add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/dma/bcm-sba-raid.c
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@@ -120,7 +120,7 @@
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 	struct brcm_message msg;
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 	struct dma_async_tx_descriptor tx;
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 	/* SBA commands */
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-	struct brcm_sba_command cmds[0];
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+	struct brcm_sba_command cmds[];
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 };
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 enum sba_version {
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@@ -164,7 +164,6 @@
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 	struct list_head reqs_free_list;
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 	/* DebugFS directory entries */
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 	struct dentry *root;
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-	struct dentry *stats;
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 };
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 /* ====== Command helper routines ===== */
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@@ -1459,8 +1458,7 @@
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 static int sba_debugfs_stats_show(struct seq_file *file, void *offset)
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 {
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-	struct platform_device *pdev = to_platform_device(file->private);
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-	struct sba_device *sba = platform_get_drvdata(pdev);
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+	struct sba_device *sba = dev_get_drvdata(file->private);
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 	/* Write stats in file */
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 	sba_write_stats_in_seqfile(sba, file);
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@@ -1717,17 +1715,11 @@
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 	/* Create debugfs root entry */
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 	sba->root = debugfs_create_dir(dev_name(sba->dev), NULL);
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-	if (IS_ERR_OR_NULL(sba->root)) {
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-		dev_err(sba->dev, "failed to create debugfs root entry\n");
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-		sba->root = NULL;
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-		goto skip_debugfs;
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-	}
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 	/* Create debugfs stats entry */
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-	sba->stats = debugfs_create_devm_seqfile(sba->dev, "stats", sba->root,
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-						 sba_debugfs_stats_show);
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-	if (IS_ERR_OR_NULL(sba->stats))
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-		dev_err(sba->dev, "failed to create debugfs stats file\n");
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+	debugfs_create_devm_seqfile(sba->dev, "stats", sba->root,
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+				    sba_debugfs_stats_show);
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+
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 skip_debugfs:
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 	/* Register DMA device with Linux async framework */