Make the vendor name optional in the -m flashrom parameter when there's only one board name that matches

The full syntax still works, and is required when two vendors have
boards with the same names.

Corresponding to flashrom svn r190 and coreboot v2 svn r3082.

Signed-off-by: Peter Stuge <peter@stuge.se>
Acked-by: Stefan Reinauer <stepan@coresystems.de>

README

@@ -23,7 +23,7 @@ Usage
 -----
 
  $ flashrom [-rwvEVfh] [-c chipname] [-s exclude_start] [-e exclude_end]
-            [-m vendor:part] [-l file.layout] [-i imagename] [file]
+            [-m [vendor:]part] [-l file.layout] [-i imagename] [file]
    -r | --read:                      read flash and save into file
    -w | --write:                     write file into flash (default when
                                      file is specified)
@@ -33,7 +33,7 @@ Usage
    -c | --chip <chipname>:           probe only for specified flash chip
    -s | --estart <addr>:             exclude start position
    -e | --eend <addr>:               exclude end postion
-   -m | --mainboard <vendor:part>: override mainboard settings
+   -m | --mainboard <[vendor:]part>: override mainboard settings
    -f | --force:                     force write without checking image
    -l | --layout <file.layout>:      read rom layout from file
    -i | --image <name>:              only flash image name from flash layout

board_enable.c

@@ -413,9 +413,10 @@ struct board_pciid_enable board_pciid_enables[] = {
 static struct board_pciid_enable *board_match_coreboot_name(const char *vendor, const char *part)
 {
 	struct board_pciid_enable *board = board_pciid_enables;
+	struct board_pciid_enable *partmatch = NULL;
 
 	for (; board->name; board++) {
-		if (!board->lb_vendor || strcmp(board->lb_vendor, vendor))
+		if (vendor && (!board->lb_vendor || strcmp(board->lb_vendor, vendor)))
 			continue;
 
 		if (!board->lb_part || strcmp(board->lb_part, part))
@@ -427,8 +428,23 @@ static struct board_pciid_enable *board_match_coreboot_name(const char *vendor,
 		if (board->second_vendor &&
 			!pci_dev_find(board->second_vendor, board->second_device))
 			continue;
+
+		if (vendor)
 			return board;
+
+		if (partmatch) {
+			/* a second entry has a matching part name */
+			printf("AMBIGUOUS BOARD NAME: %s\n", part);
+			printf("At least vendors '%s' and '%s' match.\n",
+				partmatch->lb_vendor, board->lb_vendor);
+			printf("Please use the full -m vendor:part syntax.\n");
+			return NULL;
 		}
+		partmatch = board;
+	}
+
+	if (partmatch)
+		return partmatch;
 
 	printf("NOT FOUND %s:%s\n", vendor, part);
 
@@ -477,7 +493,7 @@ int board_flash_enable(const char *vendor, const char *part)
 	struct board_pciid_enable *board = NULL;
 	int ret = 0;
 
-	if (vendor && part)
+	if (part)
 		board = board_match_coreboot_name(vendor, part);
 
 	if (!board)

flashrom.8

@@ -40,11 +40,11 @@ Exclude start position (obsolete).
 .B "\-e, \-\-eend" <addr> 
 Exclude end postion (obsolete).
 .TP
-.B "\-m, \-\-mainboard" <vendor:part>
+.B "\-m, \-\-mainboard" <[vendor:]part>
 Override mainboard settings. This option is needed for some mainboards,
 see the
 .B flashrom
-README for a list.
+README for a list. The vendor is not required when the board name is unique.
 .TP
 .B "\-f, \-\-force"
 Force write without checking whether the ROM image file is really meant

flashrom.c

@@ -196,7 +196,7 @@ int verify_flash(struct flashchip *flash, uint8_t *buf)
 void usage(const char *name)
 {
 	printf("usage: %s [-rwvEVfhR] [-c chipname] [-s exclude_start]\n", name);
-	printf("       [-e exclude_end] [-m vendor:part] [-l file.layout] [-i imagename] [file]\n");
+	printf("       [-e exclude_end] [-m [vendor:]part] [-l file.layout] [-i imagename] [file]\n");
 	printf
 	    ("   -r | --read:                      read flash and save into file\n"
 	     "   -w | --write:                     write file into flash\n"
@@ -206,7 +206,7 @@ void usage(const char *name)
 	     "   -c | --chip <chipname>:           probe only for specified flash chip\n"
 	     "   -s | --estart <addr>:             exclude start position\n"
 	     "   -e | --eend <addr>:               exclude end postion\n"
-	     "   -m | --mainboard <vendor:part>: override mainboard settings\n"
+	     "   -m | --mainboard <[vendor:]part>: override mainboard settings\n"
 	     "   -f | --force:                     force write without checking image\n"
 	     "   -l | --layout <file.layout>:      read rom layout from file\n"
 	     "   -i | --image <name>:              only flash image name from flash layout\n"
@@ -301,8 +301,8 @@ int main(int argc, char *argv[])
 				lb_vendor = tempstr;
 				lb_part = tempstr2;
 			} else {
-				printf("warning: ignored wrong format of"
-				       " mainboard: %s\n", tempstr);
+				lb_vendor = NULL;
+				lb_part = tempstr;
 			}
 			break;
 		case 'f':