[PATCHv2 0/2] dmaengine: fsl_raid: fix resource leaks and simplify drvdata handling

[PATCHv2 0/2] dmaengine: fsl_raid: fix resource leaks and simplify drvdata handling

[Rosen Penev]

This series fixes resource leaks in the FSL RAIDEngine driver and
simplifies drvdata handling:

1) Replace dev_get_drvdata/dev_set_drvdata with platform_get_drvdata/
   platform_set_drvdata, since a platform_device is always used. This
   avoids taking a pointer to a platform device member.

2) Add missing free_irq() in error unwind of fsl_re_chan_probe() and in
   fsl_re_remove_chan(). Also add tasklet_kill() and
   of_platform_device_destroy() to properly release all resources.

v2: split into two patches

Rosen Penev (2):
  dmaengine: fsl_raid: pass platform_device to drvdata
  dmaengine: fsl_raid: free resources in probe

 drivers/dma/fsl_raid.c | 33 ++++++++++++++++++++-------------
 drivers/dma/fsl_raid.h |  1 +
 2 files changed, 21 insertions(+), 13 deletions(-)

-- 
2.55.0

[PATCHv2 1/2] dmaengine: fsl_raid: pass platform_device to drvdata

[Rosen Penev]

Simplifies code slightly and avoids having to take pointer of a platform
device member. A platform device is always used.

Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/dma/fsl_raid.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
index da5228e121d1..2d54879cd6e1 100644
--- a/drivers/dma/fsl_raid.c
+++ b/drivers/dma/fsl_raid.c
@@ -219,10 +219,11 @@ static void fsl_re_dequeue(struct tasklet_struct *t)
 /* Per Job Ring interrupt handler */
 static irqreturn_t fsl_re_isr(int irq, void *data)
 {
+	struct platform_device *pdev = data;
 	struct fsl_re_chan *re_chan;
 	u32 irqstate, status;
 
-	re_chan = dev_get_drvdata((struct device *)data);
+	re_chan = platform_get_drvdata(pdev);
 
 	irqstate = in_be32(&re_chan->jrregs->jr_interrupt_status);
 	if (!irqstate)
@@ -649,7 +650,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	struct platform_device *chan_ofdev;
 
 	dev = &ofdev->dev;
-	re_priv = dev_get_drvdata(dev);
+	re_priv = platform_get_drvdata(ofdev);
 	dma_dev = &re_priv->dma_dev;
 
 	chan = devm_kzalloc(dev, sizeof(*chan), GFP_KERNEL);
@@ -687,7 +688,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	chandev = &chan_ofdev->dev;
 	tasklet_setup(&chan->irqtask, fsl_re_dequeue);
 
-	ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chandev);
+	ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chan_ofdev);
 	if (ret) {
 		dev_err(dev, "Unable to register interrupt for JR %d\n", q);
 		ret = -EINVAL;
@@ -743,7 +744,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	out_be32(&chan->jrregs->jr_config_1,
 		 FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
 
-	dev_set_drvdata(chandev, chan);
+	platform_set_drvdata(chan_ofdev, chan);
 
 	/* Enable RE/CHAN */
 	out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
@@ -834,7 +835,7 @@ static int fsl_re_probe(struct platform_device *ofdev)
 		return -ENOMEM;
 	}
 
-	dev_set_drvdata(dev, re_priv);
+	platform_set_drvdata(ofdev, re_priv);
 
 	/* Parse Device tree to find out the total number of JQs present */
 	for_each_compatible_node_scoped(np, NULL, "fsl,raideng-v1.0-job-queue") {
@@ -903,11 +904,9 @@ static void fsl_re_remove_chan(struct fsl_re_chan *chan)
 static void fsl_re_remove(struct platform_device *ofdev)
 {
 	struct fsl_re_drv_private *re_priv;
-	struct device *dev;
 	int i;
 
-	dev = &ofdev->dev;
-	re_priv = dev_get_drvdata(dev);
+	re_priv = platform_get_drvdata(ofdev);
 
 	/* Unregister the DMA device first so no client can still hold a
 	 * channel and submit new work while the channel rings are torn
-- 
2.55.0

[PATCHv2 2/2] dmaengine: fsl_raid: free resources in probe

[Rosen Penev]

Add free_irq() in the error unwind of fsl_re_chan_probe() and in
fsl_re_remove_chan() so the interrupt is always released.

