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@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ipa/ipa_clock.c

@@ -272,23 +272,6 @@ 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);

drivers/net/ipa/ipa_clock.h

@@ -70,28 +70,4 @@ 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_ */

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;
 }