jffs2: Further such events for this erase block will not be printed
[ 17.231225] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00dd0000: 0x0ff0 instead
[ 17.240860] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00dd0004: 0x0ff0 instead
[ 17.250491] jffs2: jffs2_scan_eraseblock(): Magic bitmask 0x1985 not found at 0x00dd0008: 0x0ff0 instead
这种错误一般是 烧写的时候 块没擦除干净导致的, 需要在mkfs.jffs2的时候指定 --pad=rootfs的分区大小, 创建的时候 空的地方会自动补0xff