Also add tasklet_kill(). Present in _remove but not _probe.

Also add platform_device_put on failure as of_platform_device_create()
increases the reference count and needs platform_device_put on failure.
Requires placing the pointer in the struct for the _remove function.
While at it, use platform_get/set_drvdata as there's no need for using a
device pointer for that.

Fixes: ad80da658bbc ("dmaengine: Driver support for FSL RaidEngine device.")
Assisted-by: opencode:hy3-free
Signed-off-by: Rosen Penev <rosenp@gmail.com>
---
 drivers/dma/fsl_raid.c | 20 ++++++++++++++------
 drivers/dma/fsl_raid.h |  1 +
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
index 2d54879cd6e1..cabc79e61e85 100644
--- a/drivers/dma/fsl_raid.c
+++ b/drivers/dma/fsl_raid.c
@@ -661,8 +661,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	chan_ofdev = of_platform_device_create(np, NULL, dev);
 	if (!chan_ofdev) {
 		dev_err(dev, "Not able to create ofdev for jr %d\n", q);
-		ret = -EINVAL;
-		goto err_free;
+		return -EINVAL;
 	}
 
 	/* read reg property from dts */
@@ -688,17 +687,19 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	chandev = &chan_ofdev->dev;
 	tasklet_setup(&chan->irqtask, fsl_re_dequeue);
 
+	platform_set_drvdata(chan_ofdev, chan);
 	ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chan_ofdev);
 	if (ret) {
 		dev_err(dev, "Unable to register interrupt for JR %d\n", q);
 		ret = -EINVAL;
-		goto err_free;
+		goto err_free_tasklet;
 	}
 
 	re_priv->re_jrs[q] = chan;
 	chan->chan.device = dma_dev;
 	chan->chan.private = chan;
 	chan->dev = chandev;
+	chan->ofdev = chan_ofdev;
 	chan->re_dev = re_priv;
 
 	spin_lock_init(&chan->desc_lock);
@@ -712,7 +713,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	if (!chan->inb_ring_virt_addr) {
 		dev_err(dev, "No dma memory for inb_ring_virt_addr\n");
 		ret = -ENOMEM;
-		goto err_free;
+		goto err_free_irq;
 	}
 
 	chan->oub_ring_virt_addr = dma_pool_alloc(chan->re_dev->hw_desc_pool,
@@ -744,8 +745,6 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 	out_be32(&chan->jrregs->jr_config_1,
 		 FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
 
-	platform_set_drvdata(chan_ofdev, chan);
-
 	/* Enable RE/CHAN */
 	out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
 
@@ -754,7 +753,12 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
 err_free_1:
 	dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
 		      chan->inb_phys_addr);
+err_free_irq:
+	free_irq(chan->irq, chan_ofdev);
+err_free_tasklet:
+	tasklet_kill(&chan->irqtask);
 err_free:
+	of_platform_device_destroy(chan_ofdev);
 	return ret;
 }
 
@@ -892,6 +896,8 @@ static int fsl_re_probe(struct platform_device *ofdev)
 
 static void fsl_re_remove_chan(struct fsl_re_chan *chan)
 {
+	free_irq(chan->irq, chan->ofdev);
+
 	tasklet_kill(&chan->irqtask);
 
 	dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
@@ -899,6 +905,8 @@ static void fsl_re_remove_chan(struct fsl_re_chan *chan)
 
 	dma_pool_free(chan->re_dev->hw_desc_pool, chan->oub_ring_virt_addr,
 		      chan->oub_phys_addr);
+
+	of_platform_device_destroy(chan->ofdev);
 }
 
 static void fsl_re_remove(struct platform_device *ofdev)
diff --git a/drivers/dma/fsl_raid.h b/drivers/dma/fsl_raid.h
index adbfede330a7..34d362803610 100644
--- a/drivers/dma/fsl_raid.h
+++ b/drivers/dma/fsl_raid.h
@@ -270,6 +270,7 @@ struct fsl_re_chan {
 	struct list_head active_q; /* already issued on hw, not completed */
 	struct list_head submit_q;
 	struct list_head free_q; /* alloc available queue */
+	struct platform_device *ofdev;
 	struct device *dev;
 	struct fsl_re_drv_private *re_dev;
 	struct dma_chan chan;
-- 
2.55.0

