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58 lines
1.8 KiB
Diff
58 lines
1.8 KiB
Diff
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From a0dc613140bab907a3d5787a7ae7b0638bf674d0 Mon Sep 17 00:00:00 2001
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From: Christian Lamparter <chunkeey@gmail.com>
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Date: Thu, 23 Jun 2016 20:28:20 +0200
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Subject: [PATCH] usb: xhci: force MSI for uPD720201 and
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uPD720202
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The APM82181 does not support MSI-X. When probed, it will
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produce a noisy warning.
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---
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drivers/usb/host/pci-quirks.c | 362 ++++++++++++++++++++++++++++++++++++++++++
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1 file changed, 362 insertions(+)
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diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
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index 1c4d89e..555bd3f 100644
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--- a/drivers/usb/host/xhci-pci.c
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+++ b/drivers/usb/host/xhci-pci.c
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@@ -172,7 +172,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
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}
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if (pdev->vendor == PCI_VENDOR_ID_RENESAS &&
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pdev->device == 0x0015)
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- xhci->quirks |= XHCI_RESET_ON_RESUME;
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+ xhci->quirks |= XHCI_RESET_ON_RESUME | XHCI_FORCE_MSI;
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if (pdev->vendor == PCI_VENDOR_ID_VIA)
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xhci->quirks |= XHCI_RESET_ON_RESUME;
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diff --git a/drivers/usb/host/xhci.c b/drivers/usb/host/xhci.c
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index 9e71c96..27cfcb9 100644
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--- a/drivers/usb/host/xhci.c
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+++ b/drivers/usb/host/xhci.c
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@@ -389,10 +389,14 @@ static int xhci_try_enable_msi(struct usb_hcd *hcd)
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free_irq(hcd->irq, hcd);
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hcd->irq = 0;
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- ret = xhci_setup_msix(xhci);
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- if (ret)
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- /* fall back to msi*/
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+ if (xhci->quirks & XHCI_FORCE_MSI) {
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ret = xhci_setup_msi(xhci);
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+ } else {
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+ ret = xhci_setup_msix(xhci);
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+ if (ret)
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+ /* fall back to msi*/
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+ ret = xhci_setup_msi(xhci);
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+ }
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if (!ret)
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/* hcd->irq is 0, we have MSI */
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diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
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index 6b085aa..514dc3f 100644
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--- a/drivers/usb/host/xhci.h
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+++ b/drivers/usb/host/xhci.h
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@@ -1649,3 +1649,4 @@ struct xhci_hcd {
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#define XHCI_BROKEN_STREAMS (1 << 19)
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#define XHCI_PME_STUCK_QUIRK (1 << 20)
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+#define XHCI_FORCE_MSI (1 << 24)
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unsigned int num_active_eps;
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