From a795f708b2844054a7d12aae72397bf51d0f87b3 Mon Sep 17 00:00:00 2001 From: Niklas Neronin Date: Fri, 1 Dec 2023 17:06:42 +0200 Subject: [PATCH] xhci: refactor static MSI function The current way the xhci driver sets up MSI interrupts is overly complex and messy. The whole MSI setup can be done in one simple function. Continue refactoring MSI/MSI-X setup by incorporating 'xhci_setup_msi()' into 'xhci_try_enable_msi()'. Now all interrupt enabling is contained in one function, which should make it easier to rework. Signed-off-by: Niklas Neronin Signed-off-by: Mathias Nyman Link: https://lore.kernel.org/r/20231201150647.1307406-15-mathias.nyman@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/host/xhci-pci.c | 49 ++++++++++++------------------------- 1 file changed, 15 insertions(+), 34 deletions(-) diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c index 370943c048815..dbec0a315566d 100644 --- a/drivers/usb/host/xhci-pci.c +++ b/drivers/usb/host/xhci-pci.c @@ -116,35 +116,6 @@ static void xhci_cleanup_msix(struct xhci_hcd *xhci) hcd->msix_enabled = 0; } -/* - * Set up MSI - */ -static int xhci_setup_msi(struct xhci_hcd *xhci) -{ - int ret; - /* - * TODO:Check with MSI Soc for sysdev - */ - struct pci_dev *pdev = to_pci_dev(xhci_to_hcd(xhci)->self.controller); - - ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); - if (ret < 0) { - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "failed to allocate MSI entry"); - return ret; - } - - ret = request_irq(pdev->irq, xhci_msi_irq, - 0, "xhci_hcd", xhci_to_hcd(xhci)); - if (ret) { - xhci_dbg_trace(xhci, trace_xhci_dbg_init, - "disable MSI interrupt"); - pci_free_irq_vectors(pdev); - } - - return ret; -} - static int xhci_try_enable_msi(struct usb_hcd *hcd) { struct xhci_hcd *xhci = hcd_to_xhci(hcd); @@ -194,13 +165,23 @@ static int xhci_try_enable_msi(struct usb_hcd *hcd) return 0; setup_msi: - /* fall back to MSI */ - ret = xhci_setup_msi(xhci); - if (!ret) { - hcd->msi_enabled = 1; - return 0; + /* TODO: Check with MSI Soc for sysdev */ + ret = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_MSI); + if (ret < 0) { + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "failed to allocate MSI entry"); + goto legacy_irq; } + ret = request_irq(pdev->irq, xhci_msi_irq, 0, "xhci_hcd", xhci_to_hcd(xhci)); + if (ret) { + xhci_dbg_trace(xhci, trace_xhci_dbg_init, "disable MSI interrupt"); + pci_free_irq_vectors(pdev); + goto legacy_irq; + } + + hcd->msi_enabled = 1; + return 0; + legacy_irq: if (!pdev->irq) { xhci_err(xhci, "No msi-x/msi found and no IRQ in BIOS\n"); -- 2.30.2