[PATCH 1/2] mfd: lp8788: Fix an error handling path in lp8788_probe()

[PATCH 1/2] mfd: lp8788: Fix an error handling path in lp8788_probe()

[Christophe JAILLET]

Should an error occurs in mfd_add_devices(), some resources need to be
released, as already done in the .remove() function.

Add an error handling path and a lp8788_irq_exit() call to undo a previous
lp8788_irq_init().

Fixes: eea6b7cc53aa ("mfd: Add lp8788 mfd driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/mfd/lp8788.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/mfd/lp8788.c b/drivers/mfd/lp8788.c
index c223d2c6a363..998e8cc408a0 100644
--- a/drivers/mfd/lp8788.c
+++ b/drivers/mfd/lp8788.c
@@ -195,8 +195,16 @@ static int lp8788_probe(struct i2c_client *cl, const struct i2c_device_id *id)
 	if (ret)
 		return ret;
 
-	return mfd_add_devices(lp->dev, -1, lp8788_devs,
-			       ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
+	ret = mfd_add_devices(lp->dev, -1, lp8788_devs,
+			      ARRAY_SIZE(lp8788_devs), NULL, 0, NULL);
+	if (ret)
+		goto err_exit_irq;
+
+	return 0;
+
+err_exit_irq:
+	lp8788_irq_exit(lp);
+	return ret;
 }
 
 static int lp8788_remove(struct i2c_client *cl)
-- 
2.34.1

[PATCH 2/2] mfd: lp8788: Fix an error handling path in lp8788_irq_init() and lp8788_irq_init()

[Christophe JAILLET]

In lp8788_irq_init(), if an error occurs after a successful
irq_domain_add_linear() call, it must be undone by a corresponding
irq_domain_remove() call.

irq_domain_remove() should also be called in lp8788_irq_exit() for the same
reason.

Fixes: eea6b7cc53aa ("mfd: Add lp8788 mfd driver")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
---
 drivers/mfd/lp8788-irq.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/mfd/lp8788-irq.c b/drivers/mfd/lp8788-irq.c
index 348439a3fbbd..39006297f3d2 100644
--- a/drivers/mfd/lp8788-irq.c
+++ b/drivers/mfd/lp8788-irq.c
@@ -175,6 +175,7 @@ int lp8788_irq_init(struct lp8788 *lp, int irq)
 				IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
 				"lp8788-irq", irqd);
 	if (ret) {
+		irq_domain_remove(lp->irqdm);
 		dev_err(lp->dev, "failed to create a thread for IRQ_N\n");
 		return ret;
 	}
@@ -188,4 +189,6 @@ void lp8788_irq_exit(struct lp8788 *lp)
 {
 	if (lp->irq)
 		free_irq(lp->irq, lp->irqdm);
+	if (lp->irqdm)
+		irq_domain_remove(lp->irqdm);
 }
-- 
2.34.1

Re: [PATCH 2/2] mfd: lp8788: Fix an error handling path in lp8788_irq_init() and lp8788_irq_init()

[Lee Jones]

On Sun, 31 Jul 2022, Christophe JAILLET wrote:

> In lp8788_irq_init(), if an error occurs after a successful
> irq_domain_add_linear() call, it must be undone by a corresponding
> irq_domain_remove() call.
> 
> irq_domain_remove() should also be called in lp8788_irq_exit() for the same
> reason.
> 
> Fixes: eea6b7cc53aa ("mfd: Add lp8788 mfd driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
>  drivers/mfd/lp8788-irq.c | 3 +++
>  1 file changed, 3 insertions(+)

Applied, thanks.

-- 
Lee Jones [李琼斯]

Re: [PATCH 1/2] mfd: lp8788: Fix an error handling path in lp8788_probe()

[Lee Jones]

On Sun, 31 Jul 2022, Christophe JAILLET wrote:

> Should an error occurs in mfd_add_devices(), some resources need to be
> released, as already done in the .remove() function.
> 
> Add an error handling path and a lp8788_irq_exit() call to undo a previous
> lp8788_irq_init().
> 
> Fixes: eea6b7cc53aa ("mfd: Add lp8788 mfd driver")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
>  drivers/mfd/lp8788.c | 12 ++++++++++--
>  1 file changed, 10 insertions(+), 2 deletions(-)

Applied, thanks.

-- 
Lee Jones [李琼斯]