From 7c43312af8b363b679d1e7840858ff8d204a4d91 Mon Sep 17 00:00:00 2001 From: Lv Zheng Date: Thu, 5 Feb 2015 15:20:29 +0800 Subject: [PATCH] ACPICA: Events: Cleanup GPE dispatcher type obtaining code ACPICA commit 7926d5ca9452c87f866938dcea8f12e1efb58f89 There is an issue in acpi_install_gpe_handler() and acpi_remove_gpe_handler(). The code to obtain the GPE dispatcher type from the Handler->original_flags is wrong: if (((Handler->original_flags & ACPI_GPE_DISPATCH_METHOD) || (Handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) && ACPI_GPE_DISPATCH_NOTIFY is 0x03 and ACPI_GPE_DISPATCH_METHOD is 0x02, thus this statement is TRUE for the following dispatcher types: 0x01 (ACPI_GPE_DISPATCH_HANDLER): not expected 0x02 (ACPI_GPE_DISPATCH_METHOD): expected 0x03 (ACPI_GPE_DISPATCH_NOTIFY): expected There is no functional issue due to this because Handler->original_flags is only set in acpi_install_gpe_handler(), and an earlier checker has excluded the ACPI_GPE_DISPATCH_HANDLER: if ((gpe_event_info->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) { Status = AE_ALREADY_EXISTS; goto free_and_exit; } ... Handler->original_flags = (u8) (gpe_event_info->Flags & (ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK)); We need to clean this up before modifying the GPE dispatcher type values. In order to prevent such issue from happening in the future, this patch introduces ACPI_GPE_DISPATCH_TYPE() macro to be used to obtain the GPE dispatcher types. Lv Zheng. Link: https://github.com/acpica/acpica/commit/7926d5ca Signed-off-by: Lv Zheng Signed-off-by: David E. Box Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- drivers/acpi/acpica/evgpe.c | 4 ++-- drivers/acpi/acpica/evgpeblk.c | 6 +++--- drivers/acpi/acpica/evgpeinit.c | 4 ++-- drivers/acpi/acpica/evgpeutil.c | 8 +++----- drivers/acpi/acpica/evxface.c | 18 ++++++++++-------- drivers/acpi/acpica/evxfgpe.c | 6 +++--- drivers/acpi/acpica/hwgpe.c | 2 +- include/acpi/actypes.h | 1 + 8 files changed, 25 insertions(+), 24 deletions(-) diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c index 4a4f41a2822e..fccdfb2f73df 100644 --- a/drivers/acpi/acpica/evgpe.c +++ b/drivers/acpi/acpica/evgpe.c @@ -503,7 +503,7 @@ static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) /* Do the correct dispatch - normal method or implicit notify */ - switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) { + switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) { case ACPI_GPE_DISPATCH_NOTIFY: /* * Implicit notify. @@ -707,7 +707,7 @@ acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device, * If there is neither a handler nor a method, leave the GPE * disabled. */ - switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) { + switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) { case ACPI_GPE_DISPATCH_HANDLER: /* Invoke the installed handler (at interrupt level) */ diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c index d86699eea33c..d0a6024ae628 100644 --- a/drivers/acpi/acpica/evgpeblk.c +++ b/drivers/acpi/acpica/evgpeblk.c @@ -474,10 +474,10 @@ acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info, * Ignore GPEs that have no corresponding _Lxx/_Exx method * and GPEs that are used to wake the system */ - if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_NONE) - || ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) - == ACPI_GPE_DISPATCH_HANDLER) + || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == + ACPI_GPE_DISPATCH_HANDLER) || (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) { continue; } diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c index 7be928379879..ebfd40d77d10 100644 --- a/drivers/acpi/acpica/evgpeinit.c +++ b/drivers/acpi/acpica/evgpeinit.c @@ -401,7 +401,7 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle, return_ACPI_STATUS(AE_OK); } - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_HANDLER) { /* If there is already a handler, ignore this GPE method */ @@ -409,7 +409,7 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle, return_ACPI_STATUS(AE_OK); } - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_METHOD) { /* * If there is already a method, ignore this method. But check diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c index 3f1c5aa682a5..b1978122f6a9 100644 --- a/drivers/acpi/acpica/evgpeutil.c +++ b/drivers/acpi/acpica/evgpeutil.c @@ -324,7 +324,7 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, ACPI_GPE_REGISTER_WIDTH) + j]; - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_HANDLER) { /* Delete