Re: [PATCHv2 1/2] dmaengine: fsl_raid: pass platform_device to drvdata

[Frank Li]

On Tue, Jul 21, 2026 at 12:54:21PM -0700, Rosen Penev wrote:
> Simplifies code slightly and avoids having to take pointer of a platform
> device member. A platform device is always used.
>
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---

Reviewed-by: Frank Li <Frank.Li@nxp.com>

>  drivers/dma/fsl_raid.c | 15 +++++++--------
>  1 file changed, 7 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
> index da5228e121d1..2d54879cd6e1 100644
> --- a/drivers/dma/fsl_raid.c
> +++ b/drivers/dma/fsl_raid.c
> @@ -219,10 +219,11 @@ static void fsl_re_dequeue(struct tasklet_struct *t)
>  /* Per Job Ring interrupt handler */
>  static irqreturn_t fsl_re_isr(int irq, void *data)
>  {
> +	struct platform_device *pdev = data;
>  	struct fsl_re_chan *re_chan;
>  	u32 irqstate, status;
>
> -	re_chan = dev_get_drvdata((struct device *)data);
> +	re_chan = platform_get_drvdata(pdev);
>
>  	irqstate = in_be32(&re_chan->jrregs->jr_interrupt_status);
>  	if (!irqstate)
> @@ -649,7 +650,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	struct platform_device *chan_ofdev;
>
>  	dev = &ofdev->dev;
> -	re_priv = dev_get_drvdata(dev);
> +	re_priv = platform_get_drvdata(ofdev);
>  	dma_dev = &re_priv->dma_dev;
>
>  	chan = devm_kzalloc(dev, sizeof(*chan), GFP_KERNEL);
> @@ -687,7 +688,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	chandev = &chan_ofdev->dev;
>  	tasklet_setup(&chan->irqtask, fsl_re_dequeue);
>
> -	ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chandev);
> +	ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chan_ofdev);
>  	if (ret) {
>  		dev_err(dev, "Unable to register interrupt for JR %d\n", q);
>  		ret = -EINVAL;
> @@ -743,7 +744,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	out_be32(&chan->jrregs->jr_config_1,
>  		 FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
>
> -	dev_set_drvdata(chandev, chan);
> +	platform_set_drvdata(chan_ofdev, chan);
>
>  	/* Enable RE/CHAN */
>  	out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
> @@ -834,7 +835,7 @@ static int fsl_re_probe(struct platform_device *ofdev)
>  		return -ENOMEM;
>  	}
>
> -	dev_set_drvdata(dev, re_priv);
> +	platform_set_drvdata(ofdev, re_priv);
>
>  	/* Parse Device tree to find out the total number of JQs present */
>  	for_each_compatible_node_scoped(np, NULL, "fsl,raideng-v1.0-job-queue") {
> @@ -903,11 +904,9 @@ static void fsl_re_remove_chan(struct fsl_re_chan *chan)
>  static void fsl_re_remove(struct platform_device *ofdev)
>  {
>  	struct fsl_re_drv_private *re_priv;
> -	struct device *dev;
>  	int i;
>
> -	dev = &ofdev->dev;
> -	re_priv = dev_get_drvdata(dev);
> +	re_priv = platform_get_drvdata(ofdev);
>
>  	/* Unregister the DMA device first so no client can still hold a
>  	 * channel and submit new work while the channel rings are torn
> --
> 2.55.0
>

Re: [PATCHv2 2/2] dmaengine: fsl_raid: free resources in probe

[Frank Li]

