netdev - [PATCH net-next 1/7] net: ipa: change ipa_interrupt

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Date: Thu, 29 Feb 2024 14:55:48 -0600
From: Alex Elder <elder@...aro.org>
To: davem@...emloft.net,
	edumazet@...gle.com,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: mka@...omium.org,
	andersson@...nel.org,
	quic_cpratapa@...cinc.com,
	quic_avuyyuru@...cinc.com,
	quic_jponduru@...cinc.com,
	quic_subashab@...cinc.com,
	elder@...nel.org,
	netdev@...r.kernel.org,
	linux-arm-msm@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH net-next 1/7] net: ipa: change ipa_interrupt_config() prototype

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@...aro.org>
---
 drivers/net/ipa/ipa_interrupt.c | 15 ++++++++++-----
 drivers/net/ipa/ipa_interrupt.h | 10 +++++-----
 drivers/net/ipa/ipa_main.c      | 13 ++++---------
 3 files changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 4d80bf77a5323..a298d922dd871 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;
@@ -254,10 +254,12 @@ struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa)
 
 	interrupt = kzalloc(sizeof(*interrupt), GFP_KERNEL);
 	if (!interrupt)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 	interrupt->ipa = ipa;
 	interrupt->irq = irq;
 
+	ipa->interrupt = interrupt;
+
 	/* Start with all IPA interrupts disabled */
 	reg = ipa_reg(ipa, IPA_IRQ_EN);
 	iowrite32(0, ipa->reg_virt + reg_offset(reg));
@@ -282,13 +284,16 @@ struct ipa_interrupt *ipa_interrupt_config(struct ipa *ipa)
 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