3 files changed, 16 insertions, 6 deletions
diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c
index 432444af7ee4..a1d3ddba99cc 100644
--- a/drivers/s390/block/dasd.c
+++ b/drivers/s390/block/dasd.c
@@ -24,6 +24,7 @@
 #include <linux/mutex.h>
 #include <linux/debugfs.h>
 #include <linux/seq_file.h>
+#include <linux/vmalloc.h>
 
 #include <asm/ccwdev.h>
 #include <asm/ebcdic.h>
@@ -888,11 +889,11 @@ char *dasd_get_user_string(const char __user *user_buf, size_t user_len)
 {
 	char *buffer;
 
-	buffer = kmalloc(user_len + 1, GFP_KERNEL);
+	buffer = vmalloc(user_len + 1);
 	if (buffer == NULL)
 		return ERR_PTR(-ENOMEM);
 	if (copy_from_user(buffer, user_buf, user_len) != 0) {
-		kfree(buffer);
+		vfree(buffer);
 		return ERR_PTR(-EFAULT);
 	}
 	/* got the string, now strip linefeed. */
@@ -930,7 +931,7 @@ static ssize_t dasd_stats_write(struct file *file,
 		dasd_profile_off(prof);
 	} else
 		rc = -EINVAL;
-	kfree(buffer);
+	vfree(buffer);
 	return rc;
 }
 
@@ -1042,7 +1043,7 @@ static ssize_t dasd_stats_global_write(struct file *file,
 		dasd_global_profile_level = DASD_PROFILE_OFF;
 	} else
 		rc = -EINVAL;
-	kfree(buffer);
+	vfree(buffer);
 	return rc;
 }
 
diff --git a/drivers/s390/block/dasd_eckd.c b/drivers/s390/block/dasd_eckd.c
index 30fb979d684d..6e835c9fdfcb 100644
--- a/drivers/s390/block/dasd_eckd.c
+++ b/drivers/s390/block/dasd_eckd.c
@@ -1461,6 +1461,15 @@ dasd_eckd_check_characteristics(struct dasd_device *device)
 				"Read device characteristic failed, rc=%d", rc);
 		goto out_err3;
 	}
+
+	if ((device->features & DASD_FEATURE_USERAW) &&
+	    !(private->rdc_data.facilities.RT_in_LR)) {
+		dev_err(&device->cdev->dev, "The storage server does not "
+			"support raw-track access\n");
+		rc = -EINVAL;
+		goto out_err3;
+	}
+
 	/* find the valid cylinder size */
 	if (private->rdc_data.no_cyl == LV_COMPAT_CYL &&
 	    private->rdc_data.long_no_cyl)
diff --git a/drivers/s390/block/dasd_proc.c b/drivers/s390/block/dasd_proc.c
index 6c3c5364d082..e12989fff4ff 100644
--- a/drivers/s390/block/dasd_proc.c
+++ b/drivers/s390/block/dasd_proc.c
@@ -312,14 +312,14 @@ static ssize_t dasd_stats_proc_write(struct file *file,
 		pr_info("The statistics have been reset\n");
 	} else
 		goto out_parse_error;
-	kfree(buffer);
+	vfree(buffer);
 	return user_len;
 out_parse_error:
 	rc = -EINVAL;
 	pr_warning("%s is not a supported value for /proc/dasd/statistics\n",
 		str);
 out_error:
-	kfree(buffer);
+	vfree(buffer);
 	return rc;
 #else
 	pr_warning("/proc/dasd/statistics: is not activated in this kernel\n");