/* * ak4671.h -- audio driver for AK4671 * * Copyright (C) 2009 Samsung Electronics Co.Ltd * Author: Joonyoung Shim * * 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. * */ #ifndef _AK4671_H #define _AK4671_H #define AK4671_AD_DA_POWER_MANAGEMENT 0x00 #define AK4671_PLL_MODE_SELECT0 0x01 #define AK4671_PLL_MODE_SELECT1 0x02 #define AK4671_FORMAT_SELECT 0x03 #define AK4671_MIC_SIGNAL_SELECT 0x04 #define AK4671_MIC_AMP_GAIN 0x05 #define AK4671_MIXING_POWER_MANAGEMENT0 0x06 #define AK4671_MIXING_POWER_MANAGEMENT1 0x07 #define AK4671_OUTPUT_VOLUME_CONTROL 0x08 #define AK4671_LOUT1_SIGNAL_SELECT 0x09 #define AK4671_ROUT1_SIGNAL_SELECT 0x0a #define AK4671_LOUT2_SIGNAL_SELECT 0x0b #define AK4671_ROUT2_SIGNAL_SELECT 0x0c #define AK4671_LOUT3_SIGNAL_SELECT 0x0d #define AK4671_ROUT3_SIGNAL_SELECT 0x0e #define AK4671_LOUT1_POWER_MANAGERMENT 0x0f #define AK4671_LOUT2_POWER_MANAGERMENT 0x10 #define AK4671_LOUT3_POWER_MANAGERMENT 0x11 #define AK4671_LCH_INPUT_VOLUME_CONTROL 0x12 #define AK4671_RCH_INPUT_VOLUME_CONTROL 0x13 #define AK4671_ALC_REFERENCE_SELECT 0x14 #define AK4671_DIGITAL_MIXING_CONTROL 0x15 #define AK4671_ALC_TIMER_SELECT 0x16 #define AK4671_ALC_MODE_CONTROL 0x17 #define AK4671_MODE_CONTROL1 0x18 #define AK4671_MODE_CONTROL2 0x19 #define AK4671_LCH_OUTPUT_VOLUME_CONTROL 0x1a #define AK4671_RCH_OUTPUT_VOLUME_CONTROL 0x1b #define AK4671_SIDETONE_A_CONTROL 0x1c #define AK4671_DIGITAL_FILTER_SELECT 0x1d #define AK4671_FIL3_COEFFICIENT0 0x1e #define AK4671_FIL3_COEFFICIENT1 0x1f #define AK4671_FIL3_COEFFICIENT2 0x20 #define AK4671_FIL3_COEFFICIENT3 0x21 #define AK4671_EQ_COEFFICIENT0 0x22 #define AK4671_EQ_COEFFICIENT1 0x23 #define AK4671_EQ_COEFFICIENT2 0x24 #define AK4671_EQ_COEFFICIENT3 0x25 #define AK4671_EQ_COEFFICIENT4 0x26 #define AK4671_EQ_COEFFICIENT5 0x27 #define AK4671_FIL1_COEFFICIENT0 0x28 #define AK4671_FIL1_COEFFICIENT1 0x29 #define AK4671_FIL1_COEFFICIENT2 0x2a #define AK4671_FIL1_COEFFICIENT3 0x2b #define AK4671_FIL2_COEFFICIENT0 0x2c #define AK4671_FIL2_COEFFICIENT1 0x2d #define AK4671_FIL2_COEFFICIENT2 0x2e #define AK4671_FIL2_COEFFICIENT3 0x2f #define AK4671_DIGITAL_FILTER_SELECT2 0x30 #define AK4671_E1_COEFFICIENT0 0x32 #define AK4671_E1_COEFFICIENT1 0x33 #define AK4671_E1_COEFFICIENT2 0x34 #define AK4671_E1_COEFFICIENT3 0x35 #define AK4671_E1_COEFFICIENT4 0x36 #define AK4671_E1_COEFFICIENT5 0x37 #define AK4671_E2_COEFFICIENT0 0x38 #define AK4671_E2_COEFFICIENT1 0x39 #define AK4671_E2_COEFFICIENT2 0x3a #define AK4671_E2_COEFFICIENT3 0x3b #define AK4671_E2_COEFFICIENT4 