From f7ab95ad975933059c34a6af589812d7962cf6a6 Mon Sep 17 00:00:00 2001
From: Benjamin Valentin <benjamin.valentin@ml-pa.com>
Date: Tue, 7 Jun 2022 00:44:04 +0200
Subject: [PATCH] dirvers/mtd: return early if init fails

If init fails (e.g. because an SD card was not inserted) don't
fail the `mtd->write_size != 0` assertion but instead return early.
---
 drivers/mtd/mtd.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mtd/mtd.c b/drivers/mtd/mtd.c
index 8d0d599d5a..4ce31bd667 100644
--- a/drivers/mtd/mtd.c
+++ b/drivers/mtd/mtd.c
@@ -38,6 +38,9 @@ int mtd_init(mtd_dev_t *mtd)
 
     if (mtd->driver->init) {
         res = mtd->driver->init(mtd);
+        if (res < 0) {
+            return res;
+        }
     }
 
     /* Drivers preceding the introduction of write_size need to set it. While