/** * Copyright (C) 2008, Creative Technology Ltd. All Rights Reserved. * * This source file is released under GPL v2 license (no other versions). * See the COPYING file included in the main directory of this source * distribution for the license terms and conditions. * * @File cthardware.c * * @Brief * This file contains the implementation of hardware access methord. * * @Author Liu Chun * @Date Jun 26 2008 * */ #include "cthardware.h" #include "cthw20k1.h" #include "cthw20k2.h" #include int create_hw_obj(struct pci_dev *pci, enum CHIPTYP chip_type, enum CTCARDS model, struct hw **rhw) { int err; switch (chip_type) { case ATC20K1: err = create_20k1_hw_obj(rhw); break; case ATC20K2: err = create_20k2_hw_obj(rhw); break; default: err = -ENODEV; break; } if (err) return err; (*rhw)->pci = pci; (*rhw)->chip_type = chip_type; (*rhw)->model = model; return 0; } int destroy_hw_obj(struct hw *hw) { int err; switch (hw->pci->device) { case 0x0005: /* 20k1 device */ err = destroy_20k1_hw_obj(hw); break; case 0x000B: /* 20k2 device */ err = destroy_20k2_hw_obj(hw); break; default: err = -ENODEV; break; } return err; } unsigned int get_field(unsigned int data, unsigned int field) { int i; if (WARN_ON(!field)) return 0; /* @field should always be greater than 0 */ for (i = 0; !(field & (1 << i)); ) i++; return (data & field) >> i; } void set_field(unsigned int *data, unsigned int field, unsigned int value) { int i; if (WARN_ON(!field)) return; /* @field should always be greater than 0 */ for (i = 0; !(field & (1 << i)); ) i++; *data = (*data & (~field)) | ((value << i) & field); } id=79c6f448c8b79c321e4a1f31f98194e4f6b6cae7'>refslogtreecommitdiff
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authorSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-30 19:27:10 -0500
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2017-01-31 09:13:49 -0500
commit79c6f448c8b79c321e4a1f31f98194e4f6b6cae7 (patch)
tree370efda701f03cccf21e02bb1fdd3b852547d75c /include/trace/events/v4l2.h
parent0c744ea4f77d72b3dcebb7a8f2684633ec79be88 (diff)
tracing: Fix hwlat kthread migration
The hwlat tracer creates a kernel thread at start of the tracer. It is pinned to a single CPU and will move to the next CPU after each period of running. If the user modifies the migration thread's affinity, it will not change after that happens. The original code created the thread at the first instance it was called, but later was changed to destroy the thread after the tracer was finished, and would not be created until the next instance of the tracer was established. The code that initialized the affinity was only called on the initial instantiation of the tracer. After that, it was not initialized, and the previous affinity did not match the current newly created one, making it appear that the user modified the thread's affinity when it did not, and the thread failed to migrate again. Cc: stable@vger.kernel.org Fixes: 0330f7aa8ee6 ("tracing: Have hwlat trace migrate across tracing_cpumask CPUs") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'include/trace/events/v4l2.h')