修改内核路径

hc

2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b

 kernel/drivers/dma/pxa_dma.c
..
..
@@ -1,9 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Copyright 2015 Robert Jarzmik <robert.jarzmik@free.fr>
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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 version 2 as
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- * published by the Free Software Foundation.
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  */
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5
 
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 #include <linux/err.h>
..
..
@@ -132,7 +129,6 @@
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 	spinlock_t			phy_lock;	/* Phy association */
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 #ifdef CONFIG_DEBUG_FS
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 	struct dentry			*dbgfs_root;
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-	struct dentry			*dbgfs_state;
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 	struct dentry			**dbgfs_chan;
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 #endif
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 };
..
..
@@ -179,7 +175,7 @@
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 	return 0x1000 + line * 4;
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 }
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-bool pxad_filter_fn(struct dma_chan *chan, void *param);
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+static bool pxad_filter_fn(struct dma_chan *chan, void *param);
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 /*
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  * Debug fs
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@@ -189,7 +185,7 @@
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 #include <linux/uaccess.h>
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 #include <linux/seq_file.h>
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187
 
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-static int dbg_show_requester_chan(struct seq_file *s, void *p)
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+static int requester_chan_show(struct seq_file *s, void *p)
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 {
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 	struct pxad_phy *phy = s->private;
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 	int i;
..
..
@@ -220,7 +216,7 @@
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 #define PXA_DCSR_STR(flag) (dcsr & PXA_DCSR_##flag ? #flag" " : "")
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 #define PXA_DCMD_STR(flag) (dcmd & PXA_DCMD_##flag ? #flag" " : "")
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-static int dbg_show_descriptors(struct seq_file *s, void *p)
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+static int descriptors_show(struct seq_file *s, void *p)
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 {
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 	struct pxad_phy *phy = s->private;
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 	int i, max_show = 20, burst, width;
..
..
@@ -263,7 +259,7 @@
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 	return 0;
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 }
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261
 
