mmc: mmc_test: replace strict_strtol() with kstrtol_from_user()

The usage of strict_strtol() is not preferred, because
strict_strtol() is obsolete. Thus, kstrtol() should be used.

Also, both kstrtol() and copy_from_user() can be replaced
with kstrtol_from_user() to make the code simpler.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Chris Ball <cjb@laptop.org>

1 files changed, 4 insertions, 10 deletions

diff --git a/drivers/mmc/card/mmc_test.c b/drivers/mmc/card/mmc_test.c
index a69df5216274..0c0fc52d42c5 100644
--- a/drivers/mmc/card/mmc_test.c
+++ b/drivers/mmc/card/mmc_test.c
@@ -2849,18 +2849,12 @@ static ssize_t mtf_test_write(struct file *file, const char __user *buf,
         struct seq_file *sf = (struct seq_file *)file->private_data;
         struct mmc_card *card = (struct mmc_card *)sf->private;
         struct mmc_test_card *test;
-        char lbuf[12];
         long testcase;
+        int ret;
 
-        if (count >= sizeof(lbuf))
-                return -EINVAL;
-
-        if (copy_from_user(lbuf, buf, count))
-                return -EFAULT;
-        lbuf[count] = '\0';
-
-        if (strict_strtol(lbuf, 10, &testcase))
-                return -EINVAL;
+        ret = kstrtol_from_user(buf, count, 10, &testcase);
+        if (ret)
+                return ret;
 
         test = kzalloc(sizeof(struct mmc_test_card), GFP_KERNEL);
         if (!test)