From 452f75fa3cc1ee5229ee7ac6ae7e3a95d705acec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Fabian=20H=C3=BC=C3=9Fler?= <fabian.huessler@ml-pa.com>
Date: Wed, 12 Feb 2025 16:25:31 +0100
Subject: [PATCH] cpu/sam0_common/sam0_sdhc: prevent work_area double
 allocation

---
 cpu/sam0_common/sam0_sdhc/mtd_sdhc.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/cpu/sam0_common/sam0_sdhc/mtd_sdhc.c b/cpu/sam0_common/sam0_sdhc/mtd_sdhc.c
index 591301ca85..61bace3a63 100644
--- a/cpu/sam0_common/sam0_sdhc/mtd_sdhc.c
+++ b/cpu/sam0_common/sam0_sdhc/mtd_sdhc.c
@@ -46,9 +46,11 @@ static int _init(mtd_dev_t *dev)
 
 #if IS_USED(MODULE_MTD_WRITE_PAGE)
     /* TODO: move to MTD layer */
-    dev->work_area = malloc(SD_MMC_BLOCK_SIZE);
-    if (dev->work_area == NULL) {
-        return -ENOMEM;
+    if (!dev->work_area) {
+        dev->work_area = malloc(SD_MMC_BLOCK_SIZE);
+        if (dev->work_area == NULL) {
+            return -ENOMEM;
+        }
     }
     dev->write_size = 1;
 #endif