Re: [PATCH v2 1/2] dmaengine: virt-dma: convert tasklet to BH workqueue for callback invocation

[Alexander Kochetkov <al.kochet@gmail.com>]

Hello Vinod!

This patch [1] has not been merged into the linux. What do I need to do to get it accepted?
I guess what that happened, because I sent it as series [2] with test patch [3], that generate test robot error.

Regards,
Alexander.

[1] https://lore.kernel.org/dmaengine/20250616124934.141782-2-al.kochet@gmail.com/
[2] https://lore.kernel.org/dmaengine/20250616124934.141782-1-al.kochet@gmail.com/
[3] https://lore.kernel.org/dmaengine/20250616124934.141782-3-al.kochet@gmail.com/

> 16 июня 2025 г., в 15:48, Alexander Kochetkov <al.kochet@gmail.com> написал(а):
> 
> Currently DMA callbacks are called from tasklet. However the tasklet is
> marked deprecated and must be replaced by BH workqueue. Tasklet callbacks
> are executed either in the Soft IRQ context or from ksoftirqd thread. BH
> workqueue work items are executed in the BH context. Changing tasklet to
> BH workqueue improved DMA callback latencies.
> 
> The commit changes virt-dma driver and all of its users:
> - tasklet is replaced to work_struct, tasklet callback updated accordingly
> - kill_tasklet() is replaced to cancel_work_sync()
> - added include of linux/interrupt.h where necessary
> 
> Tested on Pine64 (Allwinner A64 ARMv8) with sun6i-dma driver. All other
> drivers are changed similarly and tested for compilation.
> 
> Signed-off-by: Alexander Kochetkov <al.kochet@gmail.com>
> ---
> drivers/dma/amd/qdma/qdma.c                    |  1 +
> drivers/dma/arm-dma350.c                       |  1 +
> drivers/dma/bcm2835-dma.c                      |  2 +-
> drivers/dma/dma-axi-dmac.c                     |  8 ++++----
> drivers/dma/dma-jz4780.c                       |  2 +-
> drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c |  2 +-
> drivers/dma/dw-edma/dw-edma-core.c             |  2 +-
> drivers/dma/fsl-edma-common.c                  |  2 +-
> drivers/dma/fsl-edma-common.h                  |  1 +
> drivers/dma/fsl-qdma.c                         |  3 ++-
> drivers/dma/hisi_dma.c                         |  2 +-
> drivers/dma/hsu/hsu.c                          |  2 +-
> drivers/dma/idma64.c                           |  3 ++-
> drivers/dma/img-mdc-dma.c                      |  2 +-
> drivers/dma/imx-sdma.c                         |  2 +-
> drivers/dma/k3dma.c                            |  2 +-
> drivers/dma/loongson1-apb-dma.c                |  2 +-
> drivers/dma/mediatek/mtk-cqdma.c               |  2 +-
> drivers/dma/mediatek/mtk-hsdma.c               |  3 ++-
> drivers/dma/mediatek/mtk-uart-apdma.c          |  4 ++--
> drivers/dma/owl-dma.c                          |  2 +-
> drivers/dma/pxa_dma.c                          |  2 +-
> drivers/dma/qcom/bam_dma.c                     |  4 ++--
> drivers/dma/qcom/gpi.c                         |  1 +
> drivers/dma/qcom/qcom_adm.c                    |  2 +-
> drivers/dma/sa11x0-dma.c                       |  2 +-
> drivers/dma/sf-pdma/sf-pdma.c                  |  3 ++-
> drivers/dma/sprd-dma.c                         |  2 +-
> drivers/dma/st_fdma.c                          |  2 +-
> drivers/dma/stm32/stm32-dma.c                  |  1 +
