Fix eraseblock walking and add a few more checks to make sure such bugs
get caught in the future. I found this bug during a code review.

Signed-off-by: Carl-Daniel Hailfinger <[email protected]>

Index: flashrom-blockerase_walk_fix/flashrom.c
===================================================================
--- flashrom-blockerase_walk_fix/flashrom.c     (Revision 769)
+++ flashrom-blockerase_walk_fix/flashrom.c     (Arbeitskopie)
@@ -563,10 +563,11 @@
 int erase_flash(struct flashchip *flash)
 {
        int i, j, k, ret = 0, found = 0;
+       unsigned int start, len;
 
        printf("Erasing flash chip... ");
        for (k = 0; k < NUM_ERASEFUNCTIONS; k++) {
-               unsigned long done = 0;
+               unsigned int done = 0;
                struct block_eraser eraser = flash->block_erasers[k];
 
                printf_debug("Looking at blockwise erase function %i... ", k);
@@ -594,13 +595,23 @@
                         * members so the loop below won't be executed for them.
                         */
                        for (j = 0; j < eraser.eraseblocks[i].count; j++) {
-                               ret = eraser.block_erase(flash, done + 
eraser.eraseblocks[i].size * j, eraser.eraseblocks[i].size);
+                               start = done + eraser.eraseblocks[i].size * j;
+                               len = eraser.eraseblocks[i].size;
+                               printf_debug("0x%06x-0x%06x, ", start, len);
+                               ret = eraser.block_erase(flash, start, len);
                                if (ret)
                                        break;
                        }
                        if (ret)
                                break;
+                       done += eraser.eraseblocks[i].count *
+                               eraser.eraseblocks[i].size;
                }
+               printf_debug("\n");
+               if (done != flash->total_size * 1024)
+                       fprintf(stderr, "ERROR: Erase region walking erased "
+                               "0x%06x bytes total, expected 0x%06x bytes.",
+                               done, flash->total_size * 1024);
                /* If everything is OK, don't try another erase function. */
                if (!ret)
                        break;


-- 
Developer quote of the month: 
"We are juggling too many chainsaws and flaming arrows and tigers."


_______________________________________________
flashrom mailing list
[email protected]
http://www.flashrom.org/mailman/listinfo/flashrom

Reply via email to