3 files changed, 150 insertions, 58 deletions

diff --git a/drivers/acpi/events/evevent.c b/drivers/acpi/events/evevent.c
index 842d1e3fb37b..9522c643b88b 100644
--- a/drivers/acpi/events/evevent.c
+++ b/drivers/acpi/events/evevent.c
@@ -100,6 +100,48 @@ acpi_status acpi_ev_initialize_events(void)
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_ev_install_fadt_gpes
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Completes initialization of the FADT-defined GPE blocks
+ *              (0 and 1). This causes the _PRW methods to be run, so the HW
+ *              must be fully initialized at this point, including global lock
+ *              support.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_ev_install_fadt_gpes(void)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE("ev_install_fadt_gpes");
+
+        /* Namespace must be locked */
+
+        status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
+        if (ACPI_FAILURE(status)) {
+                return (status);
+        }
+
+        /* FADT GPE Block 0 */
+
+        (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
+                                           acpi_gbl_gpe_fadt_blocks[0]);
+
+        /* FADT GPE Block 1 */
+
+        (void)acpi_ev_initialize_gpe_block(acpi_gbl_fadt_gpe_device,
+                                           acpi_gbl_gpe_fadt_blocks[1]);
+
+        (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
+        return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_ev_install_xrupt_handlers
  *
  * PARAMETERS:  None
diff --git a/drivers/acpi/events/evgpeblk.c b/drivers/acpi/events/evgpeblk.c
index 7ca10c5f2914..8efca2eac27e 100644
--- a/drivers/acpi/events/evgpeblk.c
+++ b/drivers/acpi/events/evgpeblk.c
@@ -78,7 +78,7 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block);
  *
  * RETURN:      TRUE if the gpe_event is valid
  *
- * DESCRIPTION: Validate a GPE event.  DO NOT CALL FROM INTERRUPT LEVEL.
+ * DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
  *              Should be called only when the GPE lists are semaphore locked
  *              and not subject to change.
  *
@@ -264,7 +264,7 @@ acpi_ev_save_method_info(acpi_handle obj_handle,
          * 2) Edge/Level determination is based on the 2nd character
          *    of the method name
          *
-         * NOTE: Default GPE type is RUNTIME.  May be changed later to WAKE
+         * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE
          * if a _PRW object is found that points to this GPE.
          */
         switch (name[1]) {
@@ -313,14 +313,14 @@ acpi_ev_save_method_info(acpi_handle obj_handle,
 
         /*
          * Now we can add this information to the gpe_event_info block
-         * for use during dispatch of this GPE.  Default type is RUNTIME, although
+         * for use during dispatch of this GPE. Default type is RUNTIME, although
          * this may change when the _PRW methods are executed later.
          */
         gpe_event_info =
             &gpe_block->event_info[gpe_number - gpe_block->block_base_number];
 
-        gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD |
-                                      ACPI_GPE_TYPE_RUNTIME);
+        gpe_event_info->flags = (u8)
+            (type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME);
 
         gpe_event_info->dispatch.method_node =
             (struct acpi_namespace_node *)obj_handle;
@@ -341,11 +341,11 @@ acpi_ev_save_method_info(acpi_handle obj_handle,
  *
  * PARAMETERS:  Callback from walk_namespace
  *
- * RETURN:      Status.  NOTE: We ignore errors so that the _PRW walk is
+ * RETURN:      Status. NOTE: We ignore errors so that the _PRW walk is
  *              not aborted on a single _PRW failure.
  *
  * DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
- *              Device.  Run the _PRW method.  If present, extract the GPE
+ *              Device. Run the _PRW method. If present, extract the GPE
  *              number and mark the GPE as a WAKE GPE.
  *
  ******************************************************************************/
@@ -443,6 +443,7 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
 
                 gpe_event_info->flags &=
                     ~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED);
+
                 status =
                     acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE);
                 if (ACPI_FAILURE(status)) {
@@ -466,7 +467,7 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
  *
  * RETURN:      A GPE interrupt block
  *
- * DESCRIPTION: Get or Create a GPE interrupt block.  There is one interrupt
+ * DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
  *              block per unique interrupt level used for GPEs.
  *              Should be called only when the GPE lists are semaphore locked
  *              and not subject to change.
@@ -566,8 +567,9 @@ acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
 
         /* Disable this interrupt */
 
-        status = acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
-                                                  acpi_ev_gpe_xrupt_handler);
+        status =
+            acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
+                                             acpi_ev_gpe_xrupt_handler);
         if (ACPI_FAILURE(status)) {
                 return_ACPI_STATUS(status);
         }
@@ -750,7 +752,7 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
 