> drivers/dma/stm32/stm32-dma3.c                 |  1 +
> drivers/dma/stm32/stm32-mdma.c                 |  1 +
> drivers/dma/sun6i-dma.c                        |  2 +-
> drivers/dma/tegra186-gpc-dma.c                 |  2 +-
> drivers/dma/tegra210-adma.c                    |  3 ++-
> drivers/dma/ti/edma.c                          |  2 +-
> drivers/dma/ti/k3-udma.c                       | 10 +++++-----
> drivers/dma/ti/omap-dma.c                      |  2 +-
> drivers/dma/uniphier-xdmac.c                   |  1 +
> drivers/dma/virt-dma.c                         |  8 ++++----
> drivers/dma/virt-dma.h                         | 10 +++++-----
> 41 files changed, 62 insertions(+), 49 deletions(-)
> 
> diff --git a/drivers/dma/amd/qdma/qdma.c b/drivers/dma/amd/qdma/qdma.c
> index 8fb2d5e1df20..538aa49c6a5f 100644
> --- a/drivers/dma/amd/qdma/qdma.c
> +++ b/drivers/dma/amd/qdma/qdma.c
> @@ -8,6 +8,7 @@
> #include <linux/bitops.h>
> #include <linux/dmaengine.h>
> #include <linux/dma-mapping.h>
> +#include <linux/interrupt.h>
> #include <linux/module.h>
> #include <linux/mod_devicetable.h>
> #include <linux/platform_device.h>
> diff --git a/drivers/dma/arm-dma350.c b/drivers/dma/arm-dma350.c
> index 9efe2ca7d5ec..9e87856ab559 100644
> --- a/drivers/dma/arm-dma350.c
> +++ b/drivers/dma/arm-dma350.c
> @@ -5,6 +5,7 @@
> #include <linux/bitfield.h>
> #include <linux/dmaengine.h>
> #include <linux/dma-mapping.h>
> +#include <linux/interrupt.h>
> #include <linux/io.h>
> #include <linux/of.h>
> #include <linux/module.h>
> diff --git a/drivers/dma/bcm2835-dma.c b/drivers/dma/bcm2835-dma.c
> index 0117bb2e8591..24411d7ac895 100644
> --- a/drivers/dma/bcm2835-dma.c
> +++ b/drivers/dma/bcm2835-dma.c
> @@ -846,7 +846,7 @@ static void bcm2835_dma_free(struct bcm2835_dmadev *od)
> list_for_each_entry_safe(c, next, &od->ddev.channels,
> vc.chan.device_node) {
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> }
> 
> dma_unmap_page_attrs(od->ddev.dev, od->zero_page, PAGE_SIZE,
> diff --git a/drivers/dma/dma-axi-dmac.c b/drivers/dma/dma-axi-dmac.c
> index 36943b0c6d60..181ba12b3ad4 100644
> --- a/drivers/dma/dma-axi-dmac.c
> +++ b/drivers/dma/dma-axi-dmac.c
> @@ -1041,9 +1041,9 @@ static int axi_dmac_detect_caps(struct axi_dmac *dmac, unsigned int version)
> return 0;
> }
> 
> -static void axi_dmac_tasklet_kill(void *task)
> +static void axi_dmac_cancel_work_sync(void *work)
> {
> - tasklet_kill(task);
> + cancel_work_sync(work);
> }
> 
> static void axi_dmac_free_dma_controller(void *of_node)
> @@ -1146,8 +1146,8 @@ static int axi_dmac_probe(struct platform_device *pdev)
> * Put the action in here so it get's done before unregistering the DMA
> * device.
> */
> - ret = devm_add_action_or_reset(&pdev->dev, axi_dmac_tasklet_kill,
> -       &dmac->chan.vchan.task);
> + ret = devm_add_action_or_reset(&pdev->dev, axi_dmac_cancel_work_sync,
> +       &dmac->chan.vchan.work);
> if (ret)
> return ret;
> 
> diff --git a/drivers/dma/dma-jz4780.c b/drivers/dma/dma-jz4780.c
> index 100057603fd4..90edd8286730 100644
> --- a/drivers/dma/dma-jz4780.c
> +++ b/drivers/dma/dma-jz4780.c
> @@ -1019,7 +1019,7 @@ static void jz4780_dma_remove(struct platform_device *pdev)
> free_irq(jzdma->irq, jzdma);
> 
> for (i = 0; i < jzdma->soc_data->nb_channels; i++)
