disk: Make the disk partition code work with no specific partition types

Currently, if the disk partition code is compiled with all of the parition
types compiled out, it hits an #error which stops the build. This change
adjusts that file so that those functions will fall through to their defaults
in those cases instead of breaking the build. These functions are needed
because other code calls them, and that code is needed because other config
options are overly broad and bring in support we don't need along with
support we do.

Also reduce repetition of the 6-term #ifdef throughout the file.

Signed-off-by: Gabe Black <gabeblack@chromium.org>
Signed-off-by: Simon Glass <sjg@chromium.org>

disk/part.c

@@ -35,12 +35,15 @@
 #define PRINTF(fmt,args...)
 #endif
 
+/* Rather than repeat this expression each time, add a define for it */
 #if (defined(CONFIG_CMD_IDE) || \
      defined(CONFIG_CMD_SATA) || \
      defined(CONFIG_CMD_SCSI) || \
      defined(CONFIG_CMD_USB) || \
      defined(CONFIG_MMC) || \
      defined(CONFIG_SYSTEMACE) )
+#define HAVE_BLOCK_DEVICE
+#endif
 
 struct block_drvr {
 	char *name;
@@ -71,6 +74,7 @@ static const struct block_drvr block_drvr[] = {
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifdef HAVE_BLOCK_DEVICE
 block_dev_desc_t *get_dev(const char *ifname, int dev)
 {
 	const struct block_drvr *drvr = block_drvr;
@@ -104,12 +108,7 @@ block_dev_desc_t *get_dev(const char *ifname, int dev)
 }
 #endif
 
-#if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_SATA) || \
-     defined(CONFIG_CMD_SCSI) || \
-     defined(CONFIG_CMD_USB) || \
-     defined(CONFIG_MMC) || \
-     defined(CONFIG_SYSTEMACE) )
+#ifdef HAVE_BLOCK_DEVICE
 
 /* ------------------------------------------------------------------------- */
 /*
@@ -239,18 +238,7 @@ void dev_print (block_dev_desc_t *dev_desc)
 }
 #endif
 
-#if (defined(CONFIG_CMD_IDE) || \
-     defined(CONFIG_CMD_SATA) || \
-     defined(CONFIG_CMD_SCSI) || \
-     defined(CONFIG_CMD_USB) || \
-     defined(CONFIG_MMC)		|| \
-     defined(CONFIG_SYSTEMACE) )
-
-#if defined(CONFIG_MAC_PARTITION) || \
-    defined(CONFIG_DOS_PARTITION) || \
-    defined(CONFIG_ISO_PARTITION) || \
-    defined(CONFIG_AMIGA_PARTITION) || \
-    defined(CONFIG_EFI_PARTITION)
+#ifdef HAVE_BLOCK_DEVICE
 
 void init_part (block_dev_desc_t * dev_desc)
 {
@@ -293,6 +281,12 @@ void init_part (block_dev_desc_t * dev_desc)
 }
 
 
+#if defined(CONFIG_MAC_PARTITION) || \
+	defined(CONFIG_DOS_PARTITION) || \
+	defined(CONFIG_ISO_PARTITION) || \
+	defined(CONFIG_AMIGA_PARTITION) || \
+	defined(CONFIG_EFI_PARTITION)
+
 static void print_part_header (const char *type, block_dev_desc_t * dev_desc)
 {
 	puts ("\nPartition Map for ");
@@ -326,6 +320,8 @@ static void print_part_header (const char *type, block_dev_desc_t * dev_desc)
 			dev_desc->dev, type);
 }
 
+#endif /* any CONFIG_..._PARTITION */
+
 void print_part (block_dev_desc_t * dev_desc)
 {
 
@@ -372,24 +368,12 @@ void print_part (block_dev_desc_t * dev_desc)
 	puts ("## Unknown partition table\n");
 }
 
-
-#else	/* neither MAC nor DOS nor ISO nor AMIGA nor EFI partition configured */
-# error neither CONFIG_MAC_PARTITION nor CONFIG_DOS_PARTITION
-# error nor CONFIG_ISO_PARTITION nor CONFIG_AMIGA_PARTITION
-# error nor CONFIG_EFI_PARTITION configured!
-#endif
-
-#endif
+#endif /* HAVE_BLOCK_DEVICE */
 
 int get_partition_info(block_dev_desc_t *dev_desc, int part
 					, disk_partition_t *info)
 {
-#if defined(CONFIG_CMD_IDE) || \
-	defined(CONFIG_CMD_SATA) || \
-	defined(CONFIG_CMD_SCSI) || \
-	defined(CONFIG_CMD_USB) || \
-	defined(CONFIG_MMC) || \
-	defined(CONFIG_SYSTEMACE)
+#ifdef HAVE_BLOCK_DEVICE
 
 #ifdef CONFIG_PARTITION_UUIDS
 	/* The common case is no UUID support */
@@ -444,7 +428,7 @@ int get_partition_info(block_dev_desc_t *dev_desc, int part
 	default:
 		break;
 	}
-#endif
+#endif /* HAVE_BLOCK_DEVICE */
 
 	return -1;
 }