From a0dc613140bab907a3d5787a7ae7b0638bf674d0 Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Thu, 23 Jun 2016 20:28:20 +0200 Subject: [PATCH] usb: xhci: force MSI for uPD720201 and uPD720202 The APM82181 does not support MSI-X. When probed, it will produce a noisy warning. --- drivers/usb/host/pci-quirks.c | 362 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 362 insertions(+) --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -287,6 +287,7 @@ static void xhci_pci_quirks(struct devic pdev->device == 0x0015) { xhci->quirks |= XHCI_RESET_ON_RESUME; xhci->quirks |= XHCI_ZERO_64B_REGS; + xhci->quirks |= XHCI_FORCE_MSI; } if (pdev->vendor == PCI_VENDOR_ID_VIA) xhci->quirks |= XHCI_RESET_ON_RESUME; --- a/drivers/usb/host/xhci.c +++ b/drivers/usb/host/xhci.c @@ -427,10 +427,14 @@ static int xhci_try_enable_msi(struct us free_irq(hcd->irq, hcd); hcd->irq = 0; - ret = xhci_setup_msix(xhci); - if (ret) - /* fall back to msi*/ + if (xhci->quirks & XHCI_FORCE_MSI) { ret = xhci_setup_msi(xhci); + } else { + ret = xhci_setup_msix(xhci); + if (ret) + /* fall back to msi*/ + ret = xhci_setup_msi(xhci); + } if (!ret) { hcd->msi_enabled = 1; --- a/drivers/usb/host/xhci.h +++ b/drivers/usb/host/xhci.h @@ -1896,6 +1896,7 @@ struct xhci_hcd { struct xhci_hub usb2_rhub; struct xhci_hub usb3_rhub; /* support xHCI 1.0 spec USB2 hardware LPM */ +#define XHCI_FORCE_MSI (1 << 24) unsigned hw_lpm_support:1; /* Broken Suspend flag for SNPS Suspend resume issue */ unsigned broken_suspend:1;