> - tasklet_kill(&jzdma->chan[i].vchan.task);
> + cancel_work_sync(&jzdma->chan[i].vchan.work);
> }
> 
> static const struct jz4780_dma_soc_data jz4740_dma_soc_data = {
> diff --git a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> index b23536645ff7..3acf095c3994 100644
> --- a/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> +++ b/drivers/dma/dw-axi-dmac/dw-axi-dmac-platform.c
> @@ -1649,7 +1649,7 @@ static void dw_remove(struct platform_device *pdev)
> list_for_each_entry_safe(chan, _chan, &dw->dma.channels,
> vc.chan.device_node) {
> list_del(&chan->vc.chan.device_node);
> - tasklet_kill(&chan->vc.task);
> + cancel_work_sync(&chan->vc.work);
> }
> }
> 
> diff --git a/drivers/dma/dw-edma/dw-edma-core.c b/drivers/dma/dw-edma/dw-edma-core.c
> index c2b88cc99e5d..a613b2c64e8a 100644
> --- a/drivers/dma/dw-edma/dw-edma-core.c
> +++ b/drivers/dma/dw-edma/dw-edma-core.c
> @@ -1005,7 +1005,7 @@ int dw_edma_remove(struct dw_edma_chip *chip)
> dma_async_device_unregister(&dw->dma);
> list_for_each_entry_safe(chan, _chan, &dw->dma.channels,
> vc.chan.device_node) {
> - tasklet_kill(&chan->vc.task);
> + cancel_work_sync(&chan->vc.work);
> list_del(&chan->vc.chan.device_node);
> }
> 
> diff --git a/drivers/dma/fsl-edma-common.c b/drivers/dma/fsl-edma-common.c
> index 4976d7dde080..9a498c14471a 100644
> --- a/drivers/dma/fsl-edma-common.c
> +++ b/drivers/dma/fsl-edma-common.c
> @@ -894,7 +894,7 @@ void fsl_edma_cleanup_vchan(struct dma_device *dmadev)
> list_for_each_entry_safe(chan, _chan,
> &dmadev->channels, vchan.chan.device_node) {
> list_del(&chan->vchan.chan.device_node);
> - tasklet_kill(&chan->vchan.task);
> + cancel_work_sync(&chan->vchan.work);
> }
> }
> 
> diff --git a/drivers/dma/fsl-edma-common.h b/drivers/dma/fsl-edma-common.h
> index 205a96489094..1bd80d68f5ec 100644
> --- a/drivers/dma/fsl-edma-common.h
> +++ b/drivers/dma/fsl-edma-common.h
> @@ -7,6 +7,7 @@
> #define _FSL_EDMA_COMMON_H_
> 
> #include <linux/dma-direction.h>
> +#include <linux/interrupt.h>
> #include <linux/platform_device.h>
> #include "virt-dma.h"
> 
> diff --git a/drivers/dma/fsl-qdma.c b/drivers/dma/fsl-qdma.c
> index 823f5c6bc2e1..bab0bb9fd986 100644
> --- a/drivers/dma/fsl-qdma.c
> +++ b/drivers/dma/fsl-qdma.c
> @@ -16,6 +16,7 @@
> #include <linux/of.h>
> #include <linux/of_dma.h>
> #include <linux/dma-mapping.h>
> +#include <linux/interrupt.h>
> #include <linux/platform_device.h>
> 
> #include "virt-dma.h"
> @@ -1261,7 +1262,7 @@ static void fsl_qdma_cleanup_vchan(struct dma_device *dmadev)
> list_for_each_entry_safe(chan, _chan,
> &dmadev->channels, vchan.chan.device_node) {
> list_del(&chan->vchan.chan.device_node);
> - tasklet_kill(&chan->vchan.task);
> + cancel_work_sync(&chan->vchan.work);
> }
> }
> 
> diff --git a/drivers/dma/hisi_dma.c b/drivers/dma/hisi_dma.c
> index 25a4134be36b..0cddb4949051 100644
> --- a/drivers/dma/hisi_dma.c
> +++ b/drivers/dma/hisi_dma.c
> @@ -720,7 +720,7 @@ static void hisi_dma_disable_qps(struct hisi_dma_dev *hdma_dev)
> 
> for (i = 0; i < hdma_dev->chan_num; i++) {
> hisi_dma_disable_qp(hdma_dev, i);
> - tasklet_kill(&hdma_dev->chan[i].vc.task);
> + cancel_work_sync(&hdma_dev->chan[i].vc.work);
> }
> }
> 
> diff --git a/drivers/dma/hsu/hsu.c b/drivers/dma/hsu/hsu.c
