linux-kernel - [PATCH net-next 5/5] net: ipa: kill ipa_clock

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Message-Id: <20210819221927.3286267-6-elder@linaro.org>
Date:   Thu, 19 Aug 2021 17:19:27 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     bjorn.andersson@...aro.org, evgreen@...omium.org,
        cpratapa@...eaurora.org, subashab@...eaurora.org, elder@...nel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 5/5] net: ipa: kill ipa_clock_get()

The only remaining user of the ipa_clock_{get,put}() interface is
ipa_isr_thread().  Replace calls to ipa_clock_get() there calling
pm_runtime_get_sync() instead.  And call pm_runtime_put() there
rather than ipa_clock_put().  Warn if we ever get an error.

With that, we can get rid of ipa_clock_get() and ipa_clock_put().

Signed-off-by: Alex Elder <elder@...aro.org>
---
 drivers/net/ipa/ipa_clock.c     | 17 -----------------
 drivers/net/ipa/ipa_clock.h     | 24 ------------------------
 drivers/net/ipa/ipa_interrupt.c | 14 +++++++-------
 3 files changed, 7 insertions(+), 48 deletions(-)

diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
index 8f25107c1f1e7..357be73a45834 100644
--- a/drivers/net/ipa/ipa_clock.c
+++ b/drivers/net/ipa/ipa_clock.c
@@ -266,23 +266,6 @@ static int ipa_runtime_idle(struct device *dev)
 	return -EAGAIN;
 }
 
-/* Get an IPA clock reference.  If the reference count is non-zero, it is
- * incremented and return is immediate.  Otherwise the IPA clock is
- * enabled.
- */
-int ipa_clock_get(struct ipa *ipa)
-{
-	return pm_runtime_get_sync(&ipa->pdev->dev);
-}
-
-/* Attempt to remove an IPA clock reference.  If this represents the
- * last reference, disable the IPA clock.
- */
-int ipa_clock_put(struct ipa *ipa)
-{
-	return pm_runtime_put(&ipa->pdev->dev);
-}
-
 static int ipa_suspend(struct device *dev)
 {
 	struct ipa *ipa = dev_get_drvdata(dev);
diff --git a/drivers/net/ipa/ipa_clock.h b/drivers/net/ipa/ipa_clock.h
index 5c53241336a1a..8c21a007c4375 100644
--- a/drivers/net/ipa/ipa_clock.h
+++ b/drivers/net/ipa/ipa_clock.h
@@ -52,28 +52,4 @@ struct ipa_clock *ipa_clock_init(struct device *dev,
  */
 void ipa_clock_exit(struct ipa_clock *clock);
 
-/**
- * ipa_clock_get() - Get an IPA clock reference
- * @ipa:	IPA pointer
- *
- * Return:	0 if clock started, 1 if clock already running, or a negative
- *		error code
- *
- * This call blocks if this is the first reference.  A reference is
- * taken even if an error occurs starting the IPA clock.
- */
-int ipa_clock_get(struct ipa *ipa);
-
-/**
- * ipa_clock_put() - Drop an IPA clock reference
- * @ipa:	IPA pointer
- *
- * Return:	0 if successful, or a negative error code
- *
- * This drops a clock reference.  If the last reference is being dropped,
- * the clock is stopped and RX endpoints are suspended.  This call will
- * not block unless the last reference is dropped.
- */
-int ipa_clock_put(struct ipa *ipa);
-
 #endif /* _IPA_CLOCK_H_ */
diff --git a/drivers/net/ipa/ipa_interrupt.c b/drivers/net/ipa/ipa_interrupt.c
index 934c14e066a0a..3fecaadb4a37e 100644
--- a/drivers/net/ipa/ipa_interrupt.c
+++ b/drivers/net/ipa/ipa_interrupt.c
@@ -21,9 +21,9 @@
 
 #include <linux/types.h>
 #include <linux/interrupt.h>
+#include <linux/pm_runtime.h>
 
 #include "ipa.h"
-#include "ipa_clock.h"
 #include "ipa_reg.h"
 #include "ipa_endpoint.h"
 #include "ipa_interrupt.h"
@@ -80,14 +80,16 @@ static irqreturn_t ipa_isr_thread(int irq, void *dev_id)
 	struct ipa_interrupt *interrupt = dev_id;
 	struct ipa *ipa = interrupt->ipa;
 	u32 enabled = interrupt->enabled;
+	struct device *dev;
 	u32 pending;
 	u32 offset;
 	u32 mask;
 	int ret;
 
-	ret = ipa_clock_get(ipa);
+	dev = &ipa->pdev->dev;
+	ret = pm_runtime_get_sync(dev);
 	if (WARN_ON(ret < 0))
-		goto out_clock_put;
+		goto out_power_put;
 
 	/* The status register indicates which conditions are present,
 	 * including conditions whose interrupt is not enabled.  Handle
@@ -108,15 +110,13 @@ static irqreturn_t ipa_isr_thread(int irq, void *dev_id)
 
 	/* If any disabled interrupts are pending, clear them */
 	if (pending) {
-		struct device *dev = &ipa->pdev->dev;
-
 		dev_dbg(dev, "clearing disabled IPA interrupts 0x%08x\n",
 			pending);
 		offset = ipa_reg_irq_clr_offset(ipa->version);
 		iowrite32(pending, ipa->reg_virt + offset);
 	}
-out_clock_put:
-	(void)ipa_clock_put(ipa);
+out_power_put:
+	(void)pm_runtime_put(dev);
 
 	return IRQ_HANDLED;
 }
-- 
2.27.0