#ifndef __SOUND_MPU401_H #define __SOUND_MPU401_H /* * Header file for MPU-401 and compatible cards * 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 #define MPU401_HW_MPU401 1 /* native MPU401 */ #define MPU401_HW_SB 2 /* SoundBlaster MPU-401 UART */ #define MPU401_HW_ES1688 3 /* AudioDrive ES1688 MPU-401 UART */ #define MPU401_HW_OPL3SA2 4 /* Yamaha OPL3-SA2 */ #define MPU401_HW_SONICVIBES 5 /* S3 SonicVibes */ #define MPU401_HW_CS4232 6 /* CS4232 */ #define MPU401_HW_ES18XX 7 /* AudioDrive ES18XX MPU-401 UART */ #define MPU401_HW_FM801 8 /* ForteMedia FM801 */ #define MPU401_HW_TRID4DWAVE 9 /* Trident 4DWave */ #define MPU401_HW_AZT2320 10 /* Aztech AZT2320 */ #define MPU401_HW_ALS100 11 /* Avance Logic ALS100 */ #define MPU401_HW_ICE1712 12 /* Envy24 */ #define MPU401_HW_VIA686A 13 /* VIA 82C686A */ #define MPU401_HW_YMFPCI 14 /* YMF DS-XG PCI */ #define MPU401_HW_CMIPCI 15 /* CMIPCI MPU-401 UART */ #define MPU401_HW_ALS4000 16 /* Avance Logic ALS4000 */ #define MPU401_HW_INTEL8X0 17 /* Intel8x0 driver */ #define MPU401_HW_PC98II 18 /* Roland PC98II */ #define MPU401_HW_AUREAL 19 /* Aureal Vortex */ #define MPU401_INFO_INPUT (1 << 0) /* input stream */ #define MPU401_INFO_OUTPUT (1 << 1) /* output stream */ #define MPU401_INFO_INTEGRATED (1 << 2) /* integrated h/w port */ #define MPU401_INFO_MMIO (1 << 3) /* MMIO access */ #define MPU401_INFO_TX_IRQ (1 << 4) /* independent TX irq */ #define MPU401_INFO_IRQ_HOOK (1 << 5) /* mpu401 irq handler is called from driver irq handler */ #define MPU401_INFO_NO_ACK (1 << 6) /* No ACK cmd needed */ #define MPU401_INFO_USE_TIMER (1 << 15) /* internal */ #define MPU401_MODE_BIT_INPUT 0 #define MPU401_MODE_BIT_OUTPUT 1 #define MPU401_MODE_BIT_INPUT_TRIGGER 2 #define MPU401_MODE_BIT_OUTPUT_TRIGGER 3 #define MPU401_MODE_INPUT (1<cport #define MPU401D(mpu) (mpu)->port /* * control register bits */ /* read MPU401C() */ #define MPU401_RX_EMPTY 0x80 #define MPU401_TX_FULL 0x40 /* write MPU401C() */ #define MPU401_RESET 0xff #define MPU401_ENTER_UART 0x3f /* read MPU401D() */ #define MPU401_ACK 0xfe /* */ irqreturn_t snd_mpu401_uart_interrupt(int irq, void *dev_id); irqreturn_t snd_mpu401_uart_interrupt_tx(int irq, void *dev_id); int snd_mpu401_uart_new(struct snd_card *card, int device, unsigned short hardware, unsigned long port, unsigned int info_flags, int irq, struct snd_rawmidi ** rrawmidi); #endif /* __SOUND_MPU401_H */ select name='ignorews' onchange='this.form.submit();'>mode:
authorDouglas Miller <dougmill@linux.vnet.ibm.com>2017-01-28 06:42:20 -0600
committerTejun Heo <tj@kernel.org>2017-01-28 07:49:42 -0500
commit966d2b04e070bc040319aaebfec09e0144dc3341 (patch)
tree4b96156e3d1dd4dfd6039b7c219c9dc4616da52d /tools/perf/pmu-events/jevents.c
parent1b1bc42c1692e9b62756323c675a44cb1a1f9dbd (diff)
percpu-refcount: fix reference leak during percpu-atomic transition
percpu_ref_tryget() and percpu_ref_tryget_live() should return "true" IFF they acquire a reference. But the return value from atomic_long_inc_not_zero() is a long and may have high bits set, e.g. PERCPU_COUNT_BIAS, and the return value of the tryget routines is bool so the reference may actually be acquired but the routines return "false" which results in a reference leak since the caller assumes it does not need to do a corresponding percpu_ref_put(). This was seen when performing CPU hotplug during I/O, as hangs in blk_mq_freeze_queue_wait where percpu_ref_kill (blk_mq_freeze_queue_start) raced with percpu_ref_tryget (blk_mq_timeout_work). Sample stack trace: __switch_to+0x2c0/0x450 __schedule+0x2f8/0x970 schedule+0x48/0xc0 blk_mq_freeze_queue_wait+0x94/0x120 blk_mq_queue_reinit_work+0xb8/0x180 blk_mq_queue_reinit_prepare+0x84/0xa0 cpuhp_invoke_callback+0x17c/0x600 cpuhp_up_callbacks+0x58/0x150 _cpu_up+0xf0/0x1c0 do_cpu_up+0x120/0x150 cpu_subsys_online+0x64/0xe0 device_online+0xb4/0x120 online_store+0xb4/0xc0 dev_attr_store+0x68/0xa0 sysfs_kf_write+0x80/0xb0 kernfs_fop_write+0x17c/0x250 __vfs_write+0x6c/0x1e0 vfs_write+0xd0/0x270 SyS_write+0x6c/0x110 system_call+0x38/0xe0 Examination of the queue showed a single reference (no PERCPU_COUNT_BIAS, and __PERCPU_REF_DEAD, __PERCPU_REF_ATOMIC set) and no requests. However, conditions at the time of the race are count of PERCPU_COUNT_BIAS + 0 and __PERCPU_REF_DEAD and __PERCPU_REF_ATOMIC set. The fix is to make the tryget routines use an actual boolean internally instead of the atomic long result truncated to a int. Fixes: e625305b3907 percpu-refcount: make percpu_ref based on longs instead of ints Link: https://bugzilla.kernel.org/show_bug.cgi?id=190751 Signed-off-by: Douglas Miller <dougmill@linux.vnet.ibm.com> Reviewed-by: Jens Axboe <axboe@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org> Fixes: e625305b3907 ("percpu-refcount: make percpu_ref based on longs instead of ints") Cc: stable@vger.kernel.org # v3.18+
Diffstat (limited to 'tools/perf/pmu-events/jevents.c')