diff -urN linux-2.6.21.1.old/fs/jffs2/build.c linux-2.6.21.1.dev/fs/jffs2/build.c --- linux-2.6.21.1.old/fs/jffs2/build.c 2007-04-27 23:49:26.000000000 +0200 +++ linux-2.6.21.1.dev/fs/jffs2/build.c 2007-05-26 20:52:04.425726968 +0200 @@ -105,6 +105,17 @@ dbg_fsbuild("scanned flash completely\n"); jffs2_dbg_dump_block_lists_nolock(c); + if (c->flags & (1 << 7)) { + printk("%s(): unlocking the mtd device... ", __func__); + if (c->mtd->unlock) + c->mtd->unlock(c->mtd, 0, c->mtd->size); + printk("done.\n"); + + printk("%s(): erasing all blocks after the end marker... ", __func__); + jffs2_erase_pending_blocks(c, -1); + printk("done.\n"); + } + dbg_fsbuild("pass 1 starting\n"); c->flags |= JFFS2_SB_FLAG_BUILDING; /* Now scan the directory tree, increasing nlink according to every dirent found. */ diff -urN linux-2.6.21.1.old/fs/jffs2/scan.c linux-2.6.21.1.dev/fs/jffs2/scan.c --- linux-2.6.21.1.old/fs/jffs2/scan.c 2007-04-27 23:49:26.000000000 +0200 +++ linux-2.6.21.1.dev/fs/jffs2/scan.c 2007-05-26 20:52:04.491716936 +0200 @@ -142,9 +142,12 @@ /* reset summary info for next eraseblock scan */ jffs2_sum_reset_collected(s); - - ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset), - buf_size, s); + + if (c->flags & (1 << 7)) + ret = BLK_STATE_ALLFF; + else + ret = jffs2_scan_eraseblock(c, jeb, buf_size?flashbuf:(flashbuf+jeb->offset), + buf_size, s); if (ret < 0) goto out; @@ -545,6 +548,17 @@ return err; } + if ((buf[0] == 0xde) && + (buf[1] == 0xad) && + (buf[2] == 0xc0) && + (buf[3] == 0xde)) { + /* end of filesystem. erase everything after this point */ + printk("%s(): End of filesystem marker found at 0x%x\n", __func__, jeb->offset); + c->flags |= (1 << 7); + + return BLK_STATE_ALLFF; + } + /* We temporarily use 'ofs' as a pointer into the buffer/jeb */ ofs = 0;