When the DT property no-unaligned-direct-access is set, map->phys is set
to NO_XIP. With this property set, the flash should not be exposed
directly to MTD users, since it cannot be mapped.
map_ram() exposes the flash direct access unconditionally which leads to
access errors (when the bus width does not match the RAM width).
Therefore do not set point and unpoint when NO_XIP is set.
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@linutronix.de>
Reviewed-by: Benedikt Spranger <b.spranger@linutronix.de>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230919113320.16953-1-shivamurthy.shastri@linutronix.de
mtd->_read = mapram_read;
mtd->_write = mapram_write;
mtd->_panic_write = mapram_write;
- mtd->_point = mapram_point;
mtd->_sync = mapram_nop;
- mtd->_unpoint = mapram_unpoint;
mtd->flags = MTD_CAP_RAM;
mtd->writesize = 1;
+ /* Disable direct access when NO_XIP is set */
+ if (map->phys != NO_XIP) {
+ mtd->_point = mapram_point;
+ mtd->_unpoint = mapram_unpoint;
+ }
+
mtd->erasesize = PAGE_SIZE;
while(mtd->size & (mtd->erasesize - 1))
mtd->erasesize >>= 1;