diff --git a/sys/dev/mmc/mmcsd.c b/sys/dev/mmc/mmcsd.c
--- a/sys/dev/mmc/mmcsd.c
+++ b/sys/dev/mmc/mmcsd.c
@@ -232,6 +232,7 @@
 	off_t erase_size, sector_size, size, wp_size;
 	uintmax_t bytes;
 	int err, i;
+	int ignore_part = 0;
 	uint32_t quirks;
 	uint8_t rev;
 	bool comp, ro;
@@ -321,6 +322,10 @@
 		}
 	}
 
+	/* Partitions support might be disabled by user */
+	resource_int_value(device_get_name(dev), device_get_unit(dev),
+	    "ignore_part", &ignore_part);
+
 	/*
 	 * Ignore user-creatable enhanced user data area and general purpose
 	 * partitions partitions as long as partitioning hasn't been finished.
@@ -341,7 +346,7 @@
 	size = ext_csd[EXT_CSD_ENH_SIZE_MULT] +
 	    (ext_csd[EXT_CSD_ENH_SIZE_MULT + 1] << 8) +
 	    (ext_csd[EXT_CSD_ENH_SIZE_MULT + 2] << 16);
-	if (rev >= 4 && comp == TRUE && size > 0 &&
+	if (ignore_part == 0 && rev >= 4 && comp == TRUE && size > 0 &&
 	    (ext_csd[EXT_CSD_PART_SUPPORT] &
 	    EXT_CSD_PART_SUPPORT_ENH_ATTR_EN) != 0 &&
 	    (ext_csd[EXT_CSD_PART_ATTR] & (EXT_CSD_PART_ATTR_ENH_USR)) != 0) {
@@ -367,7 +372,7 @@
 	mmcsd_add_part(sc, EXT_CSD_PART_CONFIG_ACC_DEFAULT, "mmcsd",
 	    device_get_unit(dev), mmc_get_media_size(dev) * sector_size, ro);
 
-	if (mmc_get_spec_vers(dev) < 3)
+	if (mmc_get_spec_vers(dev) < 3 || ignore_part != 0)
 		return (0);
 
 	/* Belatedly announce enhanced user data slice. */