> index af5a2e252c25..4ea3f18a20ac 100644
> --- a/drivers/dma/hsu/hsu.c
> +++ b/drivers/dma/hsu/hsu.c
> @@ -500,7 +500,7 @@ int hsu_dma_remove(struct hsu_dma_chip *chip)
> for (i = 0; i < hsu->nr_channels; i++) {
> struct hsu_dma_chan *hsuc = &hsu->chan[i];
> 
> - tasklet_kill(&hsuc->vchan.task);
> + cancel_work_sync(&hsuc->vchan.work);
> }
> 
> return 0;
> diff --git a/drivers/dma/idma64.c b/drivers/dma/idma64.c
> index d147353d47ab..fd8d30a02153 100644
> --- a/drivers/dma/idma64.c
> +++ b/drivers/dma/idma64.c
> @@ -12,6 +12,7 @@
> #include <linux/dma-mapping.h>
> #include <linux/dmapool.h>
> #include <linux/init.h>
> +#include <linux/interrupt.h>
> #include <linux/module.h>
> #include <linux/platform_device.h>
> #include <linux/slab.h>
> @@ -624,7 +625,7 @@ static void idma64_remove(struct idma64_chip *chip)
> for (i = 0; i < idma64->dma.chancnt; i++) {
> struct idma64_chan *idma64c = &idma64->chan[i];
> 
> - tasklet_kill(&idma64c->vchan.task);
> + cancel_work_sync(&idma64c->vchan.work);
> }
> }
> 
> diff --git a/drivers/dma/img-mdc-dma.c b/drivers/dma/img-mdc-dma.c
> index fd55bcd060ab..4fea332497a8 100644
> --- a/drivers/dma/img-mdc-dma.c
> +++ b/drivers/dma/img-mdc-dma.c
> @@ -1031,7 +1031,7 @@ static void mdc_dma_remove(struct platform_device *pdev)
> 
> devm_free_irq(&pdev->dev, mchan->irq, mchan);
> 
> - tasklet_kill(&mchan->vc.task);
> + cancel_work_sync(&mchan->vc.work);
> }
> 
> pm_runtime_disable(&pdev->dev);
> diff --git a/drivers/dma/imx-sdma.c b/drivers/dma/imx-sdma.c
> index 02a85d6f1bea..37a3b60a7b3f 100644
> --- a/drivers/dma/imx-sdma.c
> +++ b/drivers/dma/imx-sdma.c
> @@ -2427,7 +2427,7 @@ static void sdma_remove(struct platform_device *pdev)
> for (i = 0; i < MAX_DMA_CHANNELS; i++) {
> struct sdma_channel *sdmac = &sdma->channel[i];
> 
> - tasklet_kill(&sdmac->vc.task);
> + cancel_work_sync(&sdmac->vc.work);
> sdma_free_chan_resources(&sdmac->vc.chan);
> }
> 
> diff --git a/drivers/dma/k3dma.c b/drivers/dma/k3dma.c
> index acc2983e28e0..6ff3dd252aa2 100644
> --- a/drivers/dma/k3dma.c
> +++ b/drivers/dma/k3dma.c
> @@ -981,7 +981,7 @@ static void k3_dma_remove(struct platform_device *op)
> 
> list_for_each_entry_safe(c, cn, &d->slave.channels, vc.chan.device_node) {
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> }
> tasklet_kill(&d->task);
> clk_disable_unprepare(d->clk);
> diff --git a/drivers/dma/loongson1-apb-dma.c b/drivers/dma/loongson1-apb-dma.c
> index 255fe7eca212..f5a1c3efad62 100644
> --- a/drivers/dma/loongson1-apb-dma.c
> +++ b/drivers/dma/loongson1-apb-dma.c
> @@ -552,7 +552,7 @@ static void ls1x_dma_chan_remove(struct ls1x_dma *dma)
> 
> if (chan->vc.chan.device == &dma->ddev) {
> list_del(&chan->vc.chan.device_node);
> - tasklet_kill(&chan->vc.task);
> + cancel_work_sync(&chan->vc.work);
> }
> }
> }
> diff --git a/drivers/dma/mediatek/mtk-cqdma.c b/drivers/dma/mediatek/mtk-cqdma.c
> index 47c8adfdc155..a659484a4ecc 100644
> --- a/drivers/dma/mediatek/mtk-cqdma.c
> +++ b/drivers/dma/mediatek/mtk-cqdma.c
> @@ -895,7 +895,7 @@ static void mtk_cqdma_remove(struct platform_device *pdev)
> vc = &cqdma->vc[i];
> 
> list_del(&vc->vc.chan.device_node);
> - tasklet_kill(&vc->vc.task);
> + cancel_work_sync(&vc->vc.work);
> }
> 
> /* disable interrupt */