         /*
          * Allocate the GPE event_info block. There are eight distinct GPEs
-         * per register.  Initialization to zeros is sufficient.
+         * per register. Initialization to zeros is sufficient.
          */
         gpe_event_info = ACPI_MEM_CALLOCATE(((acpi_size) gpe_block->
                                              register_count *
@@ -769,9 +771,9 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
         gpe_block->event_info = gpe_event_info;
 
         /*
-         * Initialize the GPE Register and Event structures.  A goal of these
+         * Initialize the GPE Register and Event structures. A goal of these
          * tables is to hide the fact that there are two separate GPE register sets
-         * in a given gpe hardware block, the status registers occupy the first half,
+         * in a given GPE hardware block, the status registers occupy the first half,
          * and the enable registers occupy the second half.
          */
         this_register = gpe_register_info;
@@ -812,11 +814,8 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
                         this_event++;
                 }
 
-                /*
-                 * Clear the status/enable registers.  Note that status registers
-                 * are cleared by writing a '1', while enable registers are cleared
-                 * by writing a '0'.
-                 */
+                /* Disable all GPEs within this register */
+
                 status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0x00,
                                                  &this_register->
                                                  enable_address);
@@ -824,6 +823,8 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
                         goto error_exit;
                 }
 
+                /* Clear any pending GPE events within this register */
+
                 status = acpi_hw_low_level_write(ACPI_GPE_REGISTER_WIDTH, 0xFF,
                                                  &this_register->
                                                  status_address);
@@ -860,7 +861,9 @@ acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Create and Install a block of GPE registers
+ * DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
+ *              the block are disabled at exit.
+ *              Note: Assumes namespace is locked.
  *
  ******************************************************************************/
 
@@ -872,14 +875,8 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                          u32 interrupt_number,
                          struct acpi_gpe_block_info **return_gpe_block)
 {
-        struct acpi_gpe_block_info *gpe_block;
-        struct acpi_gpe_event_info *gpe_event_info;
-        acpi_native_uint i;
-        acpi_native_uint j;
-        u32 wake_gpe_count;
-        u32 gpe_enabled_count;
         acpi_status status;
-        struct acpi_gpe_walk_info gpe_info;
+        struct acpi_gpe_block_info *gpe_block;
 
         ACPI_FUNCTION_TRACE("ev_create_gpe_block");
 
@@ -896,22 +893,24 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
 
         /* Initialize the new GPE block */
 
+        gpe_block->node = gpe_device;
         gpe_block->register_count = register_count;
         gpe_block->block_base_number = gpe_block_base_number;
-        gpe_block->node = gpe_device;
 
         ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address,
                     sizeof(struct acpi_generic_address));
 
-        /* Create the register_info and event_info sub-structures */
-
+        /*
+         * Create the register_info and event_info sub-structures
+         * Note: disables and clears all GPEs in the block
+         */
         status = acpi_ev_create_gpe_info_blocks(gpe_block);
         if (ACPI_FAILURE(status)) {
                 ACPI_MEM_FREE(gpe_block);
                 return_ACPI_STATUS(status);
         }
 
-        /* Install the new block in the global list(s) */
+        /* Install the new block in the global lists */
 
         status = acpi_ev_install_gpe_block(gpe_block, interrupt_number);
         if (ACPI_FAILURE(status)) {
@@ -926,16 +925,70 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                                         acpi_ev_save_method_info, gpe_block,
                                         NULL);
 
