From ff2fc3e9e3edb918b6c6b288485c6cb267bc865e Mon Sep 17 00:00:00 2001 From: Jiri Slaby Date: Tue, 28 Mar 2006 17:04:00 -0500 Subject: ACPI: EC acpi-ecdt-uid-hack On some boxes ecdt uid may be equal to 0, so do not test for uids equality, so that fake handler will be unconditionally removed to allow loading the real one. See http://bugzilla.kernel.org/show_bug.cgi?id=6111 Signed-off-by: Jiri Slaby Cc: Luming Yu Signed-off-by: Andrew Morton Signed-off-by: Len Brown --- drivers/acpi/ec.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index eee0864ba30..e638168775b 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -991,7 +991,6 @@ static int acpi_ec_poll_add(struct acpi_device *device) int result = 0; acpi_status status = AE_OK; union acpi_ec *ec = NULL; - unsigned long uid; ACPI_FUNCTION_TRACE("acpi_ec_add"); @@ -1014,10 +1013,9 @@ static int acpi_ec_poll_add(struct acpi_device *device) acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, &ec->common.global_lock); - /* If our UID matches the UID for the ECDT-enumerated EC, - we now have the *real* EC info, so kill the makeshift one. */ - acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); - if (ec_ecdt && ec_ecdt->common.uid == uid) { + /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: + http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ + if (ec_ecdt) { acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler); @@ -1062,7 +1060,6 @@ static int acpi_ec_intr_add(struct acpi_device *device) int result = 0; acpi_status status = AE_OK; union acpi_ec *ec = NULL; - unsigned long uid; ACPI_FUNCTION_TRACE("acpi_ec_add"); @@ -1088,10 +1085,9 @@ static int acpi_ec_intr_add(struct acpi_device *device) acpi_evaluate_integer(ec->common.handle, "_GLK", NULL, &ec->common.global_lock); - /* If our UID matches the UID for the ECDT-enumerated EC, - we now have the *real* EC info, so kill the makeshift one. */ - acpi_evaluate_integer(ec->common.handle, "_UID", NULL, &uid); - if (ec_ecdt && ec_ecdt->common.uid == uid) { + /* XXX we don't test uids, because on some boxes ecdt uid = 0, see: + http://bugzilla.kernel.org/show_bug.cgi?id=6111 */ + if (ec_ecdt) { acpi_remove_address_space_handler(ACPI_ROOT_OBJECT, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler); -- cgit v1.2.3-70-g09d2 From f9a6ee1afb84fd767508428ec5d1df4fb60a03ad Mon Sep 17 00:00:00 2001 From: Rich Townsend Date: Mon, 19 Dec 2005 23:07:00 -0500 Subject: ACPI: replace spin_lock_irq with mutex for ec poll mode http://bugzilla.kernel.org/show_bug.cgi?id=5764 Signed-off-by: Luming Yu Signed-off-by: Len Brown --- drivers/acpi/ec.c | 51 +++++++++++++++++++++++++++++---------------------- 1 file changed, 29 insertions(+), 22 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index eee0864ba30..d2638209c60 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -116,7 +116,7 @@ union acpi_ec { struct acpi_generic_address command_addr; struct acpi_generic_address data_addr; unsigned long global_lock; - spinlock_t lock; + struct semaphore sem; } poll; }; @@ -323,7 +323,6 @@ static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data) { acpi_status status = AE_OK; int result = 0; - unsigned long flags = 0; u32 glk = 0; ACPI_FUNCTION_TRACE("acpi_ec_read"); @@ -339,8 +338,11 @@ static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data) return_VALUE(-ENODEV); } - spin_lock_irqsave(&ec->poll.lock, flags); - + if (down_interruptible(&ec->poll.sem)) { + result = -ERESTARTSYS; + goto end_nosem; + } + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_READ, &ec->common.command_addr); result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); @@ -358,8 +360,8 @@ static int acpi_ec_poll_read(union acpi_ec *ec, u8 address, u32 * data) *data, address)); end: - spin_unlock_irqrestore(&ec->poll.lock, flags); - + up(&ec->poll.sem); +end_nosem: if (ec->common.global_lock) acpi_release_global_lock(glk); @@ -370,7 +372,6 @@ static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data) { int result = 0; acpi_status status = AE_OK; - unsigned long flags = 0; u32 glk = 0; ACPI_FUNCTION_TRACE("acpi_ec_write"); @@ -384,8 +385,11 @@ static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data) return_VALUE(-ENODEV); } - spin_lock_irqsave(&ec->poll.lock, flags); - + if (down_interruptible(&ec->poll.sem)) { + result = -ERESTARTSYS; + goto end_nosem; + } + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_WRITE, &ec->common.command_addr); result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE); @@ -406,8 +410,8 @@ static int acpi_ec_poll_write(union acpi_ec *ec, u8 address, u8 data) data, address)); end: - spin_unlock_irqrestore(&ec->poll.lock, flags); - + up(&ec->poll.sem); +end_nosem: if (ec->common.global_lock) acpi_release_global_lock(glk); @@ -568,7 +572,6 @@ static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data) { int result = 0; acpi_status status = AE_OK; - unsigned long flags = 0; u32 glk = 0; ACPI_FUNCTION_TRACE("acpi_ec_query"); @@ -589,8 +592,11 @@ static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data) * Note that successful completion of the query causes the ACPI_EC_SCI * bit to be cleared (and thus clearing the interrupt source). */ - spin_lock_irqsave(&ec->poll.lock, flags); - + if (down_interruptible(&ec->poll.sem)) { + result = -ERESTARTSYS; + goto end_nosem; + } + acpi_hw_low_level_write(8, ACPI_EC_COMMAND_QUERY, &ec->common.command_addr); result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF); @@ -602,8 +608,8 @@ static int acpi_ec_poll_query(union acpi_ec *ec, u32 * data) result = -ENODATA; end: - spin_unlock_irqrestore(&ec->poll.lock, flags); - + up(&ec->poll.sem); +end_nosem: if (ec->common.global_lock) acpi_release_global_lock(glk); @@ -680,7 +686,6 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt) { union acpi_ec *ec = (union acpi_ec *)ec_cxt; u32 value = 0; - unsigned long flags = 0; static char object_name[5] = { '_', 'Q', '0', '0', '\0' }; const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' @@ -691,9 +696,11 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt) if (!ec_cxt) goto end; - spin_lock_irqsave(&ec->poll.lock, flags); + if (down_interruptible (&ec->poll.sem)) { + return_VOID; + } acpi_hw_low_level_read(8, &value, &ec->common.command_addr); - spin_unlock_irqrestore(&ec->poll.lock, flags); + up(&ec->poll.sem); /* TBD: Implement asynch events! * NOTE: All we care about are EC-SCI's. Other EC events are @@ -1005,7 +1012,7 @@ static int acpi_ec_poll_add(struct acpi_device *device) ec->common.handle = device->handle; ec->common.uid = -1; - spin_lock_init(&ec->poll.lock); + init_MUTEX(&ec->poll.sem); strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME); strcpy(acpi_device_class(device), ACPI_EC_CLASS); acpi_driver_data(device) = ec; @@ -1300,7 +1307,7 @@ acpi_fake_ecdt_poll_callback(acpi_handle handle, &ec_ecdt->common.gpe_bit); if (ACPI_FAILURE(status)) return status; - spin_lock_init(&ec_ecdt->poll.lock); + init_MUTEX(&ec_ecdt->poll.sem); ec_ecdt->common.global_lock = TRUE; ec_ecdt->common.handle = handle; @@ -1416,7 +1423,7 @@ static int __init acpi_ec_poll_get_real_ecdt(void) ec_ecdt->common.status_addr = ecdt_ptr->ec_control; ec_ecdt->common.data_addr = ecdt_ptr->ec_data; ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit; - spin_lock_init(&ec_ecdt->poll.lock); + init_MUTEX(&ec_ecdt->poll.sem); /* use the GL just to be safe */ ec_ecdt->common.global_lock = TRUE; ec_ecdt->common.uid = ecdt_ptr->uid; -- cgit v1.2.3-70-g09d2 From b8d35192c55fb055792ff0641408eaaec7c88988 Mon Sep 17 00:00:00 2001 From: Alexey Starikovskiy Date: Fri, 5 May 2006 03:23:00 -0400 Subject: ACPI: execute Notify() handlers on new thread http://bugzilla.kernel.org/show_bug.cgi?id=5534 Thanks to Peter Wainwright for isolating the issue. Thanks to Andi Kleen and Bob Moore for feedback. Thanks to Richard Mace and others for testing. Updates by Konstantin Karasyov. Signed-off-by: Konstantin Karasyov Signed-off-by: Len Brown --- drivers/acpi/ec.c | 5 ++-- drivers/acpi/osl.c | 80 +++++++++++++++++++++++++++++++++----------------- drivers/acpi/thermal.c | 3 +- 3 files changed, 56 insertions(+), 32 deletions(-) (limited to 'drivers/acpi/ec.c') diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 79b09d76c18..1e3222762bf 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -763,8 +763,7 @@ static u32 acpi_ec_gpe_poll_handler(void *data) acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR); - status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, - acpi_ec_gpe_query, ec); + status = acpi_os_execute(OSL_EC_POLL_HANDLER, acpi_ec_gpe_query, ec); if (status == AE_OK) return ACPI_INTERRUPT_HANDLED; @@ -799,7 +798,7 @@ static u32 acpi_ec_gpe_intr_handler(void *data) if (value & ACPI_EC_FLAG_SCI) { atomic_add(1, &ec->intr.pending_gpe); - status = acpi_os_queue_for_execution(OSD_PRIORITY_GPE, + status = acpi_os_execute(OSL_EC_BURST_HANDLER, acpi_ec_gpe_query, ec); return status == AE_OK ? ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED; diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 109c3f8ae7d..e80ca4730a4 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -37,6 +37,7 @@ #include #include #include +#include #include #include #include @@ -600,23 +601,41 @@ static void acpi_os_execute_deferred(void *context) return_VOID; } -acpi_status -acpi_os_queue_for_execution(u32 priority, +static int acpi_os_execute_thread(void *context) +{ + struct acpi_os_dpc *dpc = (struct acpi_os_dpc *)context; + if (dpc) { + dpc->function(dpc->context); + kfree(dpc); + } + do_exit(0); +} + +/******************************************************************************* + * + * FUNCTION: acpi_os_execute + * + * PARAMETERS: Type - Type of the callback + * Function - Function to be executed + * Context - Function parameters + * + * RETURN: Status + * + * DESCRIPTION: Depending on type, either queues function for deferred execution or + * immediately executes function on a separate thread. + * + ******************************************************************************/ + +acpi_status acpi_os_execute(acpi_execute_type type, acpi_osd_exec_callback function, void *context) { acpi_status status = AE_OK; struct acpi_os_dpc *dpc; struct work_struct *task; - - ACPI_FUNCTION_TRACE("os_queue_for_execution"); - - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, - "Scheduling function [%p(%p)] for deferred execution.\n", - function, context)); + struct task_struct *p; if (!function) - return_ACPI_STATUS(AE_BAD_PARAMETER); - + return AE_BAD_PARAMETER; /* * Allocate/initialize DPC structure. Note that this memory will be * freed by the callee. The kernel handles the tq_struct list in a @@ -627,30 +646,37 @@ acpi_os_queue_for_execution(u32 priority, * We can save time and code by allocating the DPC and tq_structs * from the same memory. */ - - dpc = - kmalloc(sizeof(struct acpi_os_dpc) + sizeof(struct work_struct), - GFP_ATOMIC); + if (type == OSL_NOTIFY_HANDLER) { + dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_KERNEL); + } else { + dpc = kmalloc(sizeof(struct acpi_os_dpc) + + sizeof(struct work_struct), GFP_ATOMIC); + } if (!dpc) - return_ACPI_STATUS(AE_NO_MEMORY); - + return AE_NO_MEMORY; dpc->function = function; dpc->context = context; - task = (void *)(dpc + 1); - INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); - - if (!queue_work(kacpid_wq, task)) { - ACPI_DEBUG_PRINT((ACPI_DB_ERROR, - "Call to queue_work() failed.\n")); - kfree(dpc); - status = AE_ERROR; + if (type == OSL_NOTIFY_HANDLER) { + p = kthread_create(acpi_os_execute_thread, dpc, "kacpid_notify"); + if (!IS_ERR(p)) { + wake_up_process(p); + } else { + status = AE_NO_MEMORY; + kfree(dpc); + } + } else { + task = (void *)(dpc + 1); + INIT_WORK(task, acpi_os_execute_deferred, (void *)dpc); + if (!queue_work(kacpid_wq, task)) { + status = AE_ERROR; + kfree(dpc); + } } - - return_ACPI_STATUS(status); + return status; } -EXPORT_SYMBOL(acpi_os_queue_for_execution); +EXPORT_SYMBOL(acpi_os_execute); void acpi_os_wait_events_complete(void *context) { diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 19f3ea48475..fba9c230a84 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -684,8 +684,7 @@ static void acpi_thermal_run(unsigned long data) { struct acpi_thermal *tz = (struct acpi_thermal *)data; if (!tz->zombie) - acpi_os_queue_for_execution(OSD_PRIORITY_GPE, - acpi_thermal_check, (void *)data); + acpi_os_execute(OSL_GPE_HANDLER, acpi_thermal_check, (void *)data); } static void acpi_thermal_check(void *data) -- cgit v1.2.3-70-g09d2