mtd: char: Drop mtd_mutex usage from mtdchar_open()

It looks unnecessary in the function, remove it from the function
having in mind to remove it completely.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20210217211845.43364-1-alexander.sverdlin@nokia.com

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index 323035d..f31390d 100644 (file)
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -58,13 +58,10 @@ static int mtdchar_open(struct inode *inode, struct file *file)
        if ((file->f_mode & FMODE_WRITE) && (minor & 1))
                return -EACCES;
 
-       mutex_lock(&mtd_mutex);
        mtd = get_mtd_device(NULL, devnum);
 
-       if (IS_ERR(mtd)) {
-               ret = PTR_ERR(mtd);
-               goto out;
-       }
+       if (IS_ERR(mtd))
+               return PTR_ERR(mtd);
 
        if (mtd->type == MTD_ABSENT) {
                ret = -ENODEV;
@@ -84,13 +81,10 @@ static int mtdchar_open(struct inode *inode, struct file *file)
        }
        mfi->mtd = mtd;
        file->private_data = mfi;
-       mutex_unlock(&mtd_mutex);
        return 0;
 
 out1:
        put_mtd_device(mtd);
-out:
-       mutex_unlock(&mtd_mutex);
        return ret;
 } /* mtdchar_open */