/* * Driver for the MTX-1 Watchdog. * * (C) Copyright 2005 4G Systems , * All Rights Reserved. * http://www.4g-systems.biz * * (C) Copyright 2007 OpenWrt.org, Florian Fainelli * * 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. * * Neither Michael Stickel nor 4G Systems admit liability nor provide * warranty for any of this software. This material is provided * "AS-IS" and at no charge. * * (c) Copyright 2005 4G Systems * * Release 0.01. * Author: Michael Stickel michael.stickel@4g-systems.biz * * Release 0.02. * Author: Florian Fainelli florian@openwrt.org * use the Linux watchdog/timer APIs * * The Watchdog is configured to reset the MTX-1 * if it is not triggered for 100 seconds. * It should not be triggered more often than 1.6 seconds. * * A timer triggers the watchdog every 5 seconds, until * it is opened for the first time. After the first open * it MUST be triggered every 2..95 seconds. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define MTX1_WDT_INTERVAL (5 * HZ) static int ticks = 100 * HZ; static struct { struct completion stop; spinlock_t lock; int running; struct timer_list timer; int queue; int default_ticks; unsigned long inuse; unsigned gpio; unsigned int gstate; } mtx1_wdt_device; static void mtx1_wdt_trigger(unsigned long unused) { spin_lock(&mtx1_wdt_device.lock); if (mtx1_wdt_device.running) ticks--; /* toggle wdt gpio */ mtx1_wdt_device.gstate = !mtx1_wdt_device.gstate; gpio_set_value(mtx1_wdt_device.gpio, mtx1_wdt_device.gstate); if (mtx1_wdt_device.queue && ticks) mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL); else complete(&mtx1_wdt_device.stop); spin_unlock(&mtx1_wdt_device.lock); } static void mtx1_wdt_reset(void) { ticks = mtx1_wdt_device.default_ticks; } static void mtx1_wdt_start(void) { unsigned long flags; spin_lock_irqsave(&mtx1_wdt_device.lock, flags); if (!mtx1_wdt_device.queue) { mtx1_wdt_device.queue = 1; mtx1_wdt_device.gstate = 1; gpio_set_value(mtx1_wdt_device.gpio, 1); mod_timer(&mtx1_wdt_device.timer, jiffies + MTX1_WDT_INTERVAL); } mtx1_wdt_device.running++; spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags); } static int mtx1_wdt_stop(void) { unsigned long flags; spin_lock_irqsave(&mtx1_wdt_device.lock, flags); if (mtx1_wdt_device.queue) { mtx1_wdt_device.queue = 0; mtx1_wdt_device.gstate = 0; gpio_set_value(mtx1_wdt_device.gpio, 0); } ticks = mtx1_wdt_device.default_ticks; spin_unlock_irqrestore(&mtx1_wdt_device.lock, flags); return 0; } /* Filesystem functions */ static int mtx1_wdt_open(struct inode *inode, struct file *file) { if (test_and_set_bit(0, &mtx1_wdt_device.inuse)) return -EBUSY; return nonseekable_open(inode, file); } static int mtx1_wdt_release(struct inode *inode, struct file *file) { clear_bit(0, &mtx1_wdt_device.inuse); return 0; } static long mtx1_wdt_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { void __user *argp = (void __user *)arg; int __user *p = (int __user *)argp; unsigned int value; static const struct watchdog_info ident = { .options = WDIOF_CARDRESET, .identity = "MTX-1 WDT", }; switch (cmd) { case WDIOC_GETSUPPORT: if (copy_to_user(argp, &ident, sizeof(ident))) return -EFAULT; break; case WDIOC_GETSTATUS: case WDIOC_GETBOOTSTATUS: put_user(0, p); break; case WDIOC_SETOPTIONS: if (get_user(value, p)) return -EFAULT; if (value & WDIOS_ENABLECARD) mtx1_wdt_start(); else if (value & WDIOS_DISABLECARD) mtx1_wdt_stop(); else return -EINVAL; return 0; case WDIOC_KEEPALIVE: mtx1_wdt_reset(); break; default: return -ENOTTY; } return 0; } static ssize_t mtx1_wdt_write(struct file *file, const char *buf, size_t count, loff_t *ppos) { if (!count) return -EIO; mtx1_wdt_reset(); return count; } static const struct file_operations mtx1_wdt_fops = { .owner = THIS_MODULE, .llseek = no_llseek, .unlocked_ioctl = mtx1_wdt_ioctl, .open = mtx1_wdt_open, .write = mtx1_wdt_write, .release = mtx1_wdt_release, }; static struct miscdevice mtx1_wdt_misc = { .minor = WATCHDOG_MINOR, .name = "watchdog", .fops = &mtx1_wdt_fops, }; static int mtx1_wdt_probe(struct platform_device *pdev) { int ret; mtx1_wdt_device.gpio = pdev->resource[0].start; ret = devm_gpio_request_one(&pdev->dev, mtx1_wdt_device.gpio, GPIOF_OUT_INIT_HIGH, "mtx1-wdt"); if (ret < 0) { dev_err(&pdev->dev, "failed to request gpio"); return ret; } spin_lock_init(&mtx1_wdt_device.lock); init_completion(&mtx1_wdt_device.stop); mtx1_wdt_device.queue = 0; clear_bit(0, &mtx1_wdt_device.inuse); setup_timer(&mtx1_wdt_device.timer, mtx1_wdt_trigger, 