[PATCH net-next v2 1/7] net: ipa: change ipa_interrupt_config() prototype

Alex Elder
2024-03-01T17:02:48Z

Change the return type of ipa_interrupt_config() to be an error
code rather than an IPA interrupt structure pointer, and assign the
the pointer within that function.

Change ipa_interrupt_deconfig() to take the IPA pointer as argument
and have it invalidate the ipa->interrupt pointer.

Signed-off-by: Alex Elder <elder@linaro.org>
---
v2: Make sure all returns from ipa_interrupt_config() are ints.

drivers/net/ipa/ipa_interrupt.c | 25 +++++++++++++++----------
drivers/net/ipa/ipa_interrupt.h | 10 +++++-----
drivers/net/ipa/ipa_main.c | 13 ++++---------
3 files changed, 24 insertions(+), 24 deletions(-)

diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 4d80bf77a5323..e23c9a5942eda 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -236,7 +236,7 @@ void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt)
}

/* Configure the IPA interrupt framework */
-struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa)
+int ipa_interrupt_config(struct ipa *ipa)
{
struct device *dev = &ipa->pdev->dev;
struct ipa_interrupt *interrupt;
@@ -246,15 +246,14 @@ struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa)

ret = platform_get_irq_byname(ipa->pdev, "ipa");
if (ret <= 0) {
- dev_err(dev, "DT error %d getting \"ipa\" IRQ property\n",
- ret);
- return ERR_PTR(ret ? : -EINVAL);
+ dev_err(dev, "DT error %d getting \"ipa\" IRQ property\n", ret);
+ return ret ? : -EINVAL;
}
irq = ret;

interrupt = kzalloc(sizeof(*interrupt), GFP_KERNEL);
if (!interrupt)
- return ERR_PTR(-ENOMEM);
+ return -ENOMEM;
interrupt->ipa = ipa;
interrupt->irq = irq;

@@ -271,24 +270,30 @@ struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa)

ret = dev_pm_set_wake_irq(dev, irq);
if (ret) {
- dev_err(dev, "error %d registering \"ipa\" IRQ as wakeirq\n", ret);
+ dev_err(dev, "error %d registering \"ipa\" IRQ as wakeirq\n",
+ ret);
goto err_free_irq;
}

- return interrupt;
+ ipa->interrupt = interrupt;
+
+ return 0;

err_free_irq:
free_irq(interrupt->irq, interrupt);
err_kfree:
kfree(interrupt);

- return ERR_PTR(ret);
+ return ret;
}

/* Inverse of ipa_interrupt_config() */
-void ipa_interrupt_deconfig(struct ipa_interrupt *interrupt)
+void ipa_interrupt_deconfig(struct ipa *ipa)
{
- struct device *dev = &interrupt->ipa->pdev->dev;
+ struct ipa_interrupt *interrupt = ipa->interrupt;
+ struct device *dev = &ipa->pdev->dev;
+
+ ipa->interrupt = NULL;

dev_pm_clear_wake_irq(dev);
free_irq(interrupt->irq, interrupt);
diff --git a/drivers/net/ipa/ipa_interrupt.h b/drivers/net/ipa/ipa_interrupt.h
index 53e1b71685c75..1947654e3e360 100644
--- a/drivers/net/ipa/ipa_interrupt.h
+++ b/drivers/net/ipa/ipa_interrupt.h
@@ -76,17 +76,17 @@ void ipa_interrupt_irq_enable(struct ipa *ipa);
void ipa_interrupt_irq_disable(struct ipa *ipa);

/**
- * ipa_interrupt_config() - Configure the IPA interrupt framework
+ * ipa_interrupt_config() - Configure IPA interrupts
* @ipa: IPA pointer
*
- * Return: Pointer to IPA SMP2P info, or a pointer-coded error
+ * Return: 0 if successful, or a negative error code
*/
-struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa);
+int ipa_interrupt_config(struct ipa *ipa);

/**
* ipa_interrupt_deconfig() - Inverse of ipa_interrupt_config()
- * @interrupt: IPA interrupt structure
+ * @ipa: IPA pointer
*/
-void ipa_interrupt_deconfig(struct ipa_interrupt *interrupt);
+void ipa_interrupt_deconfig(struct ipa *ipa);

#endif /* _IPA_INTERRUPT_H_ */
diff --git a/drivers/net/ipa/ipa_main.c b/drivers/net/ipa/ipa_main.c
index 00475fd7a2054..0c6e6719d99e3 100644
--- a/drivers/net/ipa/ipa_main.c
+++ b/drivers/net/ipa/ipa_main.c
@@ -542,12 +542,9 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
if (ret)
goto err_hardware_deconfig;

- ipa->interrupt = ipa_interrupt_config(ipa);
- if (IS_ERR(ipa->interrupt)) {
- ret = PTR_ERR(ipa->interrupt);
- ipa->interrupt = NULL;
+ ret = ipa_interrupt_config(ipa);
+ if (ret)
goto err_mem_deconfig;
- }

ipa_uc_config(ipa);

@@ -572,8 +569,7 @@ static int ipa_config(struct ipa *ipa, const struct ipa_data *data)
ipa_endpoint_deconfig(ipa);
err_uc_deconfig:
ipa_uc_deconfig(ipa);
- ipa_interrupt_deconfig(ipa->interrupt);
- ipa->interrupt = NULL;
+ ipa_interrupt_deconfig(ipa);
err_mem_deconfig:
ipa_mem_deconfig(ipa);
err_hardware_deconfig:
@@ -591,8 +587,7 @@ static void ipa_deconfig(struct ipa *ipa)
ipa_modem_deconfig(ipa);
ipa_endpoint_deconfig(ipa);
ipa_uc_deconfig(ipa);
- ipa_interrupt_deconfig(ipa->interrupt);
- ipa->interrupt = NULL;
+ ipa_interrupt_deconfig(ipa);
ipa_mem_deconfig(ipa);
ipa_hardware_deconfig(ipa);
}
--
2.40.1