Change in flashrom[master]: flashrom.c: wip check_access write/erase path

[Edward O'Callaghan (Code Review)]

Edward O'Callaghan has uploaded this change for review. ( https://review.coreboot.org/c/flashrom/+/63751 )

Change subject: flashrom.c: wip check_access write/erase path
......................................................................

flashrom.c: wip check_access write/erase path

Change-Id: I15ec3131211548ab91be6866f48c5201c9865aa3
Signed-off-by: Edward O'Callaghan 
---
M flashrom.c
1 file changed, 15 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/51/63751/1

diff --git a/flashrom.c b/flashrom.c
index 9728c65..c032dc5 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -1267,6 +1267,11 @@
    	info->region_start = entry->start;
    	info->region_end   = entry->end;

+		const chipsize_t region_len = entry->end - entry->start + 1;
+		int ret = check_access(flashctx, entry->start, region_len, 1);
+		if (!ret)
+			continue;
+
    	size_t j;
    	int error = 1; /* retry as long as it's 1 */
    	for (j = 0; j < NUM_ERASEFUNCTIONS; ++j) {
@@ -1370,6 +1375,11 @@
    					 erase_len - starthere, &starthere, flashctx->chip->gran))) {
    		if (!writecount++)
    			msg_cdbg("W");
+
+			ret = check_access(flashctx, info->erase_start + starthere, lenhere, 1);
+			if (!ret)
+				continue;
+
    		/* Needs the partial write function signature. */
    		if (flashctx->chip->write(flashctx, backup_contents + starthere,
    					  info->erase_start + starthere, lenhere))
@@ -1474,6 +1484,11 @@
    				 erase_len - starthere, &starthere, flashctx->chip->gran))) {
    	if (!writecount++)
    		msg_cdbg("W");
+
+		ret = check_access(flashctx, info->erase_start + starthere, lenhere, 1);
+		if (!ret)
+			continue;
+
    	/* Needs the partial write function signature. */
    	if (flashctx->chip->write(flashctx, newcontents + starthere,
    				  info->erase_start + starthere, lenhere))