linux-kernel - [PATCH] mei: expand minor range when registering chrdev region

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Message-Id: <20190212060252.8948-1-cgxu519@gmx.com>
Date:   Tue, 12 Feb 2019 14:02:52 +0800
From:   Chengguang Xu <cgxu519@....com>
To:     tomas.winkler@...el.com, arnd@...db.de, gregkh@...uxfoundation.org
Cc:     linux-kernel@...r.kernel.org, Chengguang Xu <cgxu519@....com>
Subject: [PATCH] mei: expand minor range when registering chrdev region

Actually, total amount of available minor number
for a single major is MINORMARK + 1. So expand
minor range when registering chrdev region.

Signed-off-by: Chengguang Xu <cgxu519@....com>
---
 drivers/misc/mei/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c
index 87281b3695e6..3df54f1e1a8b 100644
--- a/drivers/misc/mei/main.c
+++ b/drivers/misc/mei/main.c
@@ -869,7 +869,7 @@ static const struct file_operations mei_fops = {
 
 static struct class *mei_class;
 static dev_t mei_devt;
-#define MEI_MAX_DEVS  MINORMASK
+#define MEI_MAX_DEVS  (MINORMASK + 1)
 static DEFINE_MUTEX(mei_minor_lock);
 static DEFINE_IDR(mei_idr);
 
-- 
2.20.1