[PATCH] rt2x00: Remove duplicate code in MAC & BSSID handling

The various drivers contained duplicate code to handle the
MAC and BSSID initialization correctly. This moves the
address copy to little endian variables to rt2x00config.

Signed-off-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

7 files changed, 76 insertions, 118 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2400pci.c b/drivers/net/wireless/rt2x00/rt2400pci.c
index faa47111a579..7b2a85ade135 100644
--- a/drivers/net/wireless/rt2x00/rt2400pci.c
+++ b/drivers/net/wireless/rt2x00/rt2400pci.c
@@ -249,32 +249,18 @@ static int rt2400pci_rfkill_poll(struct rt2x00_dev *rt2x00dev)
 /*
  * Configuration handlers.
  */
-static void rt2400pci_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *addr)
+static void rt2400pci_config_mac_addr(struct rt2x00_dev *rt2x00dev,
+                                      __le32 *mac)
 {
-        __le32 reg[2];
-
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, addr, ETH_ALEN);
-
-        /*
-         * The MAC address is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2x00pci_register_multiwrite(rt2x00dev, CSR3, &reg, sizeof(reg));
+        rt2x00pci_register_multiwrite(rt2x00dev, CSR3, mac,
+                                      (2 * sizeof(__le32)));
 }
 
-static void rt2400pci_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
+static void rt2400pci_config_bssid(struct rt2x00_dev *rt2x00dev,
+                                   __le32 *bssid)
 {
-        __le32 reg[2];
-
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, bssid, ETH_ALEN);
-
-        /*
-         * The BSSID is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2x00pci_register_multiwrite(rt2x00dev, CSR5, &reg, sizeof(reg));
+        rt2x00pci_register_multiwrite(rt2x00dev, CSR5, bssid,
+                                      (2 * sizeof(__le32)));
 }
 
 static void rt2400pci_config_type(struct rt2x00_dev *rt2x00dev, int type)
diff --git a/drivers/net/wireless/rt2x00/rt2500pci.c b/drivers/net/wireless/rt2x00/rt2500pci.c
index 842da900d7c1..63a7b3cdf0cd 100644
--- a/drivers/net/wireless/rt2x00/rt2500pci.c
+++ b/drivers/net/wireless/rt2x00/rt2500pci.c
@@ -249,32 +249,18 @@ static int rt2500pci_rfkill_poll(struct rt2x00_dev *rt2x00dev)
 /*
  * Configuration handlers.
  */
-static void rt2500pci_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *addr)
+static void rt2500pci_config_mac_addr(struct rt2x00_dev *rt2x00dev,
+                                      __le32 *mac)
 {
-        __le32 reg[2];
-
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, addr, ETH_ALEN);
-
-        /*
-         * The MAC address is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2x00pci_register_multiwrite(rt2x00dev, CSR3, &reg, sizeof(reg));
+        rt2x00pci_register_multiwrite(rt2x00dev, CSR3, mac,
+                                      (2 * sizeof(__le32)));
 }
 
-static void rt2500pci_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
+static void rt2500pci_config_bssid(struct rt2x00_dev *rt2x00dev,
+                                   __le32 *bssid)
 {
-        __le32 reg[2];
-
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, bssid, ETH_ALEN);
-
-        /*
-         * The BSSID is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2x00pci_register_multiwrite(rt2x00dev, CSR5, &reg, sizeof(reg));
+        rt2x00pci_register_multiwrite(rt2x00dev, CSR5, bssid,
+                                      (2 * sizeof(__le32)));
 }
 
 static void rt2500pci_config_type(struct rt2x00_dev *rt2x00dev, const int type)
diff --git a/drivers/net/wireless/rt2x00/rt2500usb.c b/drivers/net/wireless/rt2x00/rt2500usb.c
index 7aacc7b5c1b2..973f653ecfc2 100644
--- a/drivers/net/wireless/rt2x00/rt2500usb.c
+++ b/drivers/net/wireless/rt2x00/rt2500usb.c
@@ -254,32 +254,18 @@ static const struct rt2x00debug rt2500usb_rt2x00debug = {
 /*
  * Configuration handlers.
  */
-static void rt2500usb_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *addr)
+static void rt2500usb_config_mac_addr(struct rt2x00_dev *rt2x00dev,
+                                      __le32 *mac)
 {
-        __le16 reg[3];
-
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, addr, ETH_ALEN);
-
-        /*
-         * The MAC address is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR2, &reg, sizeof(reg));
+        rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR2, &mac,
+                                      (3 * sizeof(__le16)));
 }
 
