mtd: tests: don't use mtd0 as a default

[mirror_ubuntu-zesty-kernel.git] / drivers / mtd / tests / mtd_speedtest.c

diff --git a/drivers/mtd/tests/mtd_speedtest.c b/drivers/mtd/tests/mtd_speedtest.c
index 79d53ee622951d19e84dbf619ccbdb5d5929d3d8..493b367bdd35211af2db7273d981398a938dd039 100644 (file)
--- a/drivers/mtd/tests/mtd_speedtest.c
+++ b/drivers/mtd/tests/mtd_speedtest.c
@@ -29,7 +29,7 @@
 
 #define PRINT_PREF KERN_INFO "mtd_speedtest: "
 
-static int dev;
+static int dev = -EINVAL;
 module_param(dev, int, S_IRUGO);
 MODULE_PARM_DESC(dev, "MTD device number to use");
 
@@ -361,6 +361,13 @@ static int __init mtd_speedtest_init(void)
 
        printk(KERN_INFO "\n");
        printk(KERN_INFO "=================================================\n");
+
+       if (dev < 0) {
+               printk(PRINT_PREF "Please specify a valid mtd-device via module paramter\n");
+               printk(KERN_CRIT "CAREFUL: This test wipes all data on the specified MTD device!\n");
+               return -EINVAL;
+       }
+
        if (count)
                printk(PRINT_PREF "MTD device: %d    count: %d\n", dev, count);
        else