+ ibft-for-uefi-machines-actually-do-scan-acpi-for-ibft.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     ibft: for UEFI machines actually do scan ACPI for iBFT
has been added to the -mm tree.  Its filename is
     ibft-for-uefi-machines-actually-do-scan-acpi-for-ibft.patch

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------------------------------------------------------
Subject: ibft: for UEFI machines actually do scan ACPI for iBFT
From: Konrad Rzeszutek Wilk <konrad@kernel.org>

For machines with IBFT 1.03 do scan the ACPI table for 'iBFT' or for
'IBFT'.  If the machine is in UEFI mode, only do the ACPI table scan.  For
all other machines (pre IBFT 1.03) do a memory scan if not found in the
ACPI tables.

Acked-by: Peter Jones <pjones@redhat.com>
Tested-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: Konrad Rzeszutek Wilk <konrad@kernel.org>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/firmware/iscsi_ibft_find.c |   31 ++++++++++++++++-----------
 1 file changed, 19 insertions(+), 12 deletions(-)

diff -puN drivers/firmware/iscsi_ibft_find.c~ibft-for-uefi-machines-actually-do-scan-acpi-for-ibft drivers/firmware/iscsi_ibft_find.c
--- a/drivers/firmware/iscsi_ibft_find.c~ibft-for-uefi-machines-actually-do-scan-acpi-for-ibft
+++ a/drivers/firmware/iscsi_ibft_find.c
@@ -56,23 +56,12 @@ static int __init acpi_find_ibft(struct 
 }
 #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_mem_scan(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 */
@@ -91,6 +80,17 @@ unsigned long __init find_ibft_region(un
 			}
 		}
 	}
+	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
@@ -101,6 +101,13 @@ unsigned long __init find_ibft_region(un
 	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_mem_scan();
+
 	if (ibft_addr) {
 		*sizep = PAGE_ALIGN(ibft_addr->header.length);
 		return (u64)isa_virt_to_bus(ibft_addr);
_

Patches currently in -mm which might be from konrad@kernel.org are

linux-next.patch
ibft-update-ibft-handling-for-v103-of-the-spec.patch
ibft-for-uefi-machines-actually-do-scan-acpi-for-ibft.patch