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hc
2024-10-22 8ac6c7a54ed1b98d142dce24b11c6de6a1e239a5 
 kernel/drivers/hid/hid-roccat.c
....@@ -1,3 +1,4 @@
1
+// SPDX-License-Identifier: GPL-2.0-or-later
12 /*
23  * Roccat driver for Linux
34  *
....@@ -5,10 +6,6 @@
56  */
67 
78 /*
8
- * This program is free software; you can redistribute it and/or modify it
9
- * under the terms of the GNU General Public License as published by the Free
10
- * Software Foundation; either version 2 of the License, or (at your option)
11
- * any later version.
129  */
1310 
1411 /*
....@@ -260,6 +257,8 @@
260257 	if (!new_value)
261258 		return -ENOMEM;
262259 
260
+	mutex_lock(&device->cbuf_lock);
261
+
263262 	report = &device->cbuf[device->cbuf_end];
264263 
265264 	/* passing NULL is safe */
....@@ -279,6 +278,8 @@
279278 			reader->cbuf_start = (reader->cbuf_start + 1) % ROCCAT_CBUF_SIZE;
280279 	}
281280 
281
+	mutex_unlock(&device->cbuf_lock);
282
+
282283 	wake_up_interruptible(&device->wait);
283284 	return 0;
284285 }