0L); mtx1_wdt_device.default_ticks = ticks; ret = misc_register(&mtx1_wdt_misc); if (ret < 0) { dev_err(&pdev->dev, "failed to register\n"); return ret; } mtx1_wdt_start(); dev_info(&pdev->dev, "MTX-1 Watchdog driver\n"); return 0; } static int mtx1_wdt_remove(struct platform_device *pdev) { /* FIXME: do we need to lock this test ? */ if (mtx1_wdt_device.queue) { mtx1_wdt_device.queue = 0; wait_for_completion(&mtx1_wdt_device.stop); } misc_deregister(&mtx1_wdt_misc); return 0; } static struct platform_driver mtx1_wdt_driver = { .probe = mtx1_wdt_probe, .remove = mtx1_wdt_remove, .driver.name = "mtx1-wdt", .driver.owner = THIS_MODULE, }; module_platform_driver(mtx1_wdt_driver); MODULE_AUTHOR("Michael Stickel, Florian Fainelli"); MODULE_DESCRIPTION("Driver for the MTX-1 watchdog"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:mtx1-wdt"); the atomic ioctl when it allocated its own event. This has been broken twice. The first time when the code was introduced, but only in the corner case when an event is allocated, but more crtc's were included by atomic check and then failing. This can mostly happen when you do an atomic modeset in i915 and the display clock is changed, which forces all crtc's to be included to the state. This has been broken worse by adding in-fences support, which caused the double free to be done unconditionally. [IGT] kms_rotation_crc: starting subtest primary-rotation-180 ============================================================================= BUG kmalloc-128 (Tainted: G U ): Object already free ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Allocated in drm_atomic_helper_setup_commit+0x285/0x2f0 [drm_kms_helper] age=0 cpu=3 pid=1529 ___slab_alloc+0x308/0x3b0 __slab_alloc+0xd/0x20 kmem_cache_alloc_trace+0x92/0x1c0 drm_atomic_helper_setup_commit+0x285/0x2f0 [drm_kms_helper] intel_atomic_commit+0x35/0x4f0 [i915] drm_atomic_commit+0x46/0x50 [drm] drm_mode_atomic_ioctl+0x7d4/0xab0 [drm] drm_ioctl+0x2b3/0x490 [drm] do_vfs_ioctl+0x69c/0x700 SyS_ioctl+0x4e/0x80 entry_SYSCALL_64_fastpath+0x13/0x94 INFO: Freed in drm_event_cancel_free+0xa3/0xb0 [drm] age=0 cpu=3 pid=1529 __slab_free+0x48/0x2e0 kfree+0x159/0x1a0 drm_event_cancel_free+0xa3/0xb0 [drm] drm_mode_atomic_ioctl+0x86d/0xab0 [drm] drm_ioctl+0x2b3/0x490 [drm] do_vfs_ioctl+0x69c/0x700 SyS_ioctl+0x4e/0x80 entry_SYSCALL_64_fastpath+0x13/0x94 INFO: Slab 0xffffde1f0997b080 objects=17 used=2 fp=0xffff92fb65ec2578 flags=0x200000000008101 INFO: Object 0xffff92fb65ec2578 @offset=1400 fp=0xffff92fb65ec2ae8 Redzone ffff92fb65ec2570: bb bb bb bb bb bb bb bb ........ Object ffff92fb65ec2578: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec2588: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec2598: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25a8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25b8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25c8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25d8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk Object ffff92fb65ec25e8: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 kkkkkkkkkkkkkkk. Redzone ffff92fb65ec25f8: bb bb bb bb bb bb bb bb ........ Padding ffff92fb65ec2738: 5a 5a 5a 5a 5a 5a 5a 5a ZZZZZZZZ CPU: 3 PID: 180 Comm: kworker/3:2 Tainted: G BU 4.10.0-rc6-patser+ #5039 Hardware name: /NUC5PPYB, BIOS PYBSWCEL.86A.0031.2015.0601.1712 06/01/2015 Workqueue: events intel_atomic_helper_free_state [i915] Call Trace: dump_stack+0x4d/0x6d print_trailer+0x20c/0x220 free_debug_processing+0x1c6/0x330 ? drm_atomic_state_default_clear+0xf7/0x1c0 [drm] __slab_free+0x48/0x2e0 ? drm_atomic_state_default_clear+0xf7/0x1c0 [drm] kfree+0x159/0x1a0 drm_atomic_state_default_clear+0xf7/0x1c0 [drm] ? drm_atomic_state_clear+0x30/0x30 [drm] intel_atomic_state_clear+0xd/0x20 [i915] drm_atomic_state_clear+0x1a/0x30 [drm] __drm_atomic_state_free+0x13/0x60 [drm] intel_atomic_helper_free_state+0x5d/0x70 [i915] process_one_work+0x260/0x4a0 worker_thread+0x2d1/0x4f0 kthread+0x127/0x130 ? process_one_work+0x4a0/0x4a0 ? kthread_stop+0x120/0x120 ret_from_fork+0x29/0x40 FIX kmalloc-128: Object at 0xffff92fb65ec2578 not freed Fixes: 3b24f7d67581 ("drm/atomic: Add struct drm_crtc_commit to track async updates") Fixes: 9626014258a5 ("drm/fence: add in-fences support") Cc: <stable@vger.kernel.org> # v4.8+ Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1485854725-27640-1-git-send-email-maarten.lankhorst@linux.intel.com
Diffstat (limited to 'drivers/usb/host/ohci-st.c')