On Tue, Jul 21, 2026 at 12:54:22PM -0700, Rosen Penev wrote:
> Add free_irq() in the error unwind of fsl_re_chan_probe() and in
> fsl_re_remove_chan() so the interrupt is always released.
>
> Also add tasklet_kill(). Present in _remove but not _probe.
>
> Also add platform_device_put on failure as of_platform_device_create()
> increases the reference count and needs platform_device_put on failure.
> Requires placing the pointer in the struct for the _remove function.
> While at it, use platform_get/set_drvdata as there's no need for using a
> device pointer for that.
>
> Fixes: ad80da658bbc ("dmaengine: Driver support for FSL RaidEngine device.")
> Assisted-by: opencode:hy3-free
> Signed-off-by: Rosen Penev <rosenp@gmail.com>
> ---
>  drivers/dma/fsl_raid.c | 20 ++++++++++++++------
>  drivers/dma/fsl_raid.h |  1 +
>  2 files changed, 15 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
> index 2d54879cd6e1..cabc79e61e85 100644
> --- a/drivers/dma/fsl_raid.c
> +++ b/drivers/dma/fsl_raid.c
> @@ -661,8 +661,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	chan_ofdev = of_platform_device_create(np, NULL, dev);
>  	if (!chan_ofdev) {
>  		dev_err(dev, "Not able to create ofdev for jr %d\n", q);
> -		ret = -EINVAL;
> -		goto err_free;
> +		return -EINVAL;
>  	}
>
>  	/* read reg property from dts */
> @@ -688,17 +687,19 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	chandev = &chan_ofdev->dev;
>  	tasklet_setup(&chan->irqtask, fsl_re_dequeue);
>
> +	platform_set_drvdata(chan_ofdev, chan);

Previous patch already set, why need set again?

Frank
>  	ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chan_ofdev);
>  	if (ret) {
>  		dev_err(dev, "Unable to register interrupt for JR %d\n", q);
>  		ret = -EINVAL;
> -		goto err_free;
> +		goto err_free_tasklet;
>  	}
>
>  	re_priv->re_jrs[q] = chan;
>  	chan->chan.device = dma_dev;
>  	chan->chan.private = chan;
>  	chan->dev = chandev;
> +	chan->ofdev = chan_ofdev;
>  	chan->re_dev = re_priv;
>
>  	spin_lock_init(&chan->desc_lock);
> @@ -712,7 +713,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	if (!chan->inb_ring_virt_addr) {
>  		dev_err(dev, "No dma memory for inb_ring_virt_addr\n");
>  		ret = -ENOMEM;
> -		goto err_free;
> +		goto err_free_irq;
>  	}
>
>  	chan->oub_ring_virt_addr = dma_pool_alloc(chan->re_dev->hw_desc_pool,
> @@ -744,8 +745,6 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  	out_be32(&chan->jrregs->jr_config_1,
>  		 FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
>
> -	platform_set_drvdata(chan_ofdev, chan);
> -
>  	/* Enable RE/CHAN */
>  	out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
>
> @@ -754,7 +753,12 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
>  err_free_1:
>  	dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
>  		      chan->inb_phys_addr);
> +err_free_irq:
> +	free_irq(chan->irq, chan_ofdev);
> +err_free_tasklet:
> +	tasklet_kill(&chan->irqtask);
>  err_free:
> +	of_platform_device_destroy(chan_ofdev);
>  	return ret;
>  }
>
> @@ -892,6 +896,8 @@ static int fsl_re_probe(struct platform_device *ofdev)
>
>  static void fsl_re_remove_chan(struct fsl_re_chan *chan)
>  {
> +	free_irq(chan->irq, chan->ofdev);
> +
>  	tasklet_kill(&chan->irqtask);
>
>  	dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
> @@ -899,6 +905,8 @@ static void fsl_re_remove_chan(struct fsl_re_chan *chan)
>
>  	dma_pool_free(chan->re_dev->hw_desc_pool, chan->oub_ring_virt_addr,
>  		      chan->oub_phys_addr);
> +
> +	of_platform_device_destroy(chan->ofdev);
>  }
>
>  static void fsl_re_remove(struct platform_device *ofdev)
> diff --git a/drivers/dma/fsl_raid.h b/drivers/dma/fsl_raid.h
> index adbfede330a7..34d362803610 100644
> --- a/drivers/dma/fsl_raid.h
> +++ b/drivers/dma/fsl_raid.h
> @@ -270,6 +270,7 @@ struct fsl_re_chan {
>  	struct list_head active_q; /* already issued on hw, not completed */
>  	struct list_head submit_q;
>  	struct list_head free_q; /* alloc available queue */
> +	struct platform_device *ofdev;
>  	struct device *dev;
>  	struct fsl_re_drv_private *re_dev;
>  	struct dma_chan chan;
> --
> 2.55.0
>

