fixup! drivers/mtd_mapper: inherit physical properties

RIOT-OS · May 26, 2022 · ec5da5f · ec5da5f
1 parent a962be8
commit ec5da5f
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/drivers/mtd_mapper/mtd_mapper.c b/drivers/mtd_mapper/mtd_mapper.c
@@ -75,11 +75,19 @@ static int _init(mtd_dev_t *mtd)
     mtd_dev_t *backing_mtd = region->parent->mtd;
 
     /* inherit physical properties */
-    region->mtd.page_size = backing_mtd->page_size;
-    region->mtd.pages_per_sector = backing_mtd->pages_per_sector;
+    if (region->mtd.page_size == 0) {
+        region->mtd.page_size = backing_mtd->page_size;
+    }
+    if (region->mtd.pages_per_sector == 0) {
+        region->mtd.pages_per_sector = backing_mtd->pages_per_sector;
+    }
     region->mtd.write_size = backing_mtd->write_size;
 
     /* Configuration sanity check */
+    assert(backing_mtd->page_size >= region->mtd.page_size);
+    assert(backing_mtd->write_size <= region->mtd.page_size);
+    assert(region->mtd.page_size * region->mtd.pages_per_sector
+        == backing_mtd->page_size * backing_mtd->pages_per_sector);
     assert(backing_mtd->sector_count >= region->mtd.sector_count);
 
     /* offset + region size must not exceed the backing device */