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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/media/usb/uvc/uvc_debugfs.c
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@@ -1,14 +1,9 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  *      uvc_debugfs.c --  USB Video Class driver - Debugging support
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  *
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  *      Copyright (C) 2011
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  *          Laurent Pinchart (laurent.pinchart@ideasonboard.com)
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- *
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- *      This program is free software; you can redistribute it and/or modify
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- *      it under the terms of the GNU General Public License as published by
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- *      the Free Software Foundation; either version 2 of the License, or
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- *      (at your option) any later version.
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- *
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  */
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8
 
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 #include <linux/module.h>
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@@ -78,56 +73,33 @@
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 void uvc_debugfs_init_stream(struct uvc_streaming *stream)
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 {
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 	struct usb_device *udev = stream->dev->udev;
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-	struct dentry *dent;
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-	char dir_name[32];
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+	char dir_name[33];
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 	if (uvc_debugfs_root_dir == NULL)
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 		return;
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-	sprintf(dir_name, "%u-%u", udev->bus->busnum, udev->devnum);
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+	snprintf(dir_name, sizeof(dir_name), "%u-%u-%u", udev->bus->busnum,
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+		 udev->devnum, stream->intfnum);
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-	dent = debugfs_create_dir(dir_name, uvc_debugfs_root_dir);
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-	if (IS_ERR_OR_NULL(dent)) {
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-		uvc_printk(KERN_INFO, "Unable to create debugfs %s "
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-			   "directory.\n", dir_name);
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-		return;
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-	}
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+	stream->debugfs_dir = debugfs_create_dir(dir_name,
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+						 uvc_debugfs_root_dir);
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-	stream->debugfs_dir = dent;
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-
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-	dent = debugfs_create_file("stats", 0444, stream->debugfs_dir,
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-				   stream, &uvc_debugfs_stats_fops);
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-	if (IS_ERR_OR_NULL(dent)) {
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-		uvc_printk(KERN_INFO, "Unable to create debugfs stats file.\n");
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-		uvc_debugfs_cleanup_stream(stream);
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-		return;
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-	}
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+	debugfs_create_file("stats", 0444, stream->debugfs_dir, stream,
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+			    &uvc_debugfs_stats_fops);
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 }
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 void uvc_debugfs_cleanup_stream(struct uvc_streaming *stream)
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 {
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-	if (stream->debugfs_dir == NULL)
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-		return;
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-
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 	debugfs_remove_recursive(stream->debugfs_dir);
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 	stream->debugfs_dir = NULL;
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 }
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 void uvc_debugfs_init(void)
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 {
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-	struct dentry *dir;
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-
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-	dir = debugfs_create_dir("uvcvideo", usb_debug_root);
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-	if (IS_ERR_OR_NULL(dir)) {
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-		uvc_printk(KERN_INFO, "Unable to create debugfs directory\n");
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-		return;
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-	}
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-
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-	uvc_debugfs_root_dir = dir;
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+	uvc_debugfs_root_dir = debugfs_create_dir("uvcvideo", usb_debug_root);
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 }
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 void uvc_debugfs_cleanup(void)
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 {
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-	if (uvc_debugfs_root_dir != NULL)
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-		debugfs_remove_recursive(uvc_debugfs_root_dir);
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+	debugfs_remove_recursive(uvc_debugfs_root_dir);
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 }