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-static int dbg_show_chan_state(struct seq_file *s, void *p)
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+static int chan_state_show(struct seq_file *s, void *p)
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 {
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 	struct pxad_phy *phy = s->private;
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 	u32 dcsr, dcmd;
..
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@@ -306,7 +302,7 @@
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 	return 0;
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 }
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-static int dbg_show_state(struct seq_file *s, void *p)
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+static int state_show(struct seq_file *s, void *p)
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 {
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 	struct pxad_device *pdev = s->private;
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..
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@@ -317,52 +313,27 @@
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 	return 0;
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 }
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-#define DBGFS_FUNC_DECL(name) \
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-static int dbg_open_##name(struct inode *inode, struct file *file) \
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-{ \
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-	return single_open(file, dbg_show_##name, inode->i_private); \
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-} \
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-static const struct file_operations dbg_fops_##name = { \
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-	.open		= dbg_open_##name, \
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-	.llseek		= seq_lseek, \
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-	.read		= seq_read, \
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-	.release	= single_release, \
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-}
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-
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-DBGFS_FUNC_DECL(state);
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-DBGFS_FUNC_DECL(chan_state);
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-DBGFS_FUNC_DECL(descriptors);
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-DBGFS_FUNC_DECL(requester_chan);
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+DEFINE_SHOW_ATTRIBUTE(state);
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+DEFINE_SHOW_ATTRIBUTE(chan_state);
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+DEFINE_SHOW_ATTRIBUTE(descriptors);
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+DEFINE_SHOW_ATTRIBUTE(requester_chan);
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 static struct dentry *pxad_dbg_alloc_chan(struct pxad_device *pdev,
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 					     int ch, struct dentry *chandir)
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 {
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 	char chan_name[11];
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-	struct dentry *chan, *chan_state = NULL, *chan_descr = NULL;
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-	struct dentry *chan_reqs = NULL;
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+	struct dentry *chan;
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 	void *dt;
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 	scnprintf(chan_name, sizeof(chan_name), "%d", ch);
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 	chan = debugfs_create_dir(chan_name, chandir);
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 	dt = (void *)&pdev->phys[ch];
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-	if (chan)
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-		chan_state = debugfs_create_file("state", 0400, chan, dt,
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-						 &dbg_fops_chan_state);
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-	if (chan_state)
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-		chan_descr = debugfs_create_file("descriptors", 0400, chan, dt,
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-						 &dbg_fops_descriptors);
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-	if (chan_descr)
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-		chan_reqs = debugfs_create_file("requesters", 0400, chan, dt,
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-						&dbg_fops_requester_chan);
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-	if (!chan_reqs)
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-		goto err_state;
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+	debugfs_create_file("state", 0400, chan, dt, &chan_state_fops);
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+	debugfs_create_file("descriptors", 0400, chan, dt, &descriptors_fops);
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+	debugfs_create_file("requesters", 0400, chan, dt, &requester_chan_fops);
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 	return chan;
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-
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-err_state:
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-	debugfs_remove_recursive(chan);
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-	return NULL;
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 }
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 static void pxad_init_debugfs(struct pxad_device *pdev)
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@@ -370,40 +341,20 @@
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 	int i;
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 	struct dentry *chandir;
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-	pdev->dbgfs_root = debugfs_create_dir(dev_name(pdev->slave.dev), NULL);
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-	if (IS_ERR(pdev->dbgfs_root) || !pdev->dbgfs_root)
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-		goto err_root;
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-
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-	pdev->dbgfs_state = debugfs_create_file("state", 0400, pdev->dbgfs_root,
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-						pdev, &dbg_fops_state);
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-	if (!pdev->dbgfs_state)
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-		goto err_state;
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-
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 	pdev->dbgfs_chan =
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-		kmalloc_array(pdev->nr_chans, sizeof(*pdev->dbgfs_state),
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+		kmalloc_array(pdev->nr_chans, sizeof(struct dentry *),
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 			      GFP_KERNEL);
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 	if (!pdev->dbgfs_chan)
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-		goto err_alloc;
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+		return;
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+
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+	pdev->dbgfs_root = debugfs_create_dir(dev_name(pdev->slave.dev), NULL);
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+
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+	debugfs_create_file("state", 0400, pdev->dbgfs_root, pdev, &state_fops);
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 	chandir = debugfs_create_dir("channels", pdev->dbgfs_root);
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-	if (!chandir)
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-		goto err_chandir;
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-	for (i = 0; i < pdev->nr_chans; i++) {
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+	for (i = 0; i < pdev->nr_chans; i++)
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 		pdev->dbgfs_chan[i] = pxad_dbg_alloc_chan(pdev, i, chandir);
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-		if (!pdev->dbgfs_chan[i])
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-			goto err_chans;
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-	}
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-
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-	return;
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-err_chans:
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-err_chandir:
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-	kfree(pdev->dbgfs_chan);
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-err_alloc:
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-err_state:
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-	debugfs_remove_recursive(pdev->dbgfs_root);
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-err_root:
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-	pr_err("pxad: debugfs is not available\n");
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 }
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 static void pxad_cleanup_debugfs(struct pxad_device *pdev)
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@@ -1278,7 +1229,6 @@
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 	pxad_cleanup_debugfs(pdev);
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 	pxad_free_channels(&pdev->slave);
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-	dma_async_device_unregister(&pdev->slave);
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 	return 0;
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 }
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@@ -1299,14 +1249,14 @@
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 		return -ENOMEM;
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 	for (i = 0; i < nb_phy_chans; i++)
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-		if (platform_get_irq(op, i) > 0)
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+		if (platform_get_irq_optional(op, i) > 0)
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 			nr_irq++;
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 	for (i = 0; i < nb_phy_chans; i++) {
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 		phy = &pdev->phys[i];
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 		phy->base = pdev->base;
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 		phy->idx = i;
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-		irq = platform_get_irq(op, i);
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+		irq = platform_get_irq_optional(op, i);
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 		if ((nr_irq > 1) && (irq > 0))
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 			ret = devm_request_irq(&op->dev, irq,
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 					       pxad_chan_handler,
..
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@@ -1389,7 +1339,7 @@
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 		init_waitqueue_head(&c->wq_state);
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 	}
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-	return dma_async_device_register(&pdev->slave);
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+	return dmaenginem_async_device_register(&pdev->slave);
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 }
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 static int pxad_probe(struct platform_device *op)
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@@ -1426,7 +1376,7 @@
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 				 "#dma-requests set to default 32 as missing in OF: %d",
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 				 ret);
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 			nb_requestors = 32;
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-		};
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+		}
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 	} else if (pdata && pdata->dma_channels) {
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 		dma_channels = pdata->dma_channels;
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 		nb_requestors = pdata->nb_requestors;
..
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@@ -1494,7 +1444,7 @@
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 	.remove		= pxad_remove,
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 };
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-bool pxad_filter_fn(struct dma_chan *chan, void *param)
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+static bool pxad_filter_fn(struct dma_chan *chan, void *param)
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 {
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 	struct pxad_chan *c = to_pxad_chan(chan);
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 	struct pxad_param *p = param;
..
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@@ -1507,7 +1457,6 @@
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 	return true;
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 }
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-EXPORT_SYMBOL_GPL(pxad_filter_fn);
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 module_platform_driver(pxad_driver);
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