linux-kernel - [PATCH 22/35] dma: qcom: convert tasklets to use new tasklet

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Message-Id: <20200817081726.20213-23-allen.lkml@gmail.com>
Date:   Mon, 17 Aug 2020 13:47:13 +0530
From:   Allen Pais <allen.lkml@...il.com>
To:     shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-imx@....com, ast@...nel.org,
        daniel@...earbox.net, kafai@...com, songliubraving@...com,
        yhs@...com, andriin@...com, john.fastabend@...il.com,
        kpsingh@...omium.org, baohua@...nel.org, mripard@...nel.org,
        wens@...e.org, thierry.reding@...il.com, jonathanh@...dia.com,
        michal.simek@...inx.com, matthias.bgg@...il.com
Cc:     keescook@...omium.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org,
        bpf@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        Allen Pais <allen.lkml@...il.com>,
        Romain Perier <romain.perier@...il.com>
Subject: [PATCH 22/35] dma: qcom: convert tasklets to use new tasklet_setup() API

In preparation for unconditionally passing the
struct tasklet_struct pointer to all tasklet
callbacks, switch to using the new tasklet_setup()
and from_tasklet() to pass the tasklet pointer explicitly.

Signed-off-by: Romain Perier <romain.perier@...il.com>
Signed-off-by: Allen Pais <allen.lkml@...il.com>
---
 drivers/dma/qcom/bam_dma.c  | 6 +++---
 drivers/dma/qcom/hidma.c    | 6 +++---
 drivers/dma/qcom/hidma_ll.c | 6 +++---
 3 files changed, 9 insertions(+), 9 deletions(-)

diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
index 5a08dd0d3388..8ba7a8f089c8 100644
--- a/drivers/dma/qcom/bam_dma.c
+++ b/drivers/dma/qcom/bam_dma.c
@@ -1075,9 +1075,9 @@ static void bam_start_dma(struct bam_chan *bchan)
  *
  * Sets up next DMA operation and then processes all completed transactions
  */
-static void dma_tasklet(unsigned long data)
+static void dma_tasklet(struct tasklet_struct *t)
 {
-	struct bam_device *bdev = (struct bam_device *)data;
+	struct bam_device *bdev = from_tasklet(bdev, t, task);
 	struct bam_chan *bchan;
 	unsigned long flags;
 	unsigned int i;
@@ -1293,7 +1293,7 @@ static int bam_dma_probe(struct platform_device *pdev)
 	if (ret)
 		goto err_disable_clk;
 
-	tasklet_init(&bdev->task, dma_tasklet, (unsigned long)bdev);
+	tasklet_setup(&bdev->task, dma_tasklet);
 
 	bdev->channels = devm_kcalloc(bdev->dev, bdev->num_channels,
 				sizeof(*bdev->channels), GFP_KERNEL);
diff --git a/drivers/dma/qcom/hidma.c b/drivers/dma/qcom/hidma.c
index 0a6d3ea08c78..6c0f9eb8ecc6 100644
--- a/drivers/dma/qcom/hidma.c
+++ b/drivers/dma/qcom/hidma.c
@@ -224,9 +224,9 @@ static int hidma_chan_init(struct hidma_dev *dmadev, u32 dma_sig)
 	return 0;
 }
 
-static void hidma_issue_task(unsigned long arg)
+static void hidma_issue_task(struct tasklet_struct *t)
 {
-	struct hidma_dev *dmadev = (struct hidma_dev *)arg;
+	struct hidma_dev *dmadev = from_tasklet(dmadev, t, task);
 
 	pm_runtime_get_sync(dmadev->ddev.dev);
 	hidma_ll_start(dmadev->lldev);
@@ -885,7 +885,7 @@ static int hidma_probe(struct platform_device *pdev)
 		goto uninit;
 
 	dmadev->irq = chirq;
-	tasklet_init(&dmadev->task, hidma_issue_task, (unsigned long)dmadev);
+	tasklet_setup(&dmadev->task, hidma_issue_task);
 	hidma_debug_init(dmadev);
 	hidma_sysfs_init(dmadev);
 	dev_info(&pdev->dev, "HI-DMA engine driver registration complete\n");
diff --git a/drivers/dma/qcom/hidma_ll.c b/drivers/dma/qcom/hidma_ll.c
index bb4471e84e48..53244e0e34a3 100644
--- a/drivers/dma/qcom/hidma_ll.c
+++ b/drivers/dma/qcom/hidma_ll.c
@@ -173,9 +173,9 @@ int hidma_ll_request(struct hidma_lldev *lldev, u32 sig, const char *dev_name,
 /*
  * Multiple TREs may be queued and waiting in the pending queue.
  */
-static void hidma_ll_tre_complete(unsigned long arg)
+static void hidma_ll_tre_complete(struct tasklet_struct *t)
 {
-	struct hidma_lldev *lldev = (struct hidma_lldev *)arg;
+	struct hidma_lldev *lldev = from_tasklet(lldev, t, task);
 	struct hidma_tre *tre;
 
 	while (kfifo_out(&lldev->handoff_fifo, &tre, 1)) {
@@ -792,7 +792,7 @@ struct hidma_lldev *hidma_ll_init(struct device *dev, u32 nr_tres,
 		return NULL;
 
 	spin_lock_init(&lldev->lock);
-	tasklet_init(&lldev->task, hidma_ll_tre_complete, (unsigned long)lldev);
+	tasklet_setup(&lldev->task, hidma_ll_tre_complete);
 	lldev->initialized = 1;
 	writel(ENABLE_IRQS, lldev->evca + HIDMA_EVCA_IRQ_EN_REG);
 	return lldev;
-- 
2.17.1