--- zzzz-none-000/linux-3.10.107/drivers/acpi/sysfs.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/drivers/acpi/sysfs.c 2021-02-04 17:41:59.000000000 +0000 @@ -5,15 +5,13 @@ #include #include #include -#include +#include #include "internal.h" #define _COMPONENT ACPI_SYSTEM_COMPONENT ACPI_MODULE_NAME("sysfs"); -#define PREFIX "ACPI: " - #ifdef CONFIG_ACPI_DEBUG /* * ACPI debug sysfs I/F, including: @@ -71,6 +69,8 @@ ACPI_DEBUG_INIT(ACPI_LV_INIT), ACPI_DEBUG_INIT(ACPI_LV_DEBUG_OBJECT), ACPI_DEBUG_INIT(ACPI_LV_INFO), + ACPI_DEBUG_INIT(ACPI_LV_REPAIR), + ACPI_DEBUG_INIT(ACPI_LV_TRACE_POINT), ACPI_DEBUG_INIT(ACPI_LV_INIT_NAMES), ACPI_DEBUG_INIT(ACPI_LV_PARSE), @@ -164,55 +164,116 @@ module_param_cb(debug_layer, ¶m_ops_debug_layer, &acpi_dbg_layer, 0644); module_param_cb(debug_level, ¶m_ops_debug_level, &acpi_dbg_level, 0644); -static char trace_method_name[6]; -module_param_string(trace_method_name, trace_method_name, 6, 0644); -static unsigned int trace_debug_layer; -module_param(trace_debug_layer, uint, 0644); -static unsigned int trace_debug_level; -module_param(trace_debug_level, uint, 0644); +static char trace_method_name[1024]; -static int param_set_trace_state(const char *val, struct kernel_param *kp) +int param_set_trace_method_name(const char *val, const struct kernel_param *kp) { - int result = 0; + u32 saved_flags = 0; + bool is_abs_path = true; - if (!strncmp(val, "enable", sizeof("enable") - 1)) { - result = acpi_debug_trace(trace_method_name, trace_debug_level, - trace_debug_layer, 0); - if (result) - result = -EBUSY; - goto exit; - } - - if (!strncmp(val, "disable", sizeof("disable") - 1)) { - int name = 0; - result = acpi_debug_trace((char *)&name, trace_debug_level, - trace_debug_layer, 0); - if (result) - result = -EBUSY; - goto exit; - } - - if (!strncmp(val, "1", 1)) { - result = acpi_debug_trace(trace_method_name, trace_debug_level, - trace_debug_layer, 1); - if (result) - result = -EBUSY; - goto exit; + if (*val != '\\') + is_abs_path = false; + + if ((is_abs_path && strlen(val) > 1023) || + (!is_abs_path && strlen(val) > 1022)) { + pr_err("%s: string parameter too long\n", kp->name); + return -ENOSPC; + } + + /* + * It's not safe to update acpi_gbl_trace_method_name without + * having the tracer stopped, so we save the original tracer + * state and disable it. + */ + saved_flags = acpi_gbl_trace_flags; + (void)acpi_debug_trace(NULL, + acpi_gbl_trace_dbg_level, + acpi_gbl_trace_dbg_layer, + 0); + + /* This is a hack. We can't kmalloc in early boot. */ + if (is_abs_path) + strcpy(trace_method_name, val); + else { + trace_method_name[0] = '\\'; + strcpy(trace_method_name+1, val); } - result = -EINVAL; -exit: - return result; + /* Restore the original tracer state */ + (void)acpi_debug_trace(trace_method_name, + acpi_gbl_trace_dbg_level, + acpi_gbl_trace_dbg_layer, + saved_flags); + + return 0; +} + +static int param_get_trace_method_name(char *buffer, const struct kernel_param *kp) +{ + return scnprintf(buffer, PAGE_SIZE, "%s", acpi_gbl_trace_method_name); +} + +static const struct kernel_param_ops param_ops_trace_method = { + .set = param_set_trace_method_name, + .get = param_get_trace_method_name, +}; + +static const struct kernel_param_ops param_ops_trace_attrib = { + .set = param_set_uint, + .get = param_get_uint, +}; + +module_param_cb(trace_method_name, ¶m_ops_trace_method, &trace_method_name, 0644); +module_param_cb(trace_debug_layer, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_layer, 0644); +module_param_cb(trace_debug_level, ¶m_ops_trace_attrib, &acpi_gbl_trace_dbg_level, 0644); + +static int param_set_trace_state(const char *val, struct kernel_param *kp) +{ + acpi_status status; + const char *method = trace_method_name; + u32 flags = 0; + +/* So "xxx-once" comparison should go prior than "xxx" comparison */ +#define acpi_compare_param(val, key) \ + strncmp((val), (key), sizeof(key) - 1) + + if (!acpi_compare_param(val, "enable")) { + method = NULL; + flags = ACPI_TRACE_ENABLED; + } else if (!acpi_compare_param(val, "disable")) + method = NULL; + else if (!acpi_compare_param(val, "method-once")) + flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT; + else if (!acpi_compare_param(val, "method")) + flags = ACPI_TRACE_ENABLED; + else if (!acpi_compare_param(val, "opcode-once")) + flags = ACPI_TRACE_ENABLED | ACPI_TRACE_ONESHOT | ACPI_TRACE_OPCODE; + else if (!acpi_compare_param(val, "opcode")) + flags = ACPI_TRACE_ENABLED | ACPI_TRACE_OPCODE; + else + return -EINVAL; + + status = acpi_debug_trace(method, + acpi_gbl_trace_dbg_level, + acpi_gbl_trace_dbg_layer, + flags); + if (ACPI_FAILURE(status)) + return -EBUSY; + + return 0; } static int param_get_trace_state(char *buffer, struct kernel_param *kp) { - if (!acpi_gbl_trace_method_name) + if (!(acpi_gbl_trace_flags & ACPI_TRACE_ENABLED)) return sprintf(buffer, "disable"); else { - if (acpi_gbl_trace_flags & 1) - return sprintf(buffer, "1"); - else + if (acpi_gbl_trace_method_name) { + if (acpi_gbl_trace_flags & ACPI_TRACE_ONESHOT) + return sprintf(buffer, "method-once"); + else + return sprintf(buffer, "method"); + } else return sprintf(buffer, "enable"); } return 0; @@ -226,7 +287,7 @@ /* /sys/modules/acpi/parameters/aml_debug_output */ module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, - bool, 0644); + byte, 0644); MODULE_PARM_DESC(aml_debug_output, "To enable/disable the ACPI Debug Object output."); @@ -309,7 +370,7 @@ sprintf(table_attr->name + ACPI_NAME_SIZE, "%d", table_attr->instance); - table_attr->attr.size = 0; + table_attr->attr.size = table_header->length; table_attr->attr.read = acpi_table_show; table_attr->attr.attr.name = table_attr->name; table_attr->attr.attr.mode = 0400; @@ -354,8 +415,9 @@ { struct acpi_table_attr *table_attr; struct acpi_table_header *table_header = NULL; - int table_index = 0; - int result; + int table_index; + acpi_status status; + int ret; tables_kobj = kobject_create_and_add("tables", acpi_kobj); if (!tables_kobj) @@ -365,33 +427,34 @@ if (!dynamic_tables_kobj) goto err_dynamic_tables; - do { - result = acpi_get_table_by_index(table_index, &table_header); - if (!result) { - table_index++; - table_attr = NULL; - table_attr = - kzalloc(sizeof(struct acpi_table_attr), GFP_KERNEL); - if (!table_attr) - return -ENOMEM; - - acpi_table_attr_init(table_attr, table_header); - result = - sysfs_create_bin_file(tables_kobj, - &table_attr->attr); - if (result) { - kfree(table_attr); - return result; - } else - list_add_tail(&table_attr->node, - &acpi_table_attr_list); + for (table_index = 0;; table_index++) { + status = acpi_get_table_by_index(table_index, &table_header); + + if (status == AE_BAD_PARAMETER) + break; + + if (ACPI_FAILURE(status)) + continue; + + table_attr = NULL; + table_attr = kzalloc(sizeof(*table_attr), GFP_KERNEL); + if (!table_attr) + return -ENOMEM; + + acpi_table_attr_init(table_attr, table_header); + ret = sysfs_create_bin_file(tables_kobj, &table_attr->attr); + if (ret) { + kfree(table_attr); + return ret; } - } while (!result); + list_add_tail(&table_attr->node, &acpi_table_attr_list); + } + kobject_uevent(tables_kobj, KOBJ_ADD); kobject_uevent(dynamic_tables_kobj, KOBJ_ADD); - result = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); + status = acpi_install_table_handler(acpi_sysfs_table_handler, NULL); - return result == AE_OK ? 