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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/drivers/dma/qcom/hidma_ll.c
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@@ -1,16 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Qualcomm Technologies HIDMA DMA engine low level code
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  *
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  * Copyright (c) 2015-2016, The Linux Foundation. All rights reserved.
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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 and
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- * only 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,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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  */
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 #include <linux/dmaengine.h>
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@@ -181,9 +173,9 @@
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 /*
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  * Multiple TREs may be queued and waiting in the pending queue.
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  */
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-static void hidma_ll_tre_complete(unsigned long arg)
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+static void hidma_ll_tre_complete(struct tasklet_struct *t)
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 {
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-	struct hidma_lldev *lldev = (struct hidma_lldev *)arg;
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+	struct hidma_lldev *lldev = from_tasklet(lldev, t, task);
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 	struct hidma_tre *tre;
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 	while (kfifo_out(&lldev->handoff_fifo, &tre, 1)) {
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@@ -757,7 +749,6 @@
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 	if (!lldev->tre_ring)
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 		return NULL;
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-	memset(lldev->tre_ring, 0, (HIDMA_TRE_SIZE + 1) * nr_tres);
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 	lldev->tre_ring_size = HIDMA_TRE_SIZE * nr_tres;
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 	lldev->nr_tres = nr_tres;
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@@ -777,7 +768,6 @@
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 	if (!lldev->evre_ring)
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 		return NULL;
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-	memset(lldev->evre_ring, 0, (HIDMA_EVRE_SIZE + 1) * nr_tres);
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 	lldev->evre_ring_size = HIDMA_EVRE_SIZE * nr_tres;
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 	/* the EVRE ring has to be EVRE_SIZE aligned */
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@@ -802,7 +792,7 @@
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 		return NULL;
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 	spin_lock_init(&lldev->lock);
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-	tasklet_init(&lldev->task, hidma_ll_tre_complete, (unsigned long)lldev);
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+	tasklet_setup(&lldev->task, hidma_ll_tre_complete);
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 	lldev->initialized = 1;
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 	writel(ENABLE_IRQS, lldev->evca + HIDMA_EVCA_IRQ_EN_REG);
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 	return lldev;