0x3c #define AK4671_E2_COEFFICIENT5 0x3d #define AK4671_E3_COEFFICIENT0 0x3e #define AK4671_E3_COEFFICIENT1 0x3f #define AK4671_E3_COEFFICIENT2 0x40 #define AK4671_E3_COEFFICIENT3 0x41 #define AK4671_E3_COEFFICIENT4 0x42 #define AK4671_E3_COEFFICIENT5 0x43 #define AK4671_E4_COEFFICIENT0 0x44 #define AK4671_E4_COEFFICIENT1 0x45 #define AK4671_E4_COEFFICIENT2 0x46 #define AK4671_E4_COEFFICIENT3 0x47 #define AK4671_E4_COEFFICIENT4 0x48 #define AK4671_E4_COEFFICIENT5 0x49 #define AK4671_E5_COEFFICIENT0 0x4a #define AK4671_E5_COEFFICIENT1 0x4b #define AK4671_E5_COEFFICIENT2 0x4c #define AK4671_E5_COEFFICIENT3 0x4d #define AK4671_E5_COEFFICIENT4 0x4e #define AK4671_E5_COEFFICIENT5 0x4f #define AK4671_EQ_CONTROL_250HZ_100HZ 0x50 #define AK4671_EQ_CONTROL_3500HZ_1KHZ 0x51 #define AK4671_EQ_CONTRO_10KHZ 0x52 #define AK4671_PCM_IF_CONTROL0 0x53 #define AK4671_PCM_IF_CONTROL1 0x54 #define AK4671_PCM_IF_CONTROL2 0x55 #define AK4671_DIGITAL_VOLUME_B_CONTROL 0x56 #define AK4671_DIGITAL_VOLUME_C_CONTROL 0x57 #define AK4671_SIDETONE_VOLUME_CONTROL 0x58 #define AK4671_DIGITAL_MIXING_CONTROL2 0x59 #define AK4671_SAR_ADC_CONTROL 0x5a /* Bitfield Definitions */ /* AK4671_AD_DA_POWER_MANAGEMENT (0x00) Fields */ #define AK4671_PMVCM 0x01 /* AK4671_PLL_MODE_SELECT0 (0x01) Fields */ #define AK4671_PLL 0x0f #define AK4671_PLL_11_2896MHZ (4 << 0) #define AK4671_PLL_12_288MHZ (5 << 0) #define AK4671_PLL_12MHZ (6 << 0) #define AK4671_PLL_24MHZ (7 << 0) #define AK4671_PLL_19_2MHZ (8 << 0) #define AK4671_PLL_13_5MHZ (12 << 0) #define AK4671_PLL_27MHZ (13 << 0) #define AK4671_PLL_13MHZ (14 << 0) #define AK4671_PLL_26MHZ (15 << 0) #define AK4671_FS 0xf0 #define AK4671_FS_8KHZ (0 << 4) #define AK4671_FS_12KHZ (1 << 4) #define AK4671_FS_16KHZ (2 << 4) #define AK4671_FS_24KHZ (3 << 4) #define AK4671_FS_11_025KHZ (5 << 4) #define AK4671_FS_22_05KHZ (7 << 4) #define AK4671_FS_32KHZ (10 << 4) #define AK4671_FS_48KHZ (11 << 4) #define AK4671_FS_44_1KHZ (15 << 4) /* AK4671_PLL_MODE_SELECT1 (0x02) Fields */ #define AK4671_PMPLL 0x01 #define AK4671_M_S 0x02 /* AK4671_FORMAT_SELECT (0x03) Fields */ #define AK4671_DIF 0x03 #define AK4671_DIF_DSP_MODE (0 << 0) #define AK4671_DIF_MSB_MODE (2 << 0) #define AK4671_DIF_I2S_MODE (3 << 0) #define AK4671_BCKP 0x04 #define AK4671_MSBS 0x08 #define AK4671_SDOD 0x10 /* AK4671_LOUT2_POWER_MANAGEMENT (0x10) Fields */ #define AK4671_MUTEN 0x04 #endif td colspan='2' class='oid'>1b1bc42c1692e9b62756323c675a44cb1a1f9dbd (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 'fs/befs/btree.h')