/* * Driver for Digigram VXpocket soundcards * * Copyright (c) 2002 by Takashi Iwai * * 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 */ #ifndef __VXPOCKET_H #define __VXPOCKET_H #include #include #include struct snd_vxpocket { struct vx_core core; unsigned long port; int mic_level; /* analog mic level (or boost) */ unsigned int regCDSP; /* current CDSP register */ unsigned int regDIALOG; /* current DIALOG register */ int index; /* card index */ /* pcmcia stuff */ struct pcmcia_device *p_dev; }; extern struct snd_vx_ops snd_vxpocket_ops; void vx_set_mic_boost(struct vx_core *chip, int boost); void vx_set_mic_level(struct vx_core *chip, int level); int vxp_add_mic_controls(struct vx_core *chip); /* Constants used to access the CDSP register (0x08). */ #define CDSP_MAGIC 0xA7 /* magic value (for read) */ /* for write */ #define VXP_CDSP_CLOCKIN_SEL_MASK 0x80 /* 0 (internal), 1 (AES/EBU) */ #define VXP_CDSP_DATAIN_SEL_MASK 0x40 /* 0 (analog), 1 (UER) */ #define VXP_CDSP_SMPTE_SEL_MASK 0x20 #define VXP_CDSP_RESERVED_MASK 0x10 #define VXP_CDSP_MIC_SEL_MASK 0x08 #define VXP_CDSP_VALID_IRQ_MASK 0x04 #define VXP_CDSP_CODEC_RESET_MASK 0x02 #define VXP_CDSP_DSP_RESET_MASK 0x01 /* VXPOCKET 240/440 */ #define P24_CDSP_MICS_SEL_MASK 0x18 #define P24_CDSP_MIC20_SEL_MASK 0x10 #define P24_CDSP_MIC38_SEL_MASK 0x08 /* Constants used to access the MEMIRQ register (0x0C). */ #define P44_MEMIRQ_MASTER_SLAVE_SEL_MASK 0x08 #define P44_MEMIRQ_SYNCED_ALONE_SEL_MASK 0x04 #define P44_MEMIRQ_WCLK_OUT_IN_SEL_MASK 0x02 /* Not used */ #define P44_MEMIRQ_WCLK_UER_SEL_MASK 0x01 /* Not used */ /* Micro levels (0x0C) */ /* Constants used to access the DIALOG register (0x0D). */ #define VXP_DLG_XILINX_REPROG_MASK 0x80 /* W */ #define VXP_DLG_DATA_XICOR_MASK 0x80 /* R */ #define VXP_DLG_RESERVED4_0_MASK 0x40 #define VXP_DLG_RESERVED2_0_MASK 0x20 #define VXP_DLG_RESERVED1_0_MASK 0x10 #define VXP_DLG_DMAWRITE_SEL_MASK 0x08 /* W */ #define VXP_DLG_DMAREAD_SEL_MASK 0x04 /* W */ #define VXP_DLG_MEMIRQ_MASK 0x02 /* R */ #define VXP_DLG_DMA16_SEL_MASK 0x02 /* W */ #define VXP_DLG_ACK_MEMIRQ_MASK 0x01 /* R/W */ #endif /* __VXPOCKET_H */ >4space:mode:
Diffstat (limited to 'sound/pci/ctxfi/cthw20k1.c')
ption value='0' selected='selected'>include
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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 /include/math-emu/op-8.h
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 'include/math-emu/op-8.h')