> diff --git a/drivers/dma/mediatek/mtk-hsdma.c b/drivers/dma/mediatek/mtk-hsdma.c
> index fa77bb24a430..dea6dd61b71f 100644
> --- a/drivers/dma/mediatek/mtk-hsdma.c
> +++ b/drivers/dma/mediatek/mtk-hsdma.c
> @@ -13,6 +13,7 @@
> #include <linux/dmaengine.h>
> #include <linux/dma-mapping.h>
> #include <linux/err.h>
> +#include <linux/interrupt.h>
> #include <linux/iopoll.h>
> #include <linux/list.h>
> #include <linux/module.h>
> @@ -1020,7 +1021,7 @@ static void mtk_hsdma_remove(struct platform_device *pdev)
> vc = &hsdma->vc[i];
> 
> list_del(&vc->vc.chan.device_node);
> - tasklet_kill(&vc->vc.task);
> + cancel_work_sync(&vc->vc.work);
> }
> 
> /* Disable DMA interrupt */
> diff --git a/drivers/dma/mediatek/mtk-uart-apdma.c b/drivers/dma/mediatek/mtk-uart-apdma.c
> index 08e15177427b..2e8e8c698fe3 100644
> --- a/drivers/dma/mediatek/mtk-uart-apdma.c
> +++ b/drivers/dma/mediatek/mtk-uart-apdma.c
> @@ -312,7 +312,7 @@ static void mtk_uart_apdma_free_chan_resources(struct dma_chan *chan)
> 
> free_irq(c->irq, chan);
> 
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> 
> vchan_free_chan_resources(&c->vc);
> 
> @@ -463,7 +463,7 @@ static void mtk_uart_apdma_free(struct mtk_uart_apdmadev *mtkd)
> struct mtk_chan, vc.chan.device_node);
> 
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> }
> }
> 
> diff --git a/drivers/dma/owl-dma.c b/drivers/dma/owl-dma.c
> index 57cec757d8f5..36e5a7c1d993 100644
> --- a/drivers/dma/owl-dma.c
> +++ b/drivers/dma/owl-dma.c
> @@ -1055,7 +1055,7 @@ static inline void owl_dma_free(struct owl_dma *od)
> list_for_each_entry_safe(vchan,
> next, &od->dma.channels, vc.chan.device_node) {
> list_del(&vchan->vc.chan.device_node);
> - tasklet_kill(&vchan->vc.task);
> + cancel_work_sync(&vchan->vc.work);
> }
> }
> 
> diff --git a/drivers/dma/pxa_dma.c b/drivers/dma/pxa_dma.c
> index 249296389771..0db0ad5296e7 100644
> --- a/drivers/dma/pxa_dma.c
> +++ b/drivers/dma/pxa_dma.c
> @@ -1218,7 +1218,7 @@ static void pxad_free_channels(struct dma_device *dmadev)
> list_for_each_entry_safe(c, cn, &dmadev->channels,
> vc.chan.device_node) {
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> }
> }
> 
> diff --git a/drivers/dma/qcom/bam_dma.c b/drivers/dma/qcom/bam_dma.c
> index bbc3276992bb..b45fa2e6910a 100644
> --- a/drivers/dma/qcom/bam_dma.c
> +++ b/drivers/dma/qcom/bam_dma.c
> @@ -1373,7 +1373,7 @@ static int bam_dma_probe(struct platform_device *pdev)
> dma_async_device_unregister(&bdev->common);
> err_bam_channel_exit:
> for (i = 0; i < bdev->num_channels; i++)
> - tasklet_kill(&bdev->channels[i].vc.task);
> + cancel_work_sync(&bdev->channels[i].vc.work);
> err_tasklet_kill:
> tasklet_kill(&bdev->task);
> err_disable_clk:
> @@ -1399,7 +1399,7 @@ static void bam_dma_remove(struct platform_device *pdev)
> 
> for (i = 0; i < bdev->num_channels; i++) {
> bam_dma_terminate_all(&bdev->channels[i].vc.chan);
> - tasklet_kill(&bdev->channels[i].vc.task);
> + cancel_work_sync(&bdev->channels[i].vc.work);
> 
> if (!bdev->channels[i].fifo_virt)
> continue;
> diff --git a/drivers/dma/qcom/gpi.c b/drivers/dma/qcom/gpi.c
> index b1f0001cc99c..865d3b35d4e6 100644
> --- a/drivers/dma/qcom/gpi.c
> +++ b/drivers/dma/qcom/gpi.c
> @@ -8,6 +8,7 @@
> #include <linux/bitfield.h>
> #include <linux/dma-mapping.h>
