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- From a0dc613140bab907a3d5787a7ae7b0638bf674d0 Mon Sep 17 00:00:00 2001
- From: Christian Lamparter <[email protected]>
- 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
- @@ -215,6 +215,7 @@ 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
- @@ -424,10 +424,14 @@ 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
- @@ -1867,6 +1867,7 @@ struct xhci_hcd {
- /* support xHCI 0.96 spec USB2 software LPM */
- unsigned sw_lpm_support:1;
- /* 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;
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