add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/dma/mv_xor.c
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@@ -1,15 +1,7 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * offload engine driver for the Marvell XOR engine
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  * Copyright (C) 2007, 2008, Marvell International Ltd.
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms and conditions 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 it will be useful, but WITHOUT
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- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
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- * more details.
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  */
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 #include <linux/init.h>
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@@ -344,13 +336,13 @@
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 		mv_chan->dmachan.completed_cookie = cookie;
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 }
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-static void mv_xor_tasklet(unsigned long data)
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+static void mv_xor_tasklet(struct tasklet_struct *t)
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 {
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-	struct mv_xor_chan *chan = (struct mv_xor_chan *) data;
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+	struct mv_xor_chan *chan = from_tasklet(chan, t, irq_tasklet);
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-	spin_lock_bh(&chan->lock);
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+	spin_lock(&chan->lock);
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 	mv_chan_slot_cleanup(chan);
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-	spin_unlock_bh(&chan->lock);
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+	spin_unlock(&chan->lock);
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 }
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 static struct mv_xor_desc_slot *
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@@ -1105,8 +1097,7 @@
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 	mv_chan->mmr_base = xordev->xor_base;
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 	mv_chan->mmr_high_base = xordev->xor_high_base;
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-	tasklet_init(&mv_chan->irq_tasklet, mv_xor_tasklet, (unsigned long)
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-		     mv_chan);
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+	tasklet_setup(&mv_chan->irq_tasklet, mv_xor_tasklet);
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 	/* clear errors before enabling interrupts */
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 	mv_chan_clear_err_status(mv_chan);
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@@ -1153,7 +1144,10 @@
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 		 dma_has_cap(DMA_MEMCPY, dma_dev->cap_mask) ? "cpy " : "",
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 		 dma_has_cap(DMA_INTERRUPT, dma_dev->cap_mask) ? "intr " : "");
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-	dma_async_device_register(dma_dev);
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+	ret = dma_async_device_register(dma_dev);
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+	if (ret)
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+		goto err_free_irq;
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+
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 	return mv_chan;
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 err_free_irq: