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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/soc/ti/knav_qmss_queue.c
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@@ -1,3 +1,4 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Keystone Queue Manager subsystem driver
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  *
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@@ -5,15 +6,6 @@
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  * Authors:	Sandeep Nair <sandeep_n@ti.com>
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  *		Cyril Chemparathy <cyril@ti.com>
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  *		Santosh Shilimkar <santosh.shilimkar@ti.com>
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * version 2 as published by the Free Software Foundation.
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- *
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- * This program is distributed in the hope that it will be useful, but
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- * WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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- * General Public License for more details.
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  */
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10
 
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 #include <linux/debugfs.h>
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@@ -33,6 +25,8 @@
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 static struct knav_device *kdev;
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 static DEFINE_MUTEX(knav_dev_lock);
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+#define knav_dev_lock_held() \
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+	lockdep_is_held(&knav_dev_lock)
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 /* Queue manager register indices in DTS */
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 #define KNAV_QUEUE_PEEK_REG_INDEX	0
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@@ -60,8 +54,9 @@
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 #define knav_queue_idx_to_inst(kdev, idx)			\
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 	(kdev->instances + (idx << kdev->inst_shift))
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-#define for_each_handle_rcu(qh, inst)			\
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-	list_for_each_entry_rcu(qh, &inst->handles, list)
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+#define for_each_handle_rcu(qh, inst)				\
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+	list_for_each_entry_rcu(qh, &inst->handles, list,	\
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+				knav_dev_lock_held())
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 #define for_each_instance(idx, inst, kdev)		\
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 	for (idx = 0, inst = kdev->instances;		\
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@@ -414,7 +409,7 @@
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 	return 0;
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 }
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-struct knav_range_ops knav_gp_range_ops = {
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+static struct knav_range_ops knav_gp_range_ops = {
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 	.set_notify	= knav_gp_set_notify,
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 	.open_queue	= knav_gp_open_queue,
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 	.close_queue	= knav_gp_close_queue,
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@@ -483,17 +478,7 @@
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 	return 0;
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 }
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-static int knav_queue_debug_open(struct inode *inode, struct file *file)
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-{
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-	return single_open(file, knav_queue_debug_show, NULL);
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-}
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-
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-static const struct file_operations knav_queue_debug_ops = {
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-	.open		= knav_queue_debug_open,
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-	.read		= seq_read,
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-	.llseek		= seq_lseek,
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-	.release	= single_release,
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-};
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+DEFINE_SHOW_ATTRIBUTE(knav_queue_debug);
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 static inline int knav_queue_pdsp_wait(u32 * __iomem addr, unsigned timeout,
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 					u32 flags)
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@@ -1390,15 +1375,15 @@
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 	ret = of_address_to_resource(node, index, &res);
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 	if (ret) {
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-		dev_err(kdev->dev, "Can't translate of node(%s) address for index(%d)\n",
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-			node->name, index);
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+		dev_err(kdev->dev, "Can't translate of node(%pOFn) address for index(%d)\n",
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+			node, index);
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 		return ERR_PTR(ret);
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 	}
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 	regs = devm_ioremap_resource(kdev->dev, &res);
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 	if (IS_ERR(regs))
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-		dev_err(kdev->dev, "Failed to map register base for index(%d) node(%s)\n",
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-			index, node->name);
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+		dev_err(kdev->dev, "Failed to map register base for index(%d) node(%pOFn)\n",
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+			index, node);
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 	return regs;
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 }
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@@ -1885,7 +1870,7 @@
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 	}
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 	debugfs_create_file("qmss", S_IFREG | S_IRUGO, NULL, NULL,
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-			    &knav_queue_debug_ops);
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+			    &knav_queue_debug_fops);
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 	device_ready = true;
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 	return 0;
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