From 77e766099efc29d8b01db4b8244ff64fa3d3d0ca Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 7 Jul 2008 03:33:34 +0200 Subject: ACPI: Introduce acpi_device_sleep_wake function The currect ACPI code attempts to execute _PSW at three different places and in one of them only it tries to execute _DSW before _PSW, which is inconsistent with the other two cases. Move the execution of _DSW and _PSW into a separate function called acpi_device_sleep_wake() and call it wherever appropriate instead of executing _DSW and/or _PSW directly. Signed-off-by: Rafael J. Wysocki Acked-by: Pavel Machek Signed-off-by: Jesse Barnes --- drivers/acpi/scan.c | 42 ++++++------------------------------------ 1 file changed, 6 insertions(+), 36 deletions(-) (limited to 'drivers/acpi/scan.c') diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 6d85289f1c1..f276890cfde 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -691,9 +691,7 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) acpi_status status = 0; struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; union acpi_object *package = NULL; - union acpi_object in_arg[3]; - struct acpi_object_list arg_list = { 3, in_arg }; - acpi_status psw_status = AE_OK; + int psw_error; struct acpi_device_id button_device_ids[] = { {"PNP0C0D", 0}, @@ -725,39 +723,11 @@ static int acpi_bus_get_wakeup_device_flags(struct acpi_device *device) * So it is necessary to call _DSW object first. Only when it is not * present will the _PSW object used. */ - /* - * Three agruments are needed for the _DSW object. - * Argument 0: enable/disable the wake capabilities - * When _DSW object is called to disable the wake capabilities, maybe - * the first argument is filled. The value of the other two agruments - * is meaningless. - */ - in_arg[0].type = ACPI_TYPE_INTEGER; - in_arg[0].integer.value = 0; - in_arg[1].type = ACPI_TYPE_INTEGER; - in_arg[1].integer.value = 0; - in_arg[2].type = ACPI_TYPE_INTEGER; - in_arg[2].integer.value = 0; - psw_status = acpi_evaluate_object(device->handle, "_DSW", - &arg_list, NULL); - if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND)) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in evaluate _DSW\n")); - /* - * When the _DSW object is not present, OSPM will call _PSW object. - */ - if (psw_status == AE_NOT_FOUND) { - /* - * Only one agruments is required for the _PSW object. - * agrument 0: enable/disable the wake capabilities - */ - arg_list.count = 1; - in_arg[0].integer.value = 0; - psw_status = acpi_evaluate_object(device->handle, "_PSW", - &arg_list, NULL); - if (ACPI_FAILURE(psw_status) && (psw_status != AE_NOT_FOUND)) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "error in " - "evaluate _PSW\n")); - } + psw_error = acpi_device_sleep_wake(device, 0, 0, 0); + if (psw_error) + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "error in _DSW or _PSW evaluation\n")); + /* Power button, Lid switch always enable wakeup */ if (!acpi_match_device_ids(device, button_device_ids)) device->wakeup.flags.run_wake = 1; -- cgit v1.2.3-70-g09d2 From 26d46867b7d27f68a446b073dac7817721ae4c8f Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Tue, 29 Apr 2008 02:35:48 -0400 Subject: fix a deadlock issue when poking "eject" file "/sys/devices/LNXSYSTM:00/.../eject" is used to evaluate _EJx method and eject a device in user space. But system hangs when poking the "eject" file because that the device hot-removal code invoke the driver .remove method which will try to remove the "eject" file as a result. Queues the hot-removal function for deferred execution in this patch. http://bugzilla.kernel.org/show_bug.cgi?id=9772 Signed-off-by: Zhang Rui Signed-off-by: Len Brown Signed-off-by: Andi Kleen --- drivers/acpi/scan.c | 56 ++++++++++++++++++++++++++++++----------------------- 1 file changed, 32 insertions(+), 24 