Retry correct range in write_page_write_jedec()

The automatic retry in write_page_write_jedec didn't retry flashing the
correct range, essentially rendering the functionality useless.

This patch simplifies the code and fixes the bug.

Thanks to Luke Dashjr for testing.

Mark Winbond W29C040P as supported.

Corresponding to flashrom svn r757.
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Luke Dashjr <luke_coreboot@dashjr.org>

flashchips.c

@@ -3060,7 +3060,7 @@ struct flashchip flashchips[] = {
 		.model_id	= W_29C040P,
 		.total_size	= 512,
 		.page_size	= 256,
-		.tested		= TEST_UNTESTED,
+		.tested		= TEST_OK_PREW,
 		.probe		= probe_jedec,
 		.probe_timing	= 10, 
 		.erase		= erase_chip_jedec,

jedec.c

@@ -262,7 +262,7 @@ int erase_chip_jedec(struct flashchip *flash)
 int write_page_write_jedec(struct flashchip *flash, uint8_t *src,
 			   int start, int page_size)
 {
-	int i, tried = 0, start_index = 0, ok;
+	int i, tried = 0, ok;
 	uint8_t *s = src;
 	chipaddr bios = flash->virtual_memory;
 	chipaddr dst = bios + start;
@@ -275,7 +275,7 @@ retry:
 	chip_writeb(0xA0, bios + 0x5555);
 
 	/* transfer data from source to destination */
-	for (i = start_index; i < page_size; i++) {
+	for (i = 0; i < page_size; i++) {
 		/* If the data is 0xFF, don't program it */
 		if (*src != 0xFF)
 			chip_writeb(*src, dst);
@@ -290,7 +290,7 @@ retry:
 	ok = !verify_range(flash, src, start, page_size, NULL);
 
 	if (!ok && tried++ < MAX_REFLASH_TRIES) {
-		start_index = i;
+		fprintf(stderr, "retrying.\n");
 		goto retry;
 	}
 	if (!ok) {