#ifndef __SOUND_HWDEP_H #define __SOUND_HWDEP_H /* * Hardware dependent layer * Copyright (c) by Jaroslav Kysela * * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include #include struct snd_hwdep; /* hwdep file ops; all ops can be NULL */ struct snd_hwdep_ops { long long (*llseek)(struct snd_hwdep *hw, struct file *file, long long offset, int orig); long (*read)(struct snd_hwdep *hw, char __user *buf, long count, loff_t *offset); long (*write)(struct snd_hwdep *hw, const char __user *buf, long count, loff_t *offset); int (*open)(struct snd_hwdep *hw, struct file * file); int (*release)(struct snd_hwdep *hw, struct file * file); unsigned int (*poll)(struct snd_hwdep *hw, struct file *file, poll_table *wait); int (*ioctl)(struct snd_hwdep *hw, struct file *file, unsigned int cmd, unsigned long arg); int (*ioctl_compat)(struct snd_hwdep *hw, struct file *file, unsigned int cmd, unsigned long arg); int (*mmap)(struct snd_hwdep *hw, struct file *file, struct vm_area_struct *vma); int (*dsp_status)(struct snd_hwdep *hw, struct snd_hwdep_dsp_status *status); int (*dsp_load)(struct snd_hwdep *hw, struct snd_hwdep_dsp_image *image); }; struct snd_hwdep { struct snd_card *card; struct list_head list; int device; char id[32]; char name[80]; int iface; #ifdef CONFIG_SND_OSSEMUL int oss_type; int ossreg; #endif struct snd_hwdep_ops ops; wait_queue_head_t open_wait; void *private_data; void (*private_free) (struct snd_hwdep *hwdep); struct device dev; struct mutex open_mutex; int used; /* reference counter */ unsigned int dsp_loaded; /* bit fields of loaded dsp indices */ unsigned int exclusive:1; /* exclusive access mode */ }; extern int snd_hwdep_new(struct snd_card *card, char *id, int device, struct snd_hwdep **rhwdep); #endif /* __SOUND_HWDEP_H */ />
path: root/sound/isa/gus/gusmax.c
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authorThomas Gleixner <tglx@linutronix.de>2017-01-31 09:37:34 +0100
committerThomas Gleixner <tglx@linutronix.de>2017-01-31 21:47:58 +0100
commit0becc0ae5b42828785b589f686725ff5bc3b9b25 (patch)
treebe6d0e1f37c38ed0a7dd5da2d4b1e93f0fb43101 /sound/isa/gus/gusmax.c
parent24c2503255d35c269b67162c397a1a1c1e02f6ce (diff)
x86/mce: Make timer handling more robust
Erik reported that on a preproduction hardware a CMCI storm triggers the BUG_ON in add_timer_on(). The reason is that the per CPU MCE timer is started by the CMCI logic before the MCE CPU hotplug callback starts the timer with add_timer_on(). So the timer is already queued which triggers the BUG. Using add_timer_on() is pretty pointless in this code because the timer is strictlty per CPU, initialized as pinned and all operations which arm the timer happen on the CPU to which the timer belongs. Simplify the whole machinery by using mod_timer() instead of add_timer_on() which avoids the problem because mod_timer() can handle already queued timers. Use __start_timer() everywhere so the earliest armed expiry time is preserved. Reported-by: Erik Veijola <erik.veijola@intel.com> Tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Borislav Petkov <bp@alien8.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701310936080.3457@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'sound/isa/gus/gusmax.c')