> #include <linux/dmaengine.h>
> +#include <linux/interrupt.h>
> #include <linux/module.h>
> #include <linux/of_dma.h>
> #include <linux/platform_device.h>
> diff --git a/drivers/dma/qcom/qcom_adm.c b/drivers/dma/qcom/qcom_adm.c
> index 6be54fddcee1..c60a5bc17d99 100644
> --- a/drivers/dma/qcom/qcom_adm.c
> +++ b/drivers/dma/qcom/qcom_adm.c
> @@ -919,7 +919,7 @@ static void adm_dma_remove(struct platform_device *pdev)
> /* mask IRQs for this channel/EE pair */
> writel(0, adev->regs + ADM_CH_RSLT_CONF(achan->id, adev->ee));
> 
> - tasklet_kill(&adev->channels[i].vc.task);
> + cancel_work_sync(&adev->channels[i].vc.work);
> adm_terminate_all(&adev->channels[i].vc.chan);
> }
> 
> diff --git a/drivers/dma/sa11x0-dma.c b/drivers/dma/sa11x0-dma.c
> index dc1a9a05252e..619430fcb2f4 100644
> --- a/drivers/dma/sa11x0-dma.c
> +++ b/drivers/dma/sa11x0-dma.c
> @@ -893,7 +893,7 @@ static void sa11x0_dma_free_channels(struct dma_device *dmadev)
> 
> list_for_each_entry_safe(c, cn, &dmadev->channels, vc.chan.device_node) {
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> kfree(c);
> }
> }
> diff --git a/drivers/dma/sf-pdma/sf-pdma.c b/drivers/dma/sf-pdma/sf-pdma.c
> index 7ad3c29be146..09ea2e27df44 100644
> --- a/drivers/dma/sf-pdma/sf-pdma.c
> +++ b/drivers/dma/sf-pdma/sf-pdma.c
> @@ -19,6 +19,7 @@
> #include <linux/platform_device.h>
> #include <linux/mod_devicetable.h>
> #include <linux/dma-mapping.h>
> +#include <linux/interrupt.h>
> #include <linux/of.h>
> #include <linux/of_dma.h>
> #include <linux/slab.h>
> @@ -603,7 +604,7 @@ static void sf_pdma_remove(struct platform_device *pdev)
> devm_free_irq(&pdev->dev, ch->txirq, ch);
> devm_free_irq(&pdev->dev, ch->errirq, ch);
> list_del(&ch->vchan.chan.device_node);
> - tasklet_kill(&ch->vchan.task);
> + cancel_work_sync(&ch->vchan.work);
> tasklet_kill(&ch->done_tasklet);
> tasklet_kill(&ch->err_tasklet);
> }
> diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
> index 187a090463ce..ac8fd7dd63eb 100644
> --- a/drivers/dma/sprd-dma.c
> +++ b/drivers/dma/sprd-dma.c
> @@ -1253,7 +1253,7 @@ static void sprd_dma_remove(struct platform_device *pdev)
> list_for_each_entry_safe(c, cn, &sdev->dma_dev.channels,
> vc.chan.device_node) {
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> }
> 
> of_dma_controller_free(pdev->dev.of_node);
> diff --git a/drivers/dma/st_fdma.c b/drivers/dma/st_fdma.c
> index c65ee0c7bfbd..ccedcb744dc5 100644
> --- a/drivers/dma/st_fdma.c
> +++ b/drivers/dma/st_fdma.c
> @@ -733,7 +733,7 @@ static void st_fdma_free(struct st_fdma_dev *fdev)
> for (i = 0; i < fdev->nr_channels; i++) {
> fchan = &fdev->chans[i];
> list_del(&fchan->vchan.chan.device_node);
> - tasklet_kill(&fchan->vchan.task);
> + cancel_work_sync(&fchan->vchan.work);
> }
> }
> 
> diff --git a/drivers/dma/stm32/stm32-dma.c b/drivers/dma/stm32/stm32-dma.c
> index 917f8e922373..280ea4c32340 100644
> --- a/drivers/dma/stm32/stm32-dma.c
> +++ b/drivers/dma/stm32/stm32-dma.c
> @@ -16,6 +16,7 @@
> #include <linux/dma-mapping.h>
> #include <linux/err.h>
> #include <linux/init.h>
> +#include <linux/interrupt.h>
> #include <linux/iopoll.h>
> #include <linux/jiffies.h>
> #include <linux/list.h>
> diff --git a/drivers/dma/stm32/stm32-dma3.c b/drivers/dma/stm32/stm32-dma3.c
