rt2x00: convert rt2x00_rf_read return type

This is a semi-automated conversion to change rt2x00_rf_read()
to return the register contents instead of passing them by value,
resulting in much better object code. The majority of the patch
was done using:

sed -i 's:\(\<rt2x00_rf_read\>(.*, .*\), &\(.*\));:\2 = \1);:' \
	drivers/net/wireless/ralink/rt2x00/rt*
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ralink/rt2x00/rt2400pci.c

@@ -199,7 +199,7 @@ static const struct rt2x00debug rt2400pci_rt2x00debug = {
 		.word_count	= BBP_SIZE / sizeof(u8),
 	},
 	.rf	= {
-		.read		= _rt2x00_rf_read,
+		.read		= rt2x00_rf_read,
 		.write		= rt2400pci_rf_write,
 		.word_base	= RF_BASE,
 		.word_size	= sizeof(u32),

drivers/net/wireless/ralink/rt2x00/rt2500pci.c

@@ -199,7 +199,7 @@ static const struct rt2x00debug rt2500pci_rt2x00debug = {
 		.word_count	= BBP_SIZE / sizeof(u8),
 	},
 	.rf	= {
-		.read		= _rt2x00_rf_read,
+		.read		= rt2x00_rf_read,
 		.write		= rt2500pci_rf_write,
 		.word_base	= RF_BASE,
 		.word_size	= sizeof(u32),
@@ -556,7 +556,7 @@ static void rt2500pci_config_txpower(struct rt2x00_dev *rt2x00dev,
 {
 	u32 rf3;
 
-	rt2x00_rf_read(rt2x00dev, 3, &rf3);
+	rf3 = rt2x00_rf_read(rt2x00dev, 3);
 	rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 	rt2500pci_rf_write(rt2x00dev, 3, rf3);
 }

drivers/net/wireless/ralink/rt2x00/rt2500usb.c

@@ -268,7 +268,7 @@ static const struct rt2x00debug rt2500usb_rt2x00debug = {
 		.word_count	= BBP_SIZE / sizeof(u8),
 	},
 	.rf	= {
-		.read		= _rt2x00_rf_read,
+		.read		= rt2x00_rf_read,
 		.write		= rt2500usb_rf_write,
 		.word_base	= RF_BASE,
 		.word_size	= sizeof(u32),
@@ -639,7 +639,7 @@ static void rt2500usb_config_txpower(struct rt2x00_dev *rt2x00dev,
 {
 	u32 rf3;
 
-	rt2x00_rf_read(rt2x00dev, 3, &rf3);
+	rf3 = rt2x00_rf_read(rt2x00dev, 3);
 	rt2x00_set_field32(&rf3, RF3_TXPOWER, TXPOWER_TO_DEV(txpower));
 	rt2500usb_rf_write(rt2x00dev, 3, rf3);
 }

drivers/net/wireless/ralink/rt2x00/rt2800lib.c

@@ -1265,7 +1265,7 @@ const struct rt2x00debug rt2800_rt2x00debug = {
 		.word_count	= BBP_SIZE / sizeof(u8),
 	},
 	.rf	= {
-		.read		= _rt2x00_rf_read,
+		.read		= rt2x00_rf_read,
 		.write		= rt2800_rf_write,
 		.word_base	= RF_BASE,
 		.word_size	= sizeof(u32),

drivers/net/wireless/ralink/rt2x00/rt2x00.h

@@ -1049,14 +1049,7 @@ struct rt2x00_bar_list_entry {
  * Generic RF access.
  * The RF is being accessed by word index.
  */
-static inline void rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
-				  const unsigned int word, u32 *data)
-{
-	BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));
-	*data = rt2x00dev->rf[word - 1];
-}
-
-static inline u32 _rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
+static inline u32 rt2x00_rf_read(struct rt2x00_dev *rt2x00dev,
 				 const unsigned int word)
 {
 	BUG_ON(word < 1 || word > rt2x00dev->ops->rf_size / sizeof(u32));

drivers/net/wireless/ralink/rt2x00/rt61pci.c

@@ -236,7 +236,7 @@ static const struct rt2x00debug rt61pci_rt2x00debug = {
 		.word_count	= BBP_SIZE / sizeof(u8),
 	},
 	.rf	= {
-		.read		= _rt2x00_rf_read,
+		.read		= rt2x00_rf_read,
 		.write		= rt61pci_rf_write,
 		.word_base	= RF_BASE,
 		.word_size	= sizeof(u32),
@@ -922,10 +922,10 @@ static void rt61pci_config_txpower(struct rt2x00_dev *rt2x00dev,
 {
 	struct rf_channel rf;
 
-	rt2x00_rf_read(rt2x00dev, 1, &rf.rf1);
-	rt2x00_rf_read(rt2x00dev, 2, &rf.rf2);
-	rt2x00_rf_read(rt2x00dev, 3, &rf.rf3);
-	rt2x00_rf_read(rt2x00dev, 4, &rf.rf4);
+	rf.rf1 = rt2x00_rf_read(rt2x00dev, 1);
+	rf.rf2 = rt2x00_rf_read(rt2x00dev, 2);
+	rf.rf3 = rt2x00_rf_read(rt2x00dev, 3);
+	rf.rf4 = rt2x00_rf_read(rt2x00dev, 4);
 
 	rt61pci_config_channel(rt2x00dev, &rf, txpower);
 }

drivers/net/wireless/ralink/rt2x00/rt73usb.c

@@ -181,7 +181,7 @@ static const struct rt2x00debug rt73usb_rt2x00debug = {
 		.word_count	= BBP_SIZE / sizeof(u8),
 	},
 	.rf	= {
-		.read		= _rt2x00_rf_read,
+		.read		= rt2x00_rf_read,
 		.write		= rt73usb_rf_write,
 		.word_base	= RF_BASE,
 		.word_size	= sizeof(u32),
@@ -805,10 +805,10 @@ static void rt73usb_config_txpower(struct rt2x00_dev *rt2x00dev,
 {
 	struct rf_channel rf;
 
-	rt2x00_rf_read(rt2x00dev, 1, &rf.rf1);
-	rt2x00_rf_read(rt2x00dev, 2, &rf.rf2);
-	rt2x00_rf_read(rt2x00dev, 3, &rf.rf3);
-	rt2x00_rf_read(rt2x00dev, 4, &rf.rf4);
+	rf.rf1 = rt2x00_rf_read(rt2x00dev, 1);
+	rf.rf2 = rt2x00_rf_read(rt2x00dev, 2);
+	rf.rf3 = rt2x00_rf_read(rt2x00dev, 3);
+	rf.rf4 = rt2x00_rf_read(rt2x00dev, 4);
 
 	rt73usb_config_channel(rt2x00dev, &rf, txpower);
 }