+        /* Return the new block */
+
+        if (return_gpe_block) {
+                (*return_gpe_block) = gpe_block;
+        }
+
+        ACPI_DEBUG_PRINT((ACPI_DB_INIT,
+                          "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
+                          (u32) gpe_block->block_base_number,
+                          (u32) (gpe_block->block_base_number +
+                                 ((gpe_block->register_count *
+                                   ACPI_GPE_REGISTER_WIDTH) - 1)),
+                          gpe_device->name.ascii, gpe_block->register_count,
+                          interrupt_number));
+
+        return_ACPI_STATUS(AE_OK);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_ev_initialize_gpe_block
+ *
+ * PARAMETERS:  gpe_device          - Handle to the parent GPE block
+ *              gpe_block           - Gpe Block info
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Initialize and enable a GPE block. First find and run any
+ *              _PRT methods associated with the block, then enable the
+ *              appropriate GPEs.
+ *              Note: Assumes namespace is locked.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
+                             struct acpi_gpe_block_info *gpe_block)
+{
+        acpi_status status;
+        struct acpi_gpe_event_info *gpe_event_info;
+        struct acpi_gpe_walk_info gpe_info;
+        u32 wake_gpe_count;
+        u32 gpe_enabled_count;
+        acpi_native_uint i;
+        acpi_native_uint j;
+
+        ACPI_FUNCTION_TRACE("ev_initialize_gpe_block");
+
+        /* Ignore a null GPE block (e.g., if no GPE block 1 exists) */
+
+        if (!gpe_block) {
+                return_ACPI_STATUS(AE_OK);
+        }
+
         /*
-         * Runtime option: Should Wake GPEs be enabled at runtime?  The default
-         * is No, they should only be enabled just as the machine goes to sleep.
+         * Runtime option: Should wake GPEs be enabled at runtime?  The default
+         * is no, they should only be enabled just as the machine goes to sleep.
          */
         if (acpi_gbl_leave_wake_gpes_disabled) {
                 /*
-                 * Differentiate RUNTIME vs WAKE GPEs, via the _PRW control methods.
-                 * (Each GPE that has one or more _PRWs that reference it is by
-                 * definition a WAKE GPE and will not be enabled while the machine
-                 * is running.)
+                 * Differentiate runtime vs wake GPEs, via the _PRW control methods.
+                 * Each GPE that has one or more _PRWs that reference it is by
+                 * definition a wake GPE and will not be enabled while the machine
+                 * is running.
                  */
                 gpe_info.gpe_block = gpe_block;
                 gpe_info.gpe_device = gpe_device;
@@ -948,9 +1001,12 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
         }
 
         /*
-         * Enable all GPEs in this block that are 1) "runtime" or "run/wake" GPEs,
-         * and 2) have a corresponding _Lxx or _Exx method.  All other GPEs must
-         * be enabled via the acpi_enable_gpe() external interface.
+         * Enable all GPEs in this block that have these attributes:
+         * 1) are "runtime" or "run/wake" GPEs, and
+         * 2) have a corresponding _Lxx or _Exx method
+         *
+         * Any other GPEs within this block must be enabled via the acpi_enable_gpe()
+         * external interface.
          */
         wake_gpe_count = 0;
         gpe_enabled_count = 0;
@@ -976,32 +1032,19 @@ acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
                 }
         }
 
-        /* Dump info about this GPE block */
-
-        ACPI_DEBUG_PRINT((ACPI_DB_INIT,
-                          "GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
-                          (u32) gpe_block->block_base_number,
-                          (u32) (gpe_block->block_base_number +
-                                 ((gpe_block->register_count *
-                                   ACPI_GPE_REGISTER_WIDTH) - 1)),
-                          gpe_device->name.ascii, gpe_block->register_count,
-                          interrupt_number));
-
-        /* Enable all valid GPEs found above */
-
-        status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block);
-
         ACPI_DEBUG_PRINT((ACPI_DB_INIT,
                           "Found %u Wake, Enabled %u Runtime GPEs in this block\n",
                           wake_gpe_count, gpe_enabled_count));
 
-        /* Return the new block */
+        /* Enable all valid runtime GPEs found above */
 
-        if (return_gpe_block) {
-                (*return_gpe_block) = gpe_block;
+        status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block);
+        if (ACPI_FAILURE(status)) {
+                ACPI_REPORT_ERROR(("Could not enable GPEs in gpe_block %p\n",
+                                   gpe_block));
         }
 
-        return_ACPI_STATUS(AE_OK);
+        return_ACPI_STATUS(status);
 }
 
 /*******************************************************************************
diff --git a/drivers/acpi/events/evxfevnt.c b/drivers/acpi/events/evxfevnt.c
index 887ff9f28a0d..c1b898928256 100644
--- a/drivers/acpi/events/evxfevnt.c
+++ b/drivers/acpi/events/evxfevnt.c
@@ -626,6 +626,13 @@ acpi_install_gpe_block(acpi_handle gpe_device,
                 goto unlock_and_exit;
         }
 
+        /* Run the _PRW methods and enable the GPEs */
+
+        status = acpi_ev_initialize_gpe_block(node, gpe_block);
+        if (ACPI_FAILURE(status)) {
+                goto unlock_and_exit;
+        }
+
         /* Get the device_object attached to the node */
 
         obj_desc = acpi_ns_get_attached_object(node);