-static void rt2500usb_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
+static void rt2500usb_config_bssid(struct rt2x00_dev *rt2x00dev,
+                                   __le32 *bssid)
 {
-        __le16 reg[3];
-
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, bssid, ETH_ALEN);
-
-        /*
-         * The BSSID is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR5, &reg, sizeof(reg));
+        rt2500usb_register_multiwrite(rt2x00dev, MAC_CSR5, bssid,
+                                      (3 * sizeof(__le16)));
 }
 
 static void rt2500usb_config_type(struct rt2x00_dev *rt2x00dev, const int type)
diff --git a/drivers/net/wireless/rt2x00/rt2x00.h b/drivers/net/wireless/rt2x00/rt2x00.h
index 6262d4e47c56..5d30ca6680b6 100644
--- a/drivers/net/wireless/rt2x00/rt2x00.h
+++ b/drivers/net/wireless/rt2x00/rt2x00.h
@@ -408,8 +408,8 @@ struct rt2x00lib_ops {
         /*
          * Configuration handlers.
          */
-        void (*config_mac_addr) (struct rt2x00_dev *rt2x00dev, u8 *mac);
-        void (*config_bssid) (struct rt2x00_dev *rt2x00dev, u8 *bssid);
+        void (*config_mac_addr) (struct rt2x00_dev *rt2x00dev, __le32 *mac);
+        void (*config_bssid) (struct rt2x00_dev *rt2x00dev, __le32 *bssid);
         void (*config_packet_filter) (struct rt2x00_dev *rt2x00dev,
                                       const unsigned int filter);
         void (*config_type) (struct rt2x00_dev *rt2x00dev, const int type);
diff --git a/drivers/net/wireless/rt2x00/rt2x00config.c b/drivers/net/wireless/rt2x00/rt2x00config.c
index 13b510687bcb..aeeaa0c14245 100644
--- a/drivers/net/wireless/rt2x00/rt2x00config.c
+++ b/drivers/net/wireless/rt2x00/rt2x00config.c
@@ -34,16 +34,44 @@
 #include "rt2x00.h"
 #include "rt2x00lib.h"
 
+
+/*
+ * The MAC and BSSID addressess are simple array of bytes,
+ * these arrays are little endian, so when sending the addressess
+ * to the drivers, copy the it into a endian-signed variable.
+ *
+ * Note that all devices (except rt2500usb) have 32 bits
+ * register word sizes. This means that whatever variable we
+ * pass _must_ be a multiple of 32 bits. Otherwise the device
+ * might not accept what we are sending to it.
+ * This will also make it easier for the driver to write
+ * the data to the device.
+ *
+ * Also note that when NULL is passed as address the
+ * we will send 00:00:00:00:00 to the device to clear the address.
+ * This will prevent the device being confused when it wants
+ * to ACK frames or consideres itself associated.
+ */
 void rt2x00lib_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *mac)
 {
+        __le32 reg[2];
+
+        memset(&reg, 0, sizeof(reg));
         if (mac)
-                rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, mac);
+                memcpy(&reg, mac, ETH_ALEN);
+
+        rt2x00dev->ops->lib->config_mac_addr(rt2x00dev, &reg[0]);
 }
 
 void rt2x00lib_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
 {
+        __le32 reg[2];
+
+        memset(&reg, 0, sizeof(reg));
         if (bssid)
-                rt2x00dev->ops->lib->config_bssid(rt2x00dev, bssid);
+                memcpy(&reg, bssid, ETH_ALEN);
+
+        rt2x00dev->ops->lib->config_bssid(rt2x00dev, &reg[0]);
 }
 
 void rt2x00lib_config_type(struct rt2x00_dev *rt2x00dev, int type)
diff --git a/drivers/net/wireless/rt2x00/rt61pci.c b/drivers/net/wireless/rt2x00/rt61pci.c
index 6aa517645b6a..5d31ced11149 100644
--- a/drivers/net/wireless/rt2x00/rt61pci.c
+++ b/drivers/net/wireless/rt2x00/rt61pci.c
@@ -274,42 +274,28 @@ static int rt61pci_rfkill_poll(struct rt2x00_dev *rt2x00dev)
 /*
  * Configuration handlers.
  */
-static void rt61pci_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *addr)
+static void rt61pci_config_mac_addr(struct rt2x00_dev *rt2x00dev, __le32 *mac)
 {
-        __le32 reg[2];
         u32 tmp;
 