deletions(-) (limited to 'drivers/acpi/scan.c') diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 6d85289f1c1..9a84ed250d9 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -6,6 +6,7 @@ #include #include #include +#include #include #include /* for acpi_ex_eisa_id_to_string() */ @@ -92,17 +93,37 @@ acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, cha } static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); -static int acpi_eject_operation(acpi_handle handle, int lockable) +static int acpi_bus_hot_remove_device(void *context) { + struct acpi_device *device; + acpi_handle handle = context; struct acpi_object_list arg_list; union acpi_object arg; acpi_status status = AE_OK; - /* - * TBD: evaluate _PS3? - */ + if (acpi_bus_get_device(handle, &device)) + return 0; - if (lockable) { + if (!device) + return 0; + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Hot-removing device %s...\n", device->dev.bus_id)); + + + if (acpi_bus_trim(device, 1)) { + ACPI_DEBUG_PRINT((ACPI_DB_ERROR, + "Removing device failed\n")); + return -1; + } + + /* power off device */ + status = acpi_evaluate_object(handle, "_PS3", NULL, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) + ACPI_DEBUG_PRINT((ACPI_DB_WARN, + "Power-off device failed\n")); + + if (device->flags.lockable) { arg_list.count = 1; arg_list.pointer = &arg; arg.type = ACPI_TYPE_INTEGER; @@ -118,24 +139,19 @@ static int acpi_eject_operation(acpi_handle handle, int lockable) /* * TBD: _EJD support. */ - status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); - if (ACPI_FAILURE(status)) { - return (-ENODEV); - } + if (ACPI_FAILURE(status)) + return -ENODEV; - return (0); + return 0; } static ssize_t acpi_eject_store(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { - int result; int ret = count; - int islockable; acpi_status status; - acpi_handle handle; acpi_object_type type = 0; struct acpi_device *acpi_device = to_acpi_device(d); @@ -154,17 +170,9 @@ acpi_eject_store(struct device *d, struct device_attribute *attr, goto err; } - islockable = acpi_device->flags.lockable; - handle = acpi_device->handle; - - result = acpi_bus_trim(acpi_device, 1); - - if (!result) - result = acpi_eject_operation(handle, islockable); - - if (result) { - ret = -EBUSY; - } + /* remove the device in another thread to fix the deadlock issue */ + ret = kernel_thread(acpi_bus_hot_remove_device, + acpi_device->handle, SIGCHLD); err: return ret; } -- cgit v1.2.3-70-g09d2 From 74523c901342a773ddd9f14c14539ec3d4197ecf Mon Sep 17 00:00:00 2001 From: Alok N Kataria Date: Fri, 13 Jun 2008 12:54:24 -0400 Subject: ACPI: fix checkpatch.pl complaints in scan.c http://bugzilla.kernel.org/show_bug.cgi?id=9772 Signed-off-by: Alok N Kataria Signed-off-by: Len Brown Signed-off-by: Andi Kleen --- drivers/acpi/scan.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) (limited to 'drivers/acpi/scan.c') diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 9a84ed250d9..5b049cd7955 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -6,7 +6,8 @@ #include #include #include -#include +#include +#include #include #include /* for acpi_ex_eisa_id_to_string() */ @@ -154,6 +155,7 @@ acpi_eject_store(struct device *d, struct device_attribute *attr, acpi_status status; acpi_object_type type = 0; struct acpi_device *acpi_device = to_acpi_device(d); + struct task_struct *task; if ((!count) || (buf[0] != '1')) { return -EINVAL; @@ -171,9 +173,11 @@ acpi_eject_store(struct device *d, struct device_attribute *attr, } /* remove the device in another thread to fix the deadlock issue */ - ret = kernel_thread(acpi_bus_hot_remove_device, - acpi_device->handle, SIGCHLD); - err: + task = kthread_run(acpi_bus_hot_remove_device, + acpi_device->handle, "acpi_hot_remove_device"); + if (IS_ERR(task)) + ret = PTR_ERR(task); +err: return ret; } -- cgit v1.2.3-70-g09d2