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path: root/drivers/mtd/tests/mtd_subpagetest.c
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Diffstat (limited to 'drivers/mtd/tests/mtd_subpagetest.c')
-rw-r--r--drivers/mtd/tests/mtd_subpagetest.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/drivers/mtd/tests/mtd_subpagetest.c b/drivers/mtd/tests/mtd_subpagetest.c
index 2b51842d08fa..1a05bfac4eee 100644
--- a/drivers/mtd/tests/mtd_subpagetest.c
+++ b/drivers/mtd/tests/mtd_subpagetest.c
@@ -29,7 +29,7 @@
#define PRINT_PREF KERN_INFO "mtd_subpagetest: "
-static int dev;
+static int dev = -EINVAL;
module_param(dev, int, S_IRUGO);
MODULE_PARM_DESC(dev, "MTD device number to use");
@@ -379,6 +379,13 @@ static int __init mtd_subpagetest_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;
+ }
+
printk(PRINT_PREF "MTD device: %d\n", dev);
mtd = get_mtd_device(NULL, dev);