/* * c67x00-drv.c: Cypress C67X00 USB Common infrastructure * * Copyright (C) 2006-2008 Barco N.V. * Derived from the Cypress cy7c67200/300 ezusb linux driver and * based on multiple host controller drivers inside the linux kernel. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * MA 02110-1301 USA. */ /* * This file implements the common infrastructure for using the c67x00. * It is both the link between the platform configuration and subdrivers and * the link between the common hardware parts and the subdrivers (e.g. * interrupt handling). * * The c67x00 has 2 SIE's (serial interface engine) which can be configured * to be host, device or OTG (with some limitations, E.G. only SIE1 can be OTG). * * Depending on the platform configuration, the SIE's are created and * the corresponding subdriver is initialized (c67x00_probe_sie). */ #include #include #include #include #include #include #include #include "c67x00.h" #include "c67x00-hcd.h" static void c67x00_probe_sie(struct c67x00_sie *sie, struct c67x00_device *dev, int sie_num) { spin_lock_init(&sie->lock); sie->dev = dev; sie->sie_num = sie_num; sie->mode = c67x00_sie_config(dev->pdata->sie_config, sie_num); switch (sie->mode) { case C67X00_SIE_HOST: c67x00_hcd_probe(sie); break; case C67X00_SIE_UNUSED: dev_info(sie_dev(sie), "Not using SIE %d as requested\n", sie->sie_num); break; default: dev_err(sie_dev(sie), "Unsupported configuration: 0x%x for SIE %d\n", sie->mode, sie->sie_num); break; } } static void c67x00_remove_sie(struct c67x00_sie *sie) { switch (sie->mode) { case C67X00_SIE_HOST: c67x00_hcd_remove(sie); break; default: break; } } static irqreturn_t c67x00_irq(int irq, void *__dev) { struct c67x00_device *c67x00 = __dev; struct c67x00_sie *sie; u16 msg, int_status; int i, count = 8; int_status = c67x00_ll_hpi_status(c67x00); if (!int_status) return IRQ_NONE; while (int_status != 0 && (count-- >= 0)) { c67x00_ll_irq(c67x00, int_status); for (i = 0; i < C67X00_SIES; i++) { sie = &c67x00->sie[i]; msg = 0; if (int_status & SIEMSG_FLG(i)) msg = c67x00_ll_fetch_siemsg(c67x00, i); if (sie->irq) sie->irq(sie, int_status, msg); } int_status = c67x00_ll_hpi_status(c67x00); } if (int_status) dev_warn(&c67x00->pdev->dev, "Not all interrupts handled! " "status = 0x%04x\n", int_status); return IRQ_HANDLED; } /* ------------------------------------------------------------------------- */ static int c67x00_drv_probe(struct platform_device *pdev) { struct c67x00_device *c67x00; struct c67x00_platform_data *pdata; struct resource *res, *res2; int ret, i; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) return -ENODEV; res2 = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (!res2) return -ENODEV; pdata = dev_get_platdata(&pdev->dev); if (!pdata) return -ENODEV; c67x00 = kzalloc(sizeof(*c67x00), GFP_KERNEL); if (!c67x00) return -ENOMEM; if (!request_mem_region(res->start, resource_size(res), pdev->name)) { dev_err(&pdev->dev, "Memory region busy\n"); ret = -EBUSY; goto request_mem_failed; } c67x00->hpi.base = ioremap(res->start, resource_size(res)); if (!c67x00->hpi.base) { dev_err(&pdev->dev, "Unable to map HPI registers\n"); ret = -EIO; goto map_failed; } spin_lock_init(&c67x00->hpi.lock); c67x00->hpi.regstep = pdata->hpi_regstep; c67x00->pdata = dev_get_platdata(&pdev->dev); c67x00->pdev = pdev; c67x00_ll_init(c67x00); c67x00_ll_hpi_reg_init(c67x00); ret = request_irq(res2->start, c67x00_irq, 0, pdev->name, c67x00); if (ret) { dev_err(&pdev->dev, "Cannot claim IRQ\n"); goto request_irq_failed; } ret = c67x00_ll_reset(c67x00); if (ret) { dev_err(&pdev->dev, "Device reset failed\n"); goto reset_failed; } for (i = 0; i < C67X00_SIES; i++) c67x00_probe_sie(&c67x00->sie[i], c67x00, i); platform_set_drvdata(pdev, c67x00); return 0; reset_failed: free_irq(res2->start, c67x00); request_irq_failed: iounmap(c67x00->hpi.base); map_failed: release_mem_region(res->start, resource_size(res)); request_mem_failed: kfree(c67x00); return ret; } static int c67x00_drv_remove(struct platform_device *pdev) { struct c67x00_device *c67x00 = platform_get_drvdata(pdev); struct resource *res; int i; for (i = 0; i < C67X00_SIES; i++) c67x00_remove_sie(&c67x00->sie[i]); c67x00_ll_release(c67x00); res = platform_get_resource(pdev, IORESOURCE_IRQ, 0); if (res) free_irq(res->start, c67x00); iounmap(c67x00->hpi.base); res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (res) release_mem_region(res->start, resource_size(res)); kfree(c67x00); return 0; } static struct platform_driver c67x00_driver = { .probe = c67x00_drv_probe, .remove = c67x00_drv_remove, .driver = { .name = "c67x00", }, }; module_platform_driver(c67x00_driver); MODULE_AUTHOR("Peter Korsgaard, Jan Veldeman, Grant Likely"); MODULE_DESCRIPTION("Cypress C67X00 USB Controller Driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:c67x00"); 5d69fc6963c16003f50d7e8d74b02d0a143 (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/isa/msnd/msnd_pinnacle.h')