> index 0c6c4258b195..1b2bd9ec8a0a 100644
> --- a/drivers/dma/stm32/stm32-dma3.c
> +++ b/drivers/dma/stm32/stm32-dma3.c
> @@ -12,6 +12,7 @@
> #include <linux/dmaengine.h>
> #include <linux/dmapool.h>
> #include <linux/init.h>
> +#include <linux/interrupt.h>
> #include <linux/iopoll.h>
> #include <linux/list.h>
> #include <linux/module.h>
> diff --git a/drivers/dma/stm32/stm32-mdma.c b/drivers/dma/stm32/stm32-mdma.c
> index e6d525901de7..dc933851b448 100644
> --- a/drivers/dma/stm32/stm32-mdma.c
> +++ b/drivers/dma/stm32/stm32-mdma.c
> @@ -18,6 +18,7 @@
> #include <linux/dmapool.h>
> #include <linux/err.h>
> #include <linux/init.h>
> +#include <linux/interrupt.h>
> #include <linux/iopoll.h>
> #include <linux/jiffies.h>
> #include <linux/list.h>
> diff --git a/drivers/dma/sun6i-dma.c b/drivers/dma/sun6i-dma.c
> index 2215ff877bf7..3f7cb334feb2 100644
> --- a/drivers/dma/sun6i-dma.c
> +++ b/drivers/dma/sun6i-dma.c
> @@ -1073,7 +1073,7 @@ static inline void sun6i_dma_free(struct sun6i_dma_dev *sdev)
> struct sun6i_vchan *vchan = &sdev->vchans[i];
> 
> list_del(&vchan->vc.chan.device_node);
> - tasklet_kill(&vchan->vc.task);
> + cancel_work_sync(&vchan->vc.work);
> }
> }
> 
> diff --git a/drivers/dma/tegra186-gpc-dma.c b/drivers/dma/tegra186-gpc-dma.c
> index 4d6fe0efa76e..9b98966444fa 100644
> --- a/drivers/dma/tegra186-gpc-dma.c
> +++ b/drivers/dma/tegra186-gpc-dma.c
> @@ -1279,7 +1279,7 @@ static void tegra_dma_free_chan_resources(struct dma_chan *dc)
> tegra_dma_terminate_all(dc);
> synchronize_irq(tdc->irq);
> 
> - tasklet_kill(&tdc->vc.task);
> + cancel_work_sync(&tdc->vc.work);
> tdc->config_init = false;
> tdc->slave_id = -1;
> tdc->sid_dir = DMA_TRANS_NONE;
> diff --git a/drivers/dma/tegra210-adma.c b/drivers/dma/tegra210-adma.c
> index fad896ff29a2..13d31458afcf 100644
> --- a/drivers/dma/tegra210-adma.c
> +++ b/drivers/dma/tegra210-adma.c
> @@ -6,6 +6,7 @@
>  */
> 
> #include <linux/clk.h>
> +#include <linux/interrupt.h>
> #include <linux/iopoll.h>
> #include <linux/module.h>
> #include <linux/of.h>
> @@ -793,7 +794,7 @@ static void tegra_adma_free_chan_resources(struct dma_chan *dc)
> 
> tegra_adma_terminate_all(dc);
> vchan_free_chan_resources(&tdc->vc);
> - tasklet_kill(&tdc->vc.task);
> + cancel_work_sync(&tdc->vc.work);
> free_irq(tdc->irq, tdc);
> pm_runtime_put(tdc2dev(tdc));
> 
> diff --git a/drivers/dma/ti/edma.c b/drivers/dma/ti/edma.c
> index 3ed406f08c44..43b59af82753 100644
> --- a/drivers/dma/ti/edma.c
> +++ b/drivers/dma/ti/edma.c
> @@ -2560,7 +2560,7 @@ static void edma_cleanupp_vchan(struct dma_device *dmadev)
> list_for_each_entry_safe(echan, _echan,
> &dmadev->channels, vchan.chan.device_node) {
> list_del(&echan->vchan.chan.device_node);
> - tasklet_kill(&echan->vchan.task);
> + cancel_work_sync(&echan->vchan.work);
> }
> }
> 
> diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
> index aa2dc762140f..d08766e08182 100644
> --- a/drivers/dma/ti/k3-udma.c
> +++ b/drivers/dma/ti/k3-udma.c
> @@ -4042,12 +4042,12 @@ static void udma_desc_pre_callback(struct virt_dma_chan *vc,
> }
> 
> /*
> - * This tasklet handles the completion of a DMA descriptor by
> + * This workqueue handles the completion of a DMA descriptor by
>  * calling its callback and freeing it.