an installed handler block */ @@ -333,10 +333,8 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info, gpe_event_info->dispatch.handler = NULL; gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; - } else - if ((gpe_event_info-> - flags & ACPI_GPE_DISPATCH_MASK) == - ACPI_GPE_DISPATCH_NOTIFY) { + } else if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) + == ACPI_GPE_DISPATCH_NOTIFY) { /* Delete the implicit notification device list */ diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c index b6b0c2341d29..61b0261dd137 100644 --- a/drivers/acpi/acpica/evxface.c +++ b/drivers/acpi/acpica/evxface.c @@ -775,7 +775,7 @@ acpi_install_gpe_handler(acpi_handle gpe_device, /* Make sure that there isn't a handler there already */ - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_HANDLER) { status = AE_ALREADY_EXISTS; goto free_and_exit; @@ -793,9 +793,10 @@ acpi_install_gpe_handler(acpi_handle gpe_device, * automatically during initialization, in which case it has to be * disabled now to avoid spurious execution of the handler. */ - if (((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) || - (handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) && - gpe_event_info->runtime_count) { + if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == + ACPI_GPE_DISPATCH_METHOD) || + (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == + ACPI_GPE_DISPATCH_NOTIFY)) && gpe_event_info->runtime_count) { handler->originally_enabled = TRUE; (void)acpi_ev_remove_gpe_reference(gpe_event_info); @@ -880,7 +881,7 @@ acpi_remove_gpe_handler(acpi_handle gpe_device, /* Make sure that a handler is indeed installed */ - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != ACPI_GPE_DISPATCH_HANDLER) { status = AE_NOT_EXIST; goto unlock_and_exit; @@ -910,9 +911,10 @@ acpi_remove_gpe_handler(acpi_handle gpe_device, * enabled, it should be enabled at this point to restore the * post-initialization configuration. */ - if (((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) || - (handler->original_flags & ACPI_GPE_DISPATCH_NOTIFY)) && - handler->originally_enabled) { + if (((ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == + ACPI_GPE_DISPATCH_METHOD) || + (ACPI_GPE_DISPATCH_TYPE(handler->original_flags) == + ACPI_GPE_DISPATCH_NOTIFY)) && handler->originally_enabled) { (void)acpi_ev_add_gpe_reference(gpe_event_info); } diff --git a/drivers/acpi/acpica/evxfgpe.c b/drivers/acpi/acpica/evxfgpe.c index c637666e7174..b836139e13bb 100644 --- a/drivers/acpi/acpica/evxfgpe.c +++ b/drivers/acpi/acpica/evxfgpe.c @@ -132,7 +132,7 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) */ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); if (gpe_event_info) { - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != ACPI_GPE_DISPATCH_NONE) { status = acpi_ev_add_gpe_reference(gpe_event_info); } else { @@ -313,7 +313,7 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device, * known as an "implicit notify". Note: The GPE is assumed to be * level-triggered (for windows compatibility). */ - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_NONE) { /* * This is the first device for implicit notify on this GPE. @@ -327,7 +327,7 @@ acpi_setup_gpe_for_wake(acpi_handle wake_device, * If we already have an implicit notify on this GPE, add * this device to the notify list. */ - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == ACPI_GPE_DISPATCH_NOTIFY) { /* Ensure that the device is not already in the list */ diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c index 6a955a939843..ed85fe7494ae 100644 --- a/drivers/acpi/acpica/hwgpe.c +++ b/drivers/acpi/acpica/hwgpe.c @@ -225,7 +225,7 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info, /* GPE currently handled? */ - if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) != + if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) != ACPI_GPE_DISPATCH_NONE) { local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER; } diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index bbef17368e49..401705df516d 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -757,6 +757,7 @@ typedef u32 acpi_event_status; #define ACPI_GPE_DISPATCH_HANDLER (u8) 0x02 #define ACPI_GPE_DISPATCH_NOTIFY (u8) 0x03 #define ACPI_GPE_DISPATCH_MASK (u8) 0x03 +#define ACPI_GPE_DISPATCH_TYPE(flags) ((u8) ((flags) & ACPI_GPE_DISPATCH_MASK)) #define ACPI_GPE_LEVEL_TRIGGERED (u8) 0x04 #define ACPI_GPE_EDGE_TRIGGERED (u8) 0x00 -- 2.39.5