Merge pull request #297 from UweBonnes/write_size

target: Fix calculation of erase size.

src/target/target.c

@@ -199,7 +199,8 @@ int target_flash_erase(target *t, target_addr addr, size_t len)
 	int ret = 0;
 	while (len) {
 		struct target_flash *f = flash_for_addr(t, addr);
-		size_t tmplen = MIN(len, f->length - (addr % f->length));
+		size_t tmptarget = MIN(addr + len, f->start + f->length);
+		size_t tmplen = tmptarget - addr;
 		ret |= f->erase(f, addr, tmplen);
 		addr += tmplen;
 		len -= tmplen;