/** * dwc3-of-simple.c - OF glue layer for simple integrations * * Copyright (c) 2015 Texas Instruments Incorporated - http://www.ti.com * * Author: Felipe Balbi * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 of * the License as published by the Free Software Foundation. * * 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. * * This is a combination of the old dwc3-qcom.c by Ivan T. Ivanov * and the original patch adding support for Xilinx' SoC * by Subbaraya Sundeep Bhatta */ #include #include #include #include #include #include #include #include #include #include struct dwc3_of_simple { struct device *dev; struct clk **clks; int num_clocks; }; static int dwc3_of_simple_clk_init(struct dwc3_of_simple *simple, int count) { struct device *dev = simple->dev; struct device_node *np = dev->of_node; int i; simple->num_clocks = count; if (!count) return 0; simple->clks = devm_kcalloc(dev, simple->num_clocks, sizeof(struct clk *), GFP_KERNEL); if (!simple->clks) return -ENOMEM; for (i = 0; i < simple->num_clocks; i++) { struct clk *clk; int ret; clk = of_clk_get(np, i); if (IS_ERR(clk)) { while (--i >= 0) clk_put(simple->clks[i]); return PTR_ERR(clk); } ret = clk_prepare_enable(clk); if (ret < 0) { while (--i >= 0) { clk_disable_unprepare(simple->clks[i]); clk_put(simple->clks[i]); } clk_put(clk); return ret; } simple->clks[i] = clk; } return 0; } static int dwc3_of_simple_probe(struct platform_device *pdev) { struct dwc3_of_simple *simple; struct device *dev = &pdev->dev; struct device_node *np = dev->of_node; int ret; int i; simple = devm_kzalloc(dev, sizeof(*simple), GFP_KERNEL); if (!simple) return -ENOMEM; platform_set_drvdata(pdev, simple); simple->dev = dev; ret = dwc3_of_simple_clk_init(simple, of_clk_get_parent_count(np)); if (ret) return ret; ret = of_platform_populate(np, NULL, NULL, dev); if (ret) { for (i = 0; i < simple->num_clocks; i++) { clk_disable_unprepare(simple->clks[i]); clk_put(simple->clks[i]); } return ret; } pm_runtime_set_active(dev); pm_runtime_enable(dev); pm_runtime_get_sync(dev); return 0; } static int dwc3_of_simple_remove(struct platform_device *pdev) { struct dwc3_of_simple *simple = platform_get_drvdata(pdev); struct device *dev = &pdev->dev; int i; for (i = 0; i < simple->num_clocks; i++) { clk_disable_unprepare(simple->clks[i]); clk_put(simple->clks[i]); } of_platform_depopulate(dev); pm_runtime_put_sync(dev); pm_runtime_disable(dev); return 0; } #ifdef CONFIG_PM static int dwc3_of_simple_runtime_suspend(struct device *dev) { struct dwc3_of_simple *simple = dev_get_drvdata(dev); int i; for (i = 0; i < simple->num_clocks; i++) clk_disable(simple->clks[i]); return 0; } static int dwc3_of_simple_runtime_resume(struct device *dev) { struct dwc3_of_simple *simple = dev_get_drvdata(dev); int ret; int i; for (i = 0; i < simple->num_clocks; i++) { ret = clk_enable(simple->clks[i]); if (ret < 0) { while (--i >= 0) clk_disable(simple->clks[i]); return ret; } } return 0; } #endif static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = { SET_RUNTIME_PM_OPS(dwc3_of_simple_runtime_suspend, dwc3_of_simple_runtime_resume, NULL) }; static const struct of_device_id of_dwc3_simple_match[] = { { .compatible = "qcom,dwc3" }, { .compatible = "rockchip,rk3399-dwc3" }, { .compatible = "xlnx,zynqmp-dwc3" }, { .compatible = "cavium,octeon-7130-usb-uctl" }, { /* Sentinel */ } }; MODULE_DEVICE_TABLE(of, of_dwc3_simple_match); static struct platform_driver dwc3_of_simple_driver = { .probe = dwc3_of_simple_probe, .remove = dwc3_of_simple_remove, .driver = { .name = "dwc3-of-simple", .of_match_table = of_dwc3_simple_match, }, }; module_platform_driver(dwc3_of_simple_driver); MODULE_LICENSE("GPL v2"); MODULE_DESCRIPTION("DesignWare USB3 OF Simple Glue Layer"); MODULE_AUTHOR("Felipe Balbi "); ='ctrl'>
authorDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
committerDavid S. Miller <davem@davemloft.net>2017-01-30 14:28:22 -0800
commit54791b276b4000b307339f269d3bf7db877d536f (patch)
tree1c2616bd373ce5ea28aac2a53e32f5b5834901ce /net/mac802154/trace.h
parent5d0e7705774dd412a465896d08d59a81a345c1e4 (diff)
parent047487241ff59374fded8c477f21453681f5995c (diff)
Merge branch 'sparc64-non-resumable-user-error-recovery'
Liam R. Howlett says: ==================== sparc64: Recover from userspace non-resumable PIO & MEM errors A non-resumable error from userspace is able to cause a kernel panic or trap loop due to the setup and handling of the queued traps once in the kernel. This patch series addresses both of these issues. The queues are fixed by simply zeroing the memory before use. PIO errors from userspace will result in a SIGBUS being sent to the user process. The MEM errors form userspace will result in a SIGKILL and also cause the offending pages to be claimed so they are no longer used in future tasks. SIGKILL is used to ensure that the process does not try to coredump and result in an attempt to read the memory again from within kernel space. Although there is a HV call to scrub the memory (mem_scrub), there is no easy way to guarantee that the real memory address(es) are not used by other tasks. Clearing the error with mem_scrub would zero the memory and cause the other processes to proceed with bad data. The handling of other non-resumable errors remain unchanged and will cause a panic. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mac802154/trace.h')