diff -Naur linux-3.14.43.org/drivers/ata/libata-core.c linux-3.14.43/drivers/ata/libata-core.c
--- linux-3.14.43.org/drivers/ata/libata-core.c	2015-05-17 18:54:01.000000000 +0200
+++ linux-3.14.43/drivers/ata/libata-core.c	2015-07-11 19:15:01.450041507 +0200
@@ -4229,6 +4229,9 @@
 	{ "Micron_M550*",		NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },
 	{ "Crucial_CT*M550SSD*",	NULL,	ATA_HORKAGE_NO_NCQ_TRIM, },
 
+	/* devices that don't properly handle TRIM commands */
+	{ "SuperSSpeed S238*",		NULL,	ATA_HORKAGE_NOTRIM, },
+
 	/*
 	 * Some WD SATA-I drives spin up and down erratically when the link
 	 * is put into the slumber mode.  We don't have full list of the
diff -Naur linux-3.14.43.org/drivers/ata/libata-scsi.c linux-3.14.43/drivers/ata/libata-scsi.c
--- linux-3.14.43.org/drivers/ata/libata-scsi.c	2015-05-17 18:54:01.000000000 +0200
+++ linux-3.14.43/drivers/ata/libata-scsi.c	2015-07-11 20:47:22.570021716 +0200
@@ -2510,11 +2513,15 @@
 		rbuf[14] = (lowest_aligned >> 8) & 0x3f;
 		rbuf[15] = lowest_aligned;
 
-		if (ata_id_has_trim(args->id)) {
-			rbuf[14] |= 0x80; /* TPE */
 
-			if (ata_id_has_zero_after_trim(args->id))
-				rbuf[14] |= 0x40; /* TPRZ */
+
+		if (!(dev->horkage & ATA_HORKAGE_NOTRIM)) { 
+			if (ata_id_has_trim(args->id)) {
+				rbuf[14] |= 0x80; /* TPE */
+
+				if (ata_id_has_zero_after_trim(args->id))
+					rbuf[14] |= 0x40; /* TPRZ */
+			}
 		}
 	}
 
diff -Naur linux-3.14.43.org/include/linux/libata.h linux-3.14.43/include/linux/libata.h
--- linux-3.14.43.org/include/linux/libata.h	2015-05-17 18:54:01.000000000 +0200
+++ linux-3.14.43/include/linux/libata.h	2015-07-11 19:13:03.190682173 +0200
@@ -421,6 +421,7 @@
 	ATA_HORKAGE_NO_NCQ_TRIM	= (1 << 19),	/* don't use queued TRIM */
 	ATA_HORKAGE_NOLPM	= (1 << 20),	/* don't use LPM */
 	ATA_HORKAGE_WD_BROKEN_LPM = (1 << 21),	/* some WDs have broken LPM */
+	ATA_HORKAGE_NOTRIM	= (1 << 22),	/* don't use TRIM */
 
 	 /* DMA mask for user DMA control: User visible values; DO NOT
 	    renumber */