0 : -EINVAL; + return ACPI_FAILURE(status) ? -EINVAL : 0; err_dynamic_tables: kobject_put(tables_kobj); err: @@ -526,7 +589,7 @@ acpi_irq_not_handled; all_counters[num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_GPE].count = acpi_gpe_count; - size = sprintf(buf, "%8d", all_counters[index].count); + size = sprintf(buf, "%8u", all_counters[index].count); /* "gpe_all" or "sci" */ if (index >= num_gpes + ACPI_NUM_FIXED_EVENTS) @@ -536,7 +599,7 @@ if (result) goto end; - if (!(status & ACPI_EVENT_FLAG_HANDLE)) + if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) size += sprintf(buf + size, " invalid"); else if (status & ACPI_EVENT_FLAG_ENABLED) size += sprintf(buf + size, " enabled"); @@ -563,6 +626,7 @@ acpi_event_status status; acpi_handle handle; int result = 0; + unsigned long tmp; if (index == num_gpes + ACPI_NUM_FIXED_EVENTS + COUNT_SCI) { int i; @@ -579,7 +643,7 @@ if (result) goto end; - if (!(status & ACPI_EVENT_FLAG_HANDLE)) { + if (!(status & ACPI_EVENT_FLAG_HAS_HANDLER)) { printk(KERN_WARNING PREFIX "Can not change Invalid GPE/Fixed Event status\n"); return -EINVAL; @@ -595,8 +659,10 @@ else if (!strcmp(buf, "clear\n") && (status & ACPI_EVENT_FLAG_SET)) result = acpi_clear_gpe(handle, index); + else if (!kstrtoul(buf, 0, &tmp)) + all_counters[index].count = tmp; else - all_counters[index].count = strtoul(buf, NULL, 0); + result = -EINVAL; } else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) { int event = index - num_gpes; if (!strcmp(buf, "disable\n") && @@ -608,8 +674,10 @@ else if (!strcmp(buf, "clear\n") && (status & ACPI_EVENT_FLAG_SET)) result = acpi_clear_event(event); + else if (!kstrtoul(buf, 0, &tmp)) + all_counters[index].count = tmp; else - all_counters[index].count = strtoul(buf, NULL, 0); + result = -EINVAL; } else all_counters[index].count = strtoul(buf, NULL, 0); @@ -676,10 +744,9 @@ else sprintf(buffer, "bug%02X", i); - name = kzalloc(strlen(buffer) + 1, GFP_KERNEL); + name = kstrdup(buffer, GFP_KERNEL); if (name == NULL) goto fail; - strncpy(name, buffer, strlen(buffer) + 1); sysfs_attr_init(&counter_attrs[i].attr); counter_attrs[i].attr.name = name; @@ -762,13 +829,8 @@ if (!hotplug_kobj) goto err_out; - kobject_init(&hotplug->kobj, &acpi_hotplug_profile_ktype); - error = kobject_set_name(&hotplug->kobj, "%s", name); - if (error) - goto err_out; - - hotplug->kobj.parent = hotplug_kobj; - error = kobject_add(&hotplug->kobj, hotplug_kobj, NULL); + error = kobject_init_and_add(&hotplug->kobj, + &acpi_hotplug_profile_ktype, hotplug_kobj, "%s", name); if (error) goto err_out; @@ -779,6 +841,33 @@ pr_err(PREFIX "Unable to add hotplug profile '%s'\n", name); } +static ssize_t force_remove_show(struct kobject *kobj, + struct kobj_attribute *attr, char *buf) +{ + return sprintf(buf, "%d\n", !!acpi_force_hot_remove); +} + +static ssize_t force_remove_store(struct kobject *kobj, + struct kobj_attribute *attr, + const char *buf, size_t size) +{ + bool val; + int ret; + + ret = strtobool(buf, &val); + if (ret < 0) + return ret; + + lock_device_hotplug(); + acpi_force_hot_remove = val; + unlock_device_hotplug(); + return size; +} + +static const struct kobj_attribute force_remove_attr = + __ATTR(force_remove, S_IRUGO | S_IWUSR, force_remove_show, + force_remove_store); + int __init acpi_sysfs_init(void) { int result; @@ -788,6 +877,13 @@ return result; hotplug_kobj = kobject_create_and_add("hotplug", acpi_kobj); + if (!hotplug_kobj) + return -ENOMEM; + + result = sysfs_create_file(hotplug_kobj, &force_remove_attr.attr); + if (result) + return result; + result = sysfs_create_file(acpi_kobj, &pm_profile_attr.attr); return result; }