Re: [PATCHv2 2/2] dmaengine: fsl_raid: free resources in probe

[Rosen Penev]

On Tue, Jul 21, 2026 at 2:43 PM Frank Li <Frank.li@oss.nxp.com> wrote:
>
> On Tue, Jul 21, 2026 at 12:54:22PM -0700, Rosen Penev wrote:
> > Add free_irq() in the error unwind of fsl_re_chan_probe() and in
> > fsl_re_remove_chan() so the interrupt is always released.
> >
> > Also add tasklet_kill(). Present in _remove but not _probe.
> >
> > Also add platform_device_put on failure as of_platform_device_create()
> > increases the reference count and needs platform_device_put on failure.
> > Requires placing the pointer in the struct for the _remove function.
> > While at it, use platform_get/set_drvdata as there's no need for using a
> > device pointer for that.
> >
> > Fixes: ad80da658bbc ("dmaengine: Driver support for FSL RaidEngine device.")
> > Assisted-by: opencode:hy3-free
> > Signed-off-by: Rosen Penev <rosenp@gmail.com>
> > ---
> >  drivers/dma/fsl_raid.c | 20 ++++++++++++++------
> >  drivers/dma/fsl_raid.h |  1 +
> >  2 files changed, 15 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
> > index 2d54879cd6e1..cabc79e61e85 100644
> > --- a/drivers/dma/fsl_raid.c
> > +++ b/drivers/dma/fsl_raid.c
> > @@ -661,8 +661,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> >       chan_ofdev = of_platform_device_create(np, NULL, dev);
> >       if (!chan_ofdev) {
> >               dev_err(dev, "Not able to create ofdev for jr %d\n", q);
> > -             ret = -EINVAL;
> > -             goto err_free;
> > +             return -EINVAL;
> >       }
> >
> >       /* read reg property from dts */
> > @@ -688,17 +687,19 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> >       chandev = &chan_ofdev->dev;
> >       tasklet_setup(&chan->irqtask, fsl_re_dequeue);
> >
> > +     platform_set_drvdata(chan_ofdev, chan);
>
> Previous patch already set, why need set again?
This is because request_irq uses platform_get_drvdata.