>  */
> -static void udma_vchan_complete(struct tasklet_struct *t)
> +static void udma_vchan_complete(struct work_struct *w)
> {
> - struct virt_dma_chan *vc = from_tasklet(vc, t, task);
> + struct virt_dma_chan *vc = from_work(vc, w, work);
> struct virt_dma_desc *vd, *_vd;
> struct dmaengine_desc_callback cb;
> LIST_HEAD(head);
> @@ -4112,7 +4112,7 @@ static void udma_free_chan_resources(struct dma_chan *chan)
> }
> 
> vchan_free_chan_resources(&uc->vc);
> - tasklet_kill(&uc->vc.task);
> + cancel_work_sync(&uc->vc.work);
> 
> bcdma_free_bchan_resources(uc);
> udma_free_tx_resources(uc);
> @@ -5628,7 +5628,7 @@ static int udma_probe(struct platform_device *pdev)
> return -ENOMEM;
> vchan_init(&uc->vc, &ud->ddev);
> /* Use custom vchan completion handling */
> - tasklet_setup(&uc->vc.task, udma_vchan_complete);
> + INIT_WORK(&uc->vc.work, udma_vchan_complete);
> init_completion(&uc->teardown_completed);
> INIT_DELAYED_WORK(&uc->tx_drain.work, udma_check_tx_completion);
> }
> diff --git a/drivers/dma/ti/omap-dma.c b/drivers/dma/ti/omap-dma.c
> index 8c023c6e623a..ad80cd5e1820 100644
> --- a/drivers/dma/ti/omap-dma.c
> +++ b/drivers/dma/ti/omap-dma.c
> @@ -1521,7 +1521,7 @@ static void omap_dma_free(struct omap_dmadev *od)
> struct omap_chan, vc.chan.device_node);
> 
> list_del(&c->vc.chan.device_node);
> - tasklet_kill(&c->vc.task);
> + cancel_work_sync(&c->vc.work);
> kfree(c);
> }
> }
> diff --git a/drivers/dma/uniphier-xdmac.c b/drivers/dma/uniphier-xdmac.c
> index ceeb6171c9d1..d8b2e819580a 100644
> --- a/drivers/dma/uniphier-xdmac.c
> +++ b/drivers/dma/uniphier-xdmac.c
> @@ -7,6 +7,7 @@
> 
> #include <linux/bitops.h>
> #include <linux/bitfield.h>
> +#include <linux/interrupt.h>
> #include <linux/iopoll.h>
> #include <linux/module.h>
> #include <linux/of.h>
> diff --git a/drivers/dma/virt-dma.c b/drivers/dma/virt-dma.c
> index 7961172a780d..5a4d221e54b8 100644
> --- a/drivers/dma/virt-dma.c
> +++ b/drivers/dma/virt-dma.c
> @@ -77,12 +77,12 @@ struct virt_dma_desc *vchan_find_desc(struct virt_dma_chan *vc,
> EXPORT_SYMBOL_GPL(vchan_find_desc);
> 
> /*
> - * This tasklet handles the completion of a DMA descriptor by
> + * This workqueue handles the completion of a DMA descriptor by
>  * calling its callback and freeing it.
>  */
> -static void vchan_complete(struct tasklet_struct *t)
> +static void vchan_complete(struct work_struct *work)
> {
> - struct virt_dma_chan *vc = from_tasklet(vc, t, task);
> + struct virt_dma_chan *vc = from_work(vc, work, work);
> struct virt_dma_desc *vd, *_vd;
> struct dmaengine_desc_callback cb;
> LIST_HEAD(head);
> @@ -131,7 +131,7 @@ void vchan_init(struct virt_dma_chan *vc, struct dma_device *dmadev)
> INIT_LIST_HEAD(&vc->desc_completed);
> INIT_LIST_HEAD(&vc->desc_terminated);
> 
> - tasklet_setup(&vc->task, vchan_complete);
> + INIT_WORK(&vc->work, vchan_complete);
> 
> vc->chan.device = dmadev;
> list_add_tail(&vc->chan.device_node, &dmadev->channels);
> diff --git a/drivers/dma/virt-dma.h b/drivers/dma/virt-dma.h
> index 59d9eabc8b67..d44ca74d8b7f 100644
> --- a/drivers/dma/virt-dma.h
> +++ b/drivers/dma/virt-dma.h
> @@ -8,7 +8,7 @@
> #define VIRT_DMA_H
> 
> #include <linux/dmaengine.h>
> -#include <linux/interrupt.h>
> +#include <linux/workqueue.h>
> 
> #include "dmaengine.h"
> 
> @@ -21,7 +21,7 @@ struct virt_dma_desc {
> 
> struct virt_dma_chan {
> struct dma_chan chan;
> - struct tasklet_struct task;
> + struct work_struct work;
> void (*desc_free)(struct virt_dma_desc *);
> 
> spinlock_t lock;
> @@ -106,7 +106,7 @@ static inline void vchan_cookie_complete(struct virt_dma_desc *vd)
> vd, cookie);
> list_add_tail(&vd->node, &vc->desc_completed);
> 
> - tasklet_schedule(&vc->task);
> + queue_work(system_bh_wq, &vc->work);
> }
> 
> /**
> @@ -137,7 +137,7 @@ static inline void vchan_cyclic_callback(struct virt_dma_desc *vd)
> struct virt_dma_chan *vc = to_virt_chan(vd->tx.chan);
> 
> vc->cyclic = vd;
> - tasklet_schedule(&vc->task);
> + queue_work(system_bh_wq, &vc->work);
> }
> 
> /**
> @@ -223,7 +223,7 @@ static inline void vchan_synchronize(struct virt_dma_chan *vc)
> LIST_HEAD(head);
> unsigned long flags;
> 
> - tasklet_kill(&vc->task);
> + cancel_work_sync(&vc->work);
> 
> spin_lock_irqsave(&vc->lock, flags);
> 
> -- 
> 2.43.0
>