/* * Copyright (C) 2003-2008 Takahiro Hirofuchi * * This 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 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, * USA. */ #ifndef __USBIP_STUB_H #define __USBIP_STUB_H #include #include #include #include #include #include #define STUB_BUSID_OTHER 0 #define STUB_BUSID_REMOV 1 #define STUB_BUSID_ADDED 2 #define STUB_BUSID_ALLOC 3 struct stub_device { struct usb_device *udev; struct usbip_device ud; __u32 devid; /* * stub_priv preserves private data of each urb. * It is allocated as stub_priv_cache and assigned to urb->context. * * stub_priv is always linked to any one of 3 lists; * priv_init: linked to this until the comletion of a urb. * priv_tx : linked to this after the completion of a urb. * priv_free: linked to this after the sending of the result. * * Any of these list operations should be locked by priv_lock. */ spinlock_t priv_lock; struct list_head priv_init; struct list_head priv_tx; struct list_head priv_free; /* see comments for unlinking in stub_rx.c */ struct list_head unlink_tx; struct list_head unlink_free; wait_queue_head_t tx_waitq; }; /* private data into urb->priv */ struct stub_priv { unsigned long seqnum; struct list_head list; struct stub_device *sdev; struct urb *urb; int unlinking; }; struct stub_unlink { unsigned long seqnum; struct list_head list; __u32 status; }; /* same as SYSFS_BUS_ID_SIZE */ #define BUSID_SIZE 32 struct bus_id_priv { char name[BUSID_SIZE]; char status; int interf_count; struct stub_device *sdev; struct usb_device *udev; char shutdown_busid; }; /* stub_priv is allocated from stub_priv_cache */ extern struct kmem_cache *stub_priv_cache; /* stub_dev.c */ extern struct usb_device_driver stub_driver; /* stub_main.c */ struct bus_id_priv *get_busid_priv(const char *busid); int del_match_busid(char *busid); void stub_device_cleanup_urbs(struct stub_device *sdev); /* stub_rx.c */ int stub_rx_loop(void *data); /* stub_tx.c */ void stub_enqueue_ret_unlink(struct stub_device *sdev, __u32 seqnum, __u32 status); void stub_complete(struct urb *urb); int stub_tx_loop(void *data); #endif /* __USBIP_STUB_H */ -remove&id=bc7c36eedb0c7004aa06c2afc3c5385adada8fa3'>root/sound/spi
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authorJoonyoung Shim <jy0922.shim@samsung.com>2017-01-17 13:54:36 +0900
committerThomas Gleixner <tglx@linutronix.de>2017-01-17 10:08:38 +0100
commitbc7c36eedb0c7004aa06c2afc3c5385adada8fa3 (patch)
tree14ce1ae3cce8013aa4bc46297f6370ec0527be78 /sound/spi
parent49def1853334396f948dcb4cedb9347abb318df5 (diff)
clocksource/exynos_mct: Clear interrupt when cpu is shut down
When a CPU goes offline a potentially pending timer interrupt is not cleared. When the CPU comes online again then the pending interrupt is delivered before the per cpu clockevent device is initialized. As a consequence the tick interrupt handler dereferences a NULL pointer. [ 51.251378] Unable to handle kernel NULL pointer dereference at virtual address 00000040 [ 51.289348] task: ee942d00 task.stack: ee960000 [ 51.293861] PC is at tick_periodic+0x38/0xb0 [ 51.298102] LR is at tick_handle_periodic+0x1c/0x90 Clear the pending interrupt in the cpu dying path. Fixes: 56a94f13919c ("clocksource: exynos_mct: Avoid blocking calls in the cpu hotplug notifier") Reported-by: Seung-Woo Kim <sw0312.kim@samsung.com> Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com> Cc: linux-samsung-soc@vger.kernel.org Cc: cw00.choi@samsung.com Cc: daniel.lezcano@linaro.org Cc: stable@vger.kernel.org Cc: javier@osg.samsung.com Cc: kgene@kernel.org Cc: krzk@kernel.org Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1484628876-22065-1-git-send-email-jy0922.shim@samsung.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'sound/spi')