On further review, I think chan should be passed directly.
>
> Frank
> >       ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chan_ofdev);
> >       if (ret) {
> >               dev_err(dev, "Unable to register interrupt for JR %d\n", q);
> >               ret = -EINVAL;
> > -             goto err_free;
> > +             goto err_free_tasklet;
> >       }
> >
> >       re_priv->re_jrs[q] = chan;
> >       chan->chan.device = dma_dev;
> >       chan->chan.private = chan;
> >       chan->dev = chandev;
> > +     chan->ofdev = chan_ofdev;
> >       chan->re_dev = re_priv;
> >
> >       spin_lock_init(&chan->desc_lock);
> > @@ -712,7 +713,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> >       if (!chan->inb_ring_virt_addr) {
> >               dev_err(dev, "No dma memory for inb_ring_virt_addr\n");
> >               ret = -ENOMEM;
> > -             goto err_free;
> > +             goto err_free_irq;
> >       }
> >
> >       chan->oub_ring_virt_addr = dma_pool_alloc(chan->re_dev->hw_desc_pool,
> > @@ -744,8 +745,6 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> >       out_be32(&chan->jrregs->jr_config_1,
> >                FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
> >
> > -     platform_set_drvdata(chan_ofdev, chan);
> > -
> >       /* Enable RE/CHAN */
> >       out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
> >
> > @@ -754,7 +753,12 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> >  err_free_1:
> >       dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
> >                     chan->inb_phys_addr);
> > +err_free_irq:
> > +     free_irq(chan->irq, chan_ofdev);
> > +err_free_tasklet:
> > +     tasklet_kill(&chan->irqtask);
> >  err_free:
> > +     of_platform_device_destroy(chan_ofdev);
> >       return ret;
> >  }
> >
> > @@ -892,6 +896,8 @@ static int fsl_re_probe(struct platform_device *ofdev)
> >
> >  static void fsl_re_remove_chan(struct fsl_re_chan *chan)
> >  {
> > +     free_irq(chan->irq, chan->ofdev);
> > +
> >       tasklet_kill(&chan->irqtask);
> >
> >       dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
> > @@ -899,6 +905,8 @@ static void fsl_re_remove_chan(struct fsl_re_chan *chan)
> >
> >       dma_pool_free(chan->re_dev->hw_desc_pool, chan->oub_ring_virt_addr,
> >                     chan->oub_phys_addr);
> > +
> > +     of_platform_device_destroy(chan->ofdev);
> >  }
> >
> >  static void fsl_re_remove(struct platform_device *ofdev)
> > diff --git a/drivers/dma/fsl_raid.h b/drivers/dma/fsl_raid.h
> > index adbfede330a7..34d362803610 100644
> > --- a/drivers/dma/fsl_raid.h
> > +++ b/drivers/dma/fsl_raid.h
> > @@ -270,6 +270,7 @@ struct fsl_re_chan {
> >       struct list_head active_q; /* already issued on hw, not completed */
> >       struct list_head submit_q;
> >       struct list_head free_q; /* alloc available queue */
> > +     struct platform_device *ofdev;
> >       struct device *dev;
> >       struct fsl_re_drv_private *re_dev;
> >       struct dma_chan chan;
> > --
> > 2.55.0
> >

Re: [PATCHv2 2/2] dmaengine: fsl_raid: free resources in probe

[Frank Li]

On Tue, Jul 21, 2026 at 02:53:17PM -0700, Rosen Penev wrote:
> On Tue, Jul 21, 2026 at 2:43 PM Frank Li <Frank.li@oss.nxp.com> wrote:
> >
> > On Tue, Jul 21, 2026 at 12:54:22PM -0700, Rosen Penev wrote:
> > > Add free_irq() in the error unwind of fsl_re_chan_probe() and in
> > > fsl_re_remove_chan() so the interrupt is always released.
> > >
> > > Also add tasklet_kill(). Present in _remove but not _probe.
> > >
> > > Also add platform_device_put on failure as of_platform_device_create()

platform_device_put()

> > > increases the reference count and needs platform_device_put on failure.
> > > Requires placing the pointer in the struct for the _remove function.
> > > While at it, use platform_get/set_drvdata as there's no need for using a
> > > device pointer for that.

Needn't "While at ..."

> > >
> > > Fixes: ad80da658bbc ("dmaengine: Driver support for FSL RaidEngine device.")
> > > Assisted-by: opencode:hy3-free
> > > Signed-off-by: Rosen Penev <rosenp@gmail.com>
> > > ---
> > >  drivers/dma/fsl_raid.c | 20 ++++++++++++++------
> > >  drivers/dma/fsl_raid.h |  1 +
> > >  2 files changed, 15 insertions(+), 6 deletions(-)
> > >
> > > diff --git a/drivers/dma/fsl_raid.c b/drivers/dma/fsl_raid.c
> > > index 2d54879cd6e1..cabc79e61e85 100644
> > > --- a/drivers/dma/fsl_raid.c
> > > +++ b/drivers/dma/fsl_raid.c
> > > @@ -661,8 +661,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> > >       chan_ofdev = of_platform_device_create(np, NULL, dev);
> > >       if (!chan_ofdev) {
> > >               dev_err(dev, "Not able to create ofdev for jr %d\n", q);
> > > -             ret = -EINVAL;
> > > -             goto err_free;
> > > +             return -EINVAL;
> > >       }
> > >
> > >       /* read reg property from dts */
> > > @@ -688,17 +687,19 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> > >       chandev = &chan_ofdev->dev;
> > >       tasklet_setup(&chan->irqtask, fsl_re_dequeue);
> > >
> > > +     platform_set_drvdata(chan_ofdev, chan);
> >
> > Previous patch already set, why need set again?
> This is because request_irq uses platform_get_drvdata.
>
> On further review, I think chan should be passed directly.

