/* * SuperH EHCI host controller driver * * Copyright (C) 2010 Paul Mundt * * Based on ohci-sh.c and ehci-atmel.c. * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive * for more details. */ #include #include #include struct ehci_sh_priv { struct clk *iclk, *fclk; struct usb_hcd *hcd; }; static int ehci_sh_reset(struct usb_hcd *hcd) { struct ehci_hcd *ehci = hcd_to_ehci(hcd); ehci->caps = hcd->regs; return ehci_setup(hcd); } static const struct hc_driver ehci_sh_hc_driver = { .description = hcd_name, .product_desc = "SuperH EHCI", .hcd_priv_size = sizeof(struct ehci_hcd), /* * generic hardware linkage */ .irq = ehci_irq, .flags = HCD_USB2 | HCD_MEMORY | HCD_BH, /* * basic lifecycle operations */ .reset = ehci_sh_reset, .start = ehci_run, .stop = ehci_stop, .shutdown = ehci_shutdown, /* * managing i/o requests and associated device resources */ .urb_enqueue = ehci_urb_enqueue, .urb_dequeue = ehci_urb_dequeue, .endpoint_disable = ehci_endpoint_disable, .endpoint_reset = ehci_endpoint_reset, /* * scheduling support */ .get_frame_number = ehci_get_frame, /* * root hub support */ .hub_status_data = ehci_hub_status_data, .hub_control = ehci_hub_control, #ifdef CONFIG_PM .bus_suspend = ehci_bus_suspend, .bus_resume = ehci_bus_resume, #endif .relinquish_port = ehci_relinquish_port, .port_handed_over = ehci_port_handed_over, .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete, }; static int ehci_hcd_sh_probe(struct platform_device *pdev) { struct resource *res; struct ehci_sh_priv *priv; struct ehci_sh_platdata *pdata; struct usb_hcd *hcd; int irq, ret; if (usb_disabled()) return -ENODEV; irq = platform_get_irq(pdev, 0); if (irq <= 0) { dev_err(&pdev->dev, "Found HC with no IRQ. Check %s setup!\n", dev_name(&pdev->dev)); ret = -ENODEV; goto fail_create_hcd; } pdata = dev_get_platdata(&pdev->dev); /* initialize hcd */ hcd = usb_create_hcd(&ehci_sh_hc_driver, &pdev->dev, dev_name(&pdev->dev)); if (!hcd) { ret = -ENOMEM; goto fail_create_hcd; } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); hcd->regs = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(hcd->regs)) { ret = PTR_ERR(hcd->regs); goto fail_request_resource; } hcd->rsrc_start = res->start; hcd->rsrc_len = resource_size(res); priv = devm_kzalloc(&pdev->dev, sizeof(struct ehci_sh_priv), GFP_KERNEL); if (!priv) { ret = -ENOMEM; goto fail_request_resource; } /* These are optional, we don't care if they fail */ priv->fclk = devm_clk_get(&pdev->dev, "usb_fck"); if (IS_ERR(priv->fclk)) priv->fclk = NULL; priv->iclk = devm_clk_get(&pdev->dev, "usb_ick"); if (IS_ERR(priv->iclk)) priv->iclk = NULL; clk_enable(priv->fclk); clk_enable(priv->iclk); if (pdata && pdata->phy_init) pdata->phy_init(); ret = usb_add_hcd(hcd, irq, IRQF_SHARED); if (ret != 0) { dev_err(&pdev->dev, "Failed to add hcd"); goto fail_add_hcd; } device_wakeup_enable(hcd->self.controller); priv->hcd = hcd; platform_set_drvdata(pdev, priv); return ret; fail_add_hcd: clk_disable(priv->iclk); clk_disable(priv->fclk); fail_request_resource: usb_put_hcd(hcd); fail_create_hcd: dev_err(&pdev->dev, "init %s fail, %d\n", dev_name(&pdev->dev), ret); return ret; } static int ehci_hcd_sh_remove(struct platform_device *pdev) { struct ehci_sh_priv *priv = platform_get_drvdata(pdev); struct usb_hcd *hcd = priv->hcd; usb_remove_hcd(hcd); usb_put_hcd(hcd); clk_disable(priv->fclk); clk_disable(priv->iclk); return 0; } static void ehci_hcd_sh_shutdown(struct platform_device *pdev) { struct ehci_sh_priv *priv = platform_get_drvdata(pdev); struct usb_hcd *hcd = priv->hcd; if (hcd->driver->shutdown) hcd->driver->shutdown(hcd); } static struct platform_driver ehci_hcd_sh_driver = { .probe = ehci_hcd_sh_probe, .remove = ehci_hcd_sh_remove, .shutdown = ehci_hcd_sh_shutdown, .driver = { .name = "sh_ehci", }, }; MODULE_ALIAS("platform:sh_ehci"); mode:
authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /sound/core/seq/seq.c
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'sound/core/seq/seq.c')