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, addr, ETH_ALEN);
-
-        tmp = le32_to_cpu(reg[1]);
+        tmp = le32_to_cpu(mac[1]);
         rt2x00_set_field32(&tmp, MAC_CSR3_UNICAST_TO_ME_MASK, 0xff);
-        reg[1] = cpu_to_le32(tmp);
+        mac[1] = cpu_to_le32(tmp);
 
-        /*
-         * The MAC address is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2x00pci_register_multiwrite(rt2x00dev, MAC_CSR2, &reg, sizeof(reg));
+        rt2x00pci_register_multiwrite(rt2x00dev, MAC_CSR2, mac,
+                                      (2 * sizeof(__le32)));
 }
 
-static void rt61pci_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
+static void rt61pci_config_bssid(struct rt2x00_dev *rt2x00dev, __le32 *bssid)
 {
-        __le32 reg[2];
         u32 tmp;
 
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, bssid, ETH_ALEN);
-
-        tmp = le32_to_cpu(reg[1]);
+        tmp = le32_to_cpu(bssid[1]);
         rt2x00_set_field32(&tmp, MAC_CSR5_BSS_ID_MASK, 3);
-        reg[1] = cpu_to_le32(tmp);
+        bssid[1] = cpu_to_le32(tmp);
 
-        /*
-         * The BSSID is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt2x00pci_register_multiwrite(rt2x00dev, MAC_CSR4, &reg, sizeof(reg));
+        rt2x00pci_register_multiwrite(rt2x00dev, MAC_CSR4, bssid,
+                                      (2 * sizeof(__le32)));
 }
 
 static void rt61pci_config_type(struct rt2x00_dev *rt2x00dev, const int type)
diff --git a/drivers/net/wireless/rt2x00/rt73usb.c b/drivers/net/wireless/rt2x00/rt73usb.c
index ffed3ec5fb99..5fa697bfaa14 100644
--- a/drivers/net/wireless/rt2x00/rt73usb.c
+++ b/drivers/net/wireless/rt2x00/rt73usb.c
@@ -255,42 +255,28 @@ static const struct rt2x00debug rt73usb_rt2x00debug = {
 /*
  * Configuration handlers.
  */
-static void rt73usb_config_mac_addr(struct rt2x00_dev *rt2x00dev, u8 *addr)
+static void rt73usb_config_mac_addr(struct rt2x00_dev *rt2x00dev, __le32 *mac)
 {
-        __le32 reg[2];
         u32 tmp;
 
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, addr, ETH_ALEN);
-
-        tmp = le32_to_cpu(reg[1]);
+        tmp = le32_to_cpu(mac[1]);
         rt2x00_set_field32(&tmp, MAC_CSR3_UNICAST_TO_ME_MASK, 0xff);
-        reg[1] = cpu_to_le32(tmp);
+        mac[1] = cpu_to_le32(tmp);
 
-        /*
-         * The MAC address is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt73usb_register_multiwrite(rt2x00dev, MAC_CSR2, &reg, sizeof(reg));
+        rt73usb_register_multiwrite(rt2x00dev, MAC_CSR2, mac,
+                                    (2 * sizeof(__le32)));
 }
 
-static void rt73usb_config_bssid(struct rt2x00_dev *rt2x00dev, u8 *bssid)
+static void rt73usb_config_bssid(struct rt2x00_dev *rt2x00dev, __le32 *bssid)
 {
-        __le32 reg[2];
         u32 tmp;
 
-        memset(&reg, 0, sizeof(reg));
-        memcpy(&reg, bssid, ETH_ALEN);
-
-        tmp = le32_to_cpu(reg[1]);
+        tmp = le32_to_cpu(bssid[1]);
         rt2x00_set_field32(&tmp, MAC_CSR5_BSS_ID_MASK, 3);
-        reg[1] = cpu_to_le32(tmp);
+        bssid[1] = cpu_to_le32(tmp);
 
-        /*
-         * The BSSID is passed to us as an array of bytes,
-         * that array is little endian, so no need for byte ordering.
-         */
-        rt73usb_register_multiwrite(rt2x00dev, MAC_CSR4, &reg, sizeof(reg));
+        rt73usb_register_multiwrite(rt2x00dev, MAC_CSR4, bssid,
+                                    (2 * sizeof(__le32)));
 }
 
 static void rt73usb_config_type(struct rt2x00_dev *rt2x00dev, const int type)