xt-sys/exectos
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Fix page fault when trying to find ACPI table
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This commit is contained in:
Rafal Kupiec 2024-07-09 22:47:26 +02:00
parent 47219585d4
commit 3f10e1b59e
Signed by: belliash
GPG Key ID: 4E829243E0CFE6B4
1 changed files with 8 additions and 3 deletions
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11
xtoskrnl/hl/acpi.c
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@ -385,9 +385,13 @@ XTSTATUS
HlpQueryAcpiCache(IN ULONG Signature, HlpQueryAcpiCache(IN ULONG Signature,
OUT PACPI_DESCRIPTION_HEADER *AcpiTable) OUT PACPI_DESCRIPTION_HEADER *AcpiTable)
{ {
PACPI_DESCRIPTION_HEADER TableHeader;
PACPI_CACHE_LIST AcpiCache; PACPI_CACHE_LIST AcpiCache;
PLIST_ENTRY ListEntry; PLIST_ENTRY ListEntry;
/* Initialize variables */
TableHeader = NULL;
/* Iterate through ACPI tables cache list */ /* Iterate through ACPI tables cache list */
ListEntry = HlpAcpiCacheList.Flink; ListEntry = HlpAcpiCacheList.Flink;
while(ListEntry != &HlpAcpiCacheList) while(ListEntry != &HlpAcpiCacheList)
@ -399,7 +403,7 @@ HlpQueryAcpiCache(IN ULONG Signature,
if(AcpiCache->Header.Signature == Signature) if(AcpiCache->Header.Signature == Signature)
{ {
/* ACPI table found in cache, return it */ /* ACPI table found in cache, return it */
*AcpiTable = &AcpiCache->Header; TableHeader = &AcpiCache->Header;
break; break;
} }
@ -408,13 +412,14 @@ HlpQueryAcpiCache(IN ULONG Signature,
} }
/* Check if the requested ACPI table was found in the cache */ /* Check if the requested ACPI table was found in the cache */
if(*AcpiTable == NULL) if(TableHeader == NULL)
{ {
/* ACPI table not found in cache, return error */ /* ACPI table not found in cache, return error */
return STATUS_NOT_FOUND; return STATUS_NOT_FOUND;
} }
/* Return success */ /* Return table header and status code */
*AcpiTable = TableHeader;
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }