -186,7 +176,7 @@ static int xhci_histb_setup(struct usb_hcd *hcd)
 			return ret;
 	}
 
-	return xhci_gen_setup(hcd, xhci_histb_quirks);
+	return xhci_gen_setup(hcd, NULL);
 }
 
 static const struct xhci_driver_overrides xhci_histb_overrides __initconst = {

drivers/usb/host/xhci-mtk.c

@@ -418,12 +418,6 @@ static void xhci_mtk_quirks(struct device *dev, struct xhci_hcd *xhci)
 	struct usb_hcd *hcd = xhci_to_hcd(xhci);
 	struct xhci_hcd_mtk *mtk = hcd_to_mtk(hcd);
 
-	/*
-	 * As of now platform drivers don't provide MSI support so we ensure
-	 * here that the generic code does not try to make a pci_dev from our
-	 * dev struct in order to setup MSI
-	 */
-	xhci->quirks |= XHCI_PLAT;
 	xhci->quirks |= XHCI_MTK_HOST;
 	/*
 	 * MTK host controller gives a spurious successful event after a

drivers/usb/host/xhci-pci.c

@@ -108,9 +108,6 @@ static void xhci_cleanup_msix(struct xhci_hcd *xhci)
 	struct usb_hcd *hcd = xhci_to_hcd(xhci);
 	struct pci_dev *pdev = to_pci_dev(hcd->self.controller);
 
-	if (xhci->quirks & XHCI_PLAT)
-		return;
-
 	/* return if using legacy interrupt */
 	if (hcd->irq > 0)
 		return;
@@ -208,10 +205,6 @@ static int xhci_try_enable_msi(struct usb_hcd *hcd)
 	struct pci_dev  *pdev;
 	int ret;
 
-	/* The xhci platform device has set up IRQs through usb_add_hcd. */
-	if (xhci->quirks & XHCI_PLAT)
-		return 0;
-
 	pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller);
 	/*
 	 * Some Fresco Logic host controllers advertise MSI, but fail to

drivers/usb/host/xhci-plat.c

@@ -78,12 +78,7 @@ static void xhci_plat_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
 	struct xhci_plat_priv *priv = xhci_to_priv(xhci);
 
-	/*
-	 * As of now platform drivers don't provide MSI support so we ensure
-	 * here that the generic code does not try to make a pci_dev from our
-	 * dev struct in order to setup MSI
-	 */
-	xhci->quirks |= XHCI_PLAT | priv->quirks;
+	xhci->quirks |= priv->quirks;
 }
 
 /* called during probe() after chip reset completes */

drivers/usb/host/xhci-tegra.c

@@ -2663,7 +2663,6 @@ static void tegra_xhci_quirks(struct device *dev, struct xhci_hcd *xhci)
 {
 	struct tegra_xusb *tegra = dev_get_drvdata(dev);
 
-	xhci->quirks |= XHCI_PLAT;
 	if (tegra && tegra->soc->lpm_support)
 		xhci->quirks |= XHCI_LPM_SUPPORT;
 }

drivers/usb/host/xhci.h

@@ -1874,7 +1874,7 @@ struct xhci_hcd {
 #define XHCI_SPURIOUS_REBOOT	BIT_ULL(13)
 #define XHCI_COMP_MODE_QUIRK	BIT_ULL(14)
 #define XHCI_AVOID_BEI		BIT_ULL(15)
-#define XHCI_PLAT		BIT_ULL(16)
+#define XHCI_PLAT		BIT_ULL(16) /* Deprecated */
 #define XHCI_SLOW_SUSPEND	BIT_ULL(17)
 #define XHCI_SPURIOUS_WAKEUP	BIT_ULL(18)
 /* For controllers with a broken beyond repair streams implementation */