[M] Change in flashrom[master]: jedec.c: Rewrite control flow procedurally

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has submitted this change. ( https://review.coreboot.org/c/flashrom/+/72608 )

(

1 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.
 )Change subject: jedec.c: Rewrite control flow procedurally
......................................................................

jedec.c: Rewrite control flow procedurally

Drop goto usage in fav of loop constructs.

Change-Id: I0927ed40e54cc7e114a57dc40e3614f4825a0ca9
Signed-off-by: Edward O'Callaghan 
Reviewed-on: https://review.coreboot.org/c/flashrom/+/72608
Reviewed-by: Stefan Reinauer 
Tested-by: build bot (Jenkins) 
---
M jedec.c
1 file changed, 47 insertions(+), 34 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Stefan Reinauer: Looks good to me, approved

diff --git a/jedec.c b/jedec.c
index db01c08..7f72e53 100644
--- a/jedec.c
+++ b/jedec.c
@@ -347,30 +347,27 @@
 static int write_byte_program_jedec_common(const struct flashctx *flash, const uint8_t *src,
    				   chipaddr dst, unsigned int mask)
 {
-	int tried = 0, failed = 0;
-	chipaddr bios = flash->virtual_memory;
+	int tries = 0;

/* If the data is 0xFF, don't program it and don't complain. */
    if (*src == 0xFF) {
    	return 0;
    }

-retry:
-	/* Issue JEDEC Byte Program command */
-	start_program_jedec_common(flash, mask);
+	for (; tries < MAX_REFLASH_TRIES; tries++) {
+		const chipaddr bios = flash->virtual_memory;
+		/* Issue JEDEC Byte Program command */
+		start_program_jedec_common(flash, mask);

-	/* transfer data from source to destination */
-	chip_writeb(flash, *src, dst);
-	toggle_ready_jedec(flash, bios);
+		/* transfer data from source to destination */
+		chip_writeb(flash, *src, dst);
+		toggle_ready_jedec(flash, bios);

-	if (chip_readb(flash, dst) != *src && tried++ < MAX_REFLASH_TRIES) {
-		goto retry;
+		if (chip_readb(flash, dst) == *src)
+			break;
    }

-	if (tried >= MAX_REFLASH_TRIES)
-		failed = 1;
-
-	return failed;
+	return (tries >= MAX_REFLASH_TRIES) ? 1 : 0;
 }

/* chunksize is 1 */
@@ -399,40 +396,41 @@
 static int write_page_write_jedec_common(struct flashctx *flash, const uint8_t *src,
    				 unsigned int start, unsigned int page_size)
 {
-	unsigned int i;
-	int tried = 0, failed;
+	int tries = 0, failed;
    const uint8_t *s = src;
-	chipaddr bios = flash->virtual_memory;
+	const chipaddr bios = flash->virtual_memory;
    chipaddr dst = bios + start;
    chipaddr d = dst;
    const unsigned int mask = getaddrmask(flash->chip);

-retry:
-	/* Issue JEDEC Start Program command */
-	start_program_jedec_common(flash, mask);
+	for (; tries < MAX_REFLASH_TRIES; tries++) {
+		/* Issue JEDEC Start Program command */
+		start_program_jedec_common(flash, mask);

-	/* transfer data from source to destination */
-	for (i = 0; i < page_size; i++) {
-		/* If the data is 0xFF, don't program it */
-		if (*src != 0xFF)
-			chip_writeb(flash, *src, dst);
-		dst++;
-		src++;
-	}
+		/* transfer data from source to destination */
+		for (unsigned int i = 0; i < page_size; i++) {
+			/* If the data is 0xFF, don't program it */
+			if (*src != 0xFF)
+				chip_writeb(flash, *src, dst);
+			dst++;
+			src++;
+		}

-	toggle_ready_jedec(flash, dst - 1);
+		toggle_ready_jedec(flash, dst - 1);

-	dst = d;
-	src = s;
-	failed = verify_range(flash, src, start, page_size);
+		dst = d;
+		src = s;
+		failed = verify_range(flash, src, start, page_size);
+		if (!failed)
+			break;

-	if (failed && tried++ < MAX_REFLASH_TRIES) {
    	msg_cerr("retrying.\n");
-		goto retry;
    }
+
    if (failed) {
    	msg_cerr(" page 0x%" PRIxPTR " failed!\n", (d - bios) / page_size);
    }
+
    return failed;
 }