/* * Copyright 2013 Ideas On Board SPRL * * 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 __DT_BINDINGS_CLOCK_R8A7791_H__ #define __DT_BINDINGS_CLOCK_R8A7791_H__ /* CPG */ #define R8A7791_CLK_MAIN 0 #define R8A7791_CLK_PLL0 1 #define R8A7791_CLK_PLL1 2 #define R8A7791_CLK_PLL3 3 #define R8A7791_CLK_LB 4 #define R8A7791_CLK_QSPI 5 #define R8A7791_CLK_SDH 6 #define R8A7791_CLK_SD0 7 #define R8A7791_CLK_Z 8 #define R8A7791_CLK_RCAN 9 #define R8A7791_CLK_ADSP 10 /* MSTP0 */ #define R8A7791_CLK_MSIOF0 0 /* MSTP1 */ #define R8A7791_CLK_VCP0 1 #define R8A7791_CLK_VPC0 3 #define R8A7791_CLK_JPU 6 #define R8A7791_CLK_SSP1 9 #define R8A7791_CLK_TMU1 11 #define R8A7791_CLK_3DG 12 #define R8A7791_CLK_2DDMAC 15 #define R8A7791_CLK_FDP1_1 18 #define R8A7791_CLK_FDP1_0 19 #define R8A7791_CLK_TMU3 21 #define R8A7791_CLK_TMU2 22 #define R8A7791_CLK_CMT0 24 #define R8A7791_CLK_TMU0 25 #define R8A7791_CLK_VSP1_DU1 27 #define R8A7791_CLK_VSP1_DU0 28 #define R8A7791_CLK_VSP1_S 31 /* MSTP2 */ #define R8A7791_CLK_SCIFA2 2 #define R8A7791_CLK_SCIFA1 3 #define R8A7791_CLK_SCIFA0 4 #define R8A7791_CLK_MSIOF2 5 #define R8A7791_CLK_SCIFB0 6 #define R8A7791_CLK_SCIFB1 7 #define R8A7791_CLK_MSIOF1 8 #define R8A7791_CLK_SCIFB2 16 #define R8A7791_CLK_SYS_DMAC1 18 #define R8A7791_CLK_SYS_DMAC0 19 /* MSTP3 */ #define R8A7791_CLK_TPU0 4 #define R8A7791_CLK_SDHI2 11 #define R8A7791_CLK_SDHI1 12 #define R8A7791_CLK_SDHI0 14 #define R8A7791_CLK_MMCIF0 15 #define R8A7791_CLK_IIC0 18 #define R8A7791_CLK_PCIEC 19 #define R8A7791_CLK_IIC1 23 #define R8A7791_CLK_SSUSB 28 #define R8A7791_CLK_CMT1 29 #define R8A7791_CLK_USBDMAC0 30 #define R8A7791_CLK_USBDMAC1 31 /* MSTP4 */ #define R8A7791_CLK_IRQC 7 /* MSTP5 */ #define R8A7791_CLK_AUDIO_DMAC1 1 #define R8A7791_CLK_AUDIO_DMAC0 2 #define R8A7791_CLK_ADSP_MOD 6 #define R8A7791_CLK_THERMAL 22 #define R8A7791_CLK_PWM 23 /* MSTP7 */ #define R8A7791_CLK_EHCI 3 #define R8A7791_CLK_HSUSB 4 #define R8A7791_CLK_HSCIF2 13 #define R8A7791_CLK_SCIF5 14 #define R8A7791_CLK_SCIF4 15 #define R8A7791_CLK_HSCIF1 16 #define R8A7791_CLK_HSCIF0 17 #define R8A7791_CLK_SCIF3 18 #define R8A7791_CLK_SCIF2 19 #define R8A7791_CLK_SCIF1 20 #define R8A7791_CLK_SCIF0 21 #define R8A7791_CLK_DU1 23 #define R8A7791_CLK_DU0 24 #define R8A7791_CLK_LVDS0 26 /* MSTP8 */ #define R8A7791_CLK_IPMMU_SGX 0 #define R8A7791_CLK_MLB 2 #define R8A7791_CLK_VIN2 9 #define R8A7791_CLK_VIN1 10 #define R8A7791_CLK_VIN0 11 #define R8A7791_CLK_ETHERAVB 12 #define R8A7791_CLK_ETHER 13 #define R8A7791_CLK_SATA1 14 #define R8A7791_CLK_SATA0 15 /* MSTP9 */ #define R8A7791_CLK_GPIO7 4 #define R8A7791_CLK_GPIO6 5 #define R8A7791_CLK_GPIO5 7 #define R8A7791_CLK_GPIO4 8 #define R8A7791_CLK_GPIO3 9 #define R8A7791_CLK_GPIO2 10 #define R8A7791_CLK_GPIO1 11 #define R8A7791_CLK_GPIO0 12 #define R8A7791_CLK_RCAN1 15 #define R8A7791_CLK_RCAN0 16 #define R8A7791_CLK_QSPI_MOD 17 #define R8A7791_CLK_I2C5 25 #define R8A7791_CLK_IICDVFS 26 #define R8A7791_CLK_I2C4 27 #define R8A7791_CLK_I2C3 28 #define R8A7791_CLK_I2C2 29 #define R8A7791_CLK_I2C1 30 #define R8A7791_CLK_I2C0 31 /* MSTP10 */ #define R8A7791_CLK_SSI_ALL 5 #define R8A7791_CLK_SSI9 6 #define R8A7791_CLK_SSI8 7 #define R8A7791_CLK_SSI7 8 #define R8A7791_CLK_SSI6 9 #define R8A7791_CLK_SSI5 10 #define R8A7791_CLK_SSI4 11 #define R8A7791_CLK_SSI3 12 #define R8A7791_CLK_SSI2 13 #define R8A7791_CLK_SSI1 14 #define R8A7791_CLK_SSI0 15 #define R8A7791_CLK_SCU_ALL 17 #define R8A7791_CLK_SCU_DVC1 18 #define R8A7791_CLK_SCU_DVC0 19 #define R8A7791_CLK_SCU_CTU1_MIX1 20 #define R8A7791_CLK_SCU_CTU0_MIX0 21 #define R8A7791_CLK_SCU_SRC9 22 #define R8A7791_CLK_SCU_SRC8 23 #define R8A7791_CLK_SCU_SRC7 24 #define R8A7791_CLK_SCU_SRC6 25 #define R8A7791_CLK_SCU_SRC5 26 #define R8A7791_CLK_SCU_SRC4 27 #define R8A7791_CLK_SCU_SRC3 28 #define R8A7791_CLK_SCU_SRC2 29 #define R8A7791_CLK_SCU_SRC1 30 #define R8A7791_CLK_SCU_SRC0 31 /* MSTP11 */ #define R8A7791_CLK_SCIFA3 6 #define R8A7791_CLK_SCIFA4 7 #define R8A7791_CLK_SCIFA5 8 #endif /* __DT_BINDINGS_CLOCK_R8A7791_H__ */ r>
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/dt-bindings/leds
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/dt-bindings/leds')