diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index a24d3461fc78..31d05ab0b2fc 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -396,6 +396,32 @@ void scsi_target_reap(struct scsi_target *starget)
 	return;
 }
 
+/**
+ * sanitize_inquiry_string - remove non-graphical chars from an INQUIRY result string
+ * @s: INQUIRY result string to sanitize
+ * @len: length of the string
+ *
+ * Description:
+ *	The SCSI spec says that INQUIRY vendor, product, and revision
+ *	strings must consist entirely of graphic ASCII characters,
+ *	padded on the right with spaces.  Since not all devices obey
+ *	this rule, we will replace non-graphic or non-ASCII characters
+ *	with spaces.  Exception: a NUL character is interpreted as a
+ *	string terminator, so all the following characters are set to
+ *	spaces.
+ **/
+static void sanitize_inquiry_string(unsigned char *s, int len)
+{
+	int terminated = 0;
+
+	for (; len > 0; (--len, ++s)) {
+		if (*s == 0)
+			terminated = 1;
+		if (terminated || *s < 0x20 || *s > 0x7e)
+			*s = ' ';
+	}
+}
+
 /**
  * scsi_probe_lun - probe a single LUN using a SCSI INQUIRY
  * @sdev:	scsi_device to probe
@@ -410,7 +436,7 @@ void scsi_target_reap(struct scsi_target *starget)
  *     INQUIRY data is in @inq_result; the scsi_level and INQUIRY length
  *     are copied to the scsi_device any flags value is stored in *@bflags.
  **/
-static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
+static int scsi_probe_lun(struct scsi_device *sdev, unsigned char *inq_result,
 			  int result_len, int *bflags)
 {
 	unsigned char scsi_cmd[MAX_COMMAND_SIZE];
@@ -469,7 +495,11 @@ static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
 	}
 
 	if (result == 0) {
-		response_len = (unsigned char) inq_result[4] + 5;
+		sanitize_inquiry_string(&inq_result[8], 8);
+		sanitize_inquiry_string(&inq_result[16], 16);
+		sanitize_inquiry_string(&inq_result[32], 4);
+
+		response_len = inq_result[4] + 5;
 		if (response_len > 255)
 			response_len = first_inquiry_len;	/* sanity */
 
@@ -575,7 +605,8 @@ static int scsi_probe_lun(struct scsi_device *sdev, char *inq_result,
  *     SCSI_SCAN_NO_RESPONSE: could not allocate or setup a scsi_device
  *     SCSI_SCAN_LUN_PRESENT: a new scsi_device was allocated and initialized
  **/
-static int scsi_add_lun(struct scsi_device *sdev, char *inq_result, int *bflags)
+static int scsi_add_lun(struct scsi_device *sdev, unsigned char *inq_result,
+		int *bflags)
 {
 	/*
 	 * XXX do not save the inquiry, since it can change underneath us,