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Map B_PAGE_SIZE, and not just acpi_description_header (was actually a

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regression), since the tables are bigger than that.
Accessing unmapped memory was doing bad things on
XenServer.
Fixes ticket #7497.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42068 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Stefano Ceccherini 2011-06-09 14:52:56 +00:00
parent 5cea82988c
commit e282383b4e
1 changed files with 2 additions and 2 deletions
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4
src/system/boot/platform/bios_ia32/acpi.cpp
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@ -85,7 +85,7 @@ acpi_find_table(const char* signature)
for (int32 j = 0; j < sNumEntries; j++, pointer++) {
acpi_descriptor_header* header = (acpi_descriptor_header*)
mmu_map_physical_memory(*pointer,
sizeof(acpi_descriptor_header), kDefaultPageFlags);
B_PAGE_SIZE, kDefaultPageFlags);
if (header == NULL
|| strncmp(header->signature, signature, 4) != 0) {
// not interesting for us
@ -93,7 +93,7 @@ acpi_find_table(const char* signature)
signature, header != NULL ? header->signature : "null"));
if (header != NULL)
mmu_free(header, sizeof(acpi_descriptor_header));
mmu_free(header, B_PAGE_SIZE);
continue;
}