Merge branch 'stable/broadcom.ibft' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6.git] / drivers / firmware / iscsi_ibft_find.c
index 82a7a15..f032e44 100644 (file)
 struct acpi_table_ibft *ibft_addr;
 EXPORT_SYMBOL_GPL(ibft_addr);
 
-#define IBFT_SIGN "iBFT"
+static const struct {
+       char *sign;
+} ibft_signs[] = {
+#ifdef CONFIG_ACPI
+       /*
+        * One spec says "IBFT", the other says "iBFT". We have to check
+        * for both.
+        */
+       { ACPI_SIG_IBFT },
+#endif
+       { "iBFT" },
+       { "BIFT" },     /* Broadcom iSCSI Offload */
+};
+
 #define IBFT_SIGN_LEN 4
 #define IBFT_START 0x80000 /* 512kB */
 #define IBFT_END 0x100000 /* 1MB */
@@ -62,6 +75,7 @@ static int __init find_ibft_in_mem(void)
        unsigned long pos;
        unsigned int len = 0;
        void *virt;
+       int i;
 
        for (pos = IBFT_START; pos < IBFT_END; pos += 16) {
                /* The table can't be inside the VGA BIOS reserved space,
@@ -69,18 +83,23 @@ static int __init find_ibft_in_mem(void)
                if (pos == VGA_MEM)
                        pos += VGA_SIZE;
                virt = isa_bus_to_virt(pos);
-               if (memcmp(virt, IBFT_SIGN, IBFT_SIGN_LEN) == 0) {
-                       unsigned long *addr =
-                           (unsigned long *)isa_bus_to_virt(pos + 4);
-                       len = *addr;
-                       /* if the length of the table extends past 1M,
-                        * the table cannot be valid. */
-                       if (pos + len <= (IBFT_END-1)) {
-                               ibft_addr = (struct acpi_table_ibft *)virt;
-                               break;
+
+               for (i = 0; i < ARRAY_SIZE(ibft_signs); i++) {
+                       if (memcmp(virt, ibft_signs[i].sign, IBFT_SIGN_LEN) ==
+                           0) {
+                               unsigned long *addr =
+                                   (unsigned long *)isa_bus_to_virt(pos + 4);
+                               len = *addr;
+                               /* if the length of the table extends past 1M,
+                                * the table cannot be valid. */
+                               if (pos + len <= (IBFT_END-1)) {
+                                       ibft_addr = (struct acpi_table_ibft *)virt;
+                                       goto done;
+                               }
                        }
                }
        }
+done:
        return len;
 }
 /*
@@ -89,18 +108,12 @@ static int __init find_ibft_in_mem(void)
  */
 unsigned long __init find_ibft_region(unsigned long *sizep)
 {
-
+       int i;
        ibft_addr = NULL;
 
 #ifdef CONFIG_ACPI
-       /*
-        * One spec says "IBFT", the other says "iBFT". We have to check
-        * for both.
-        */
-       if (!ibft_addr)
-               acpi_table_parse(ACPI_SIG_IBFT, acpi_find_ibft);
-       if (!ibft_addr)
-               acpi_table_parse("iBFT", acpi_find_ibft);
+       for (i = 0; i < ARRAY_SIZE(ibft_signs) && !ibft_addr; i++)
+               acpi_table_parse(ibft_signs[i].sign, acpi_find_ibft);
 #endif /* CONFIG_ACPI */
 
        /* iBFT 1.03 section 1.4.3.1 mandates that UEFI machines will