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From: Jung-uk Kim <jkim@FreeBSD.org>
Date: Wed, 27 Jun 2012 16:15:14 +0000 (UTC)
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Subject: svn commit: r237652 - head/sys/contrib/dev/acpica/components/events
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Author: jkim
Date: Wed Jun 27 16:15:13 2012
New Revision: 237652
URL: http://svn.freebsd.org/changeset/base/237652

Log:
  MFV:	r237650
  
  Do not malloc(9) while holding a spin lock, to avoid panic.
  
  Reported by:	kib (and many others)
  Tested by:	kib (and many others)

Modified:
  head/sys/contrib/dev/acpica/components/events/evxfgpe.c
Directory Properties:
  head/sys/contrib/dev/acpica/   (props changed)

Modified: head/sys/contrib/dev/acpica/components/events/evxfgpe.c
==============================================================================
--- head/sys/contrib/dev/acpica/components/events/evxfgpe.c	Wed Jun 27 16:14:28 2012	(r237651)
+++ head/sys/contrib/dev/acpica/components/events/evxfgpe.c	Wed Jun 27 16:15:13 2012	(r237652)
@@ -298,7 +298,7 @@ AcpiSetupGpeForWake (
     ACPI_STATUS             Status;
     ACPI_GPE_EVENT_INFO     *GpeEventInfo;
     ACPI_NAMESPACE_NODE     *DeviceNode;
-    ACPI_GPE_NOTIFY_INFO    *Notify;
+    ACPI_GPE_NOTIFY_INFO    *NewNotify, *Notify;
     ACPI_CPU_FLAGS          Flags;
 
 
@@ -334,6 +334,12 @@ AcpiSetupGpeForWake (
         return_ACPI_STATUS (AE_BAD_PARAMETER);
     }
 
+    NewNotify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
+    if (!NewNotify)
+    {
+        return_ACPI_STATUS (AE_NO_MEMORY);
+    }
+
     Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
 
     /* Ensure that we have a valid GPE number */
@@ -384,16 +390,10 @@ AcpiSetupGpeForWake (
 
         /* Add this device to the notify list for this GPE */
 
-        Notify = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_NOTIFY_INFO));
-        if (!Notify)
-        {
-            Status = AE_NO_MEMORY;
-            goto UnlockAndExit;
-        }
-
-        Notify->DeviceNode = DeviceNode;
-        Notify->Next = GpeEventInfo->Dispatch.NotifyList;
-        GpeEventInfo->Dispatch.NotifyList = Notify;
+        NewNotify->DeviceNode = DeviceNode;
+        NewNotify->Next = GpeEventInfo->Dispatch.NotifyList;
+        GpeEventInfo->Dispatch.NotifyList = NewNotify;
+        NewNotify = NULL;
     }
 
     /* Mark the GPE as a possible wake event */
@@ -403,6 +403,10 @@ AcpiSetupGpeForWake (
 
 UnlockAndExit:
     AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
+    if (NewNotify)
+    {
+        ACPI_FREE (NewNotify);
+    }
     return_ACPI_STATUS (Status);
 }