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From: Alex Elder <elder@linaro.org>
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Subject: [PATCH net-next v2 1/7] net: ipa: change ipa_interrupt_config() prototype
Date: Fri,  1 Mar 2024 11:02:36 -0600
Message-Id: <20240301170242.243703-2-elder@linaro.org>
In-Reply-To: <20240301170242.243703-1-elder@linaro.org>
References: <20240301170242.243703-1-elder@linaro.org>
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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