Yes

Frank
> >
> > Frank
> > >       ret = request_irq(chan->irq, fsl_re_isr, 0, chan->name, chan_ofdev);
> > >       if (ret) {
> > >               dev_err(dev, "Unable to register interrupt for JR %d\n", q);
> > >               ret = -EINVAL;
> > > -             goto err_free;
> > > +             goto err_free_tasklet;
> > >       }
> > >
> > >       re_priv->re_jrs[q] = chan;
> > >       chan->chan.device = dma_dev;
> > >       chan->chan.private = chan;
> > >       chan->dev = chandev;
> > > +     chan->ofdev = chan_ofdev;
> > >       chan->re_dev = re_priv;
> > >
> > >       spin_lock_init(&chan->desc_lock);
> > > @@ -712,7 +713,7 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> > >       if (!chan->inb_ring_virt_addr) {
> > >               dev_err(dev, "No dma memory for inb_ring_virt_addr\n");
> > >               ret = -ENOMEM;
> > > -             goto err_free;
> > > +             goto err_free_irq;
> > >       }
> > >
> > >       chan->oub_ring_virt_addr = dma_pool_alloc(chan->re_dev->hw_desc_pool,
> > > @@ -744,8 +745,6 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> > >       out_be32(&chan->jrregs->jr_config_1,
> > >                FSL_RE_CFG1_CBSI | FSL_RE_CFG1_CBS0 | status);
> > >
> > > -     platform_set_drvdata(chan_ofdev, chan);
> > > -
> > >       /* Enable RE/CHAN */
> > >       out_be32(&chan->jrregs->jr_command, FSL_RE_ENABLE);
> > >
> > > @@ -754,7 +753,12 @@ static int fsl_re_chan_probe(struct platform_device *ofdev,
> > >  err_free_1:
> > >       dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
> > >                     chan->inb_phys_addr);
> > > +err_free_irq:
> > > +     free_irq(chan->irq, chan_ofdev);
> > > +err_free_tasklet:
> > > +     tasklet_kill(&chan->irqtask);
> > >  err_free:
> > > +     of_platform_device_destroy(chan_ofdev);
> > >       return ret;
> > >  }
> > >
> > > @@ -892,6 +896,8 @@ static int fsl_re_probe(struct platform_device *ofdev)
> > >
> > >  static void fsl_re_remove_chan(struct fsl_re_chan *chan)
> > >  {
> > > +     free_irq(chan->irq, chan->ofdev);
> > > +
> > >       tasklet_kill(&chan->irqtask);
> > >
> > >       dma_pool_free(chan->re_dev->hw_desc_pool, chan->inb_ring_virt_addr,
> > > @@ -899,6 +905,8 @@ static void fsl_re_remove_chan(struct fsl_re_chan *chan)
> > >
> > >       dma_pool_free(chan->re_dev->hw_desc_pool, chan->oub_ring_virt_addr,
> > >                     chan->oub_phys_addr);
> > > +
> > > +     of_platform_device_destroy(chan->ofdev);
> > >  }
> > >
> > >  static void fsl_re_remove(struct platform_device *ofdev)
> > > diff --git a/drivers/dma/fsl_raid.h b/drivers/dma/fsl_raid.h
> > > index adbfede330a7..34d362803610 100644
> > > --- a/drivers/dma/fsl_raid.h
> > > +++ b/drivers/dma/fsl_raid.h
> > > @@ -270,6 +270,7 @@ struct fsl_re_chan {
> > >       struct list_head active_q; /* already issued on hw, not completed */
> > >       struct list_head submit_q;
> > >       struct list_head free_q; /* alloc available queue */
> > > +     struct platform_device *ofdev;
> > >       struct device *dev;
> > >       struct fsl_re_drv_private *re_dev;
> > >       struct dma_chan chan;
> > > --
> > > 2.55.0
> > >