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path: root/drivers/firmware/iscsi_ibft_find.c
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Diffstat (limited to 'drivers/firmware/iscsi_ibft_find.c')
-rw-r--r--drivers/firmware/iscsi_ibft_find.c31
1 files changed, 19 insertions, 12 deletions
diff --git a/drivers/firmware/iscsi_ibft_find.c b/drivers/firmware/iscsi_ibft_find.c
index dd85555d3296..82a7a1566290 100644
--- a/drivers/firmware/iscsi_ibft_find.c
+++ b/drivers/firmware/iscsi_ibft_find.c
@@ -57,23 +57,12 @@ static int __init acpi_find_ibft(struct acpi_table_header *header)
}
#endif /* CONFIG_ACPI */
-/*
- * Routine used to find the iSCSI Boot Format Table. The logical
- * kernel address is set in the ibft_addr global variable.
- */
-unsigned long __init find_ibft_region(unsigned long *sizep)
+static int __init find_ibft_in_mem(void)
{
unsigned long pos;
unsigned int len = 0;
void *virt;
- ibft_addr = NULL;
-
- /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will
- * only use ACPI for this */
- if (efi_enabled)
- return 0;
-
for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
/* The table can't be inside the VGA BIOS reserved space,
* so skip that area */
@@ -92,6 +81,17 @@ unsigned long __init find_ibft_region(unsigned long *sizep)
}
}
}
+ return len;
+}
+/*
+ * Routine used to find the iSCSI Boot Format Table. The logical
+ * kernel address is set in the ibft_addr global variable.
+ */
+unsigned long __init find_ibft_region(unsigned long *sizep)
+{
+
+ ibft_addr = NULL;
+
#ifdef CONFIG_ACPI
/*
* One spec says "IBFT", the other says "iBFT". We have to check
@@ -102,6 +102,13 @@ unsigned long __init find_ibft_region(unsigned long *sizep)
if (!ibft_addr)
acpi_table_parse("iBFT", acpi_find_ibft);
#endif /* CONFIG_ACPI */
+
+ /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will
+ * only use ACPI for this */
+
+ if (!ibft_addr && !efi_enabled)
+ find_ibft_in_mem();
+
if (ibft_addr) {
*sizep = PAGE_ALIGN(ibft_addr->header.length);
return (u64)isa_virt_to_bus(ibft_addr);