b43legacy: fix upload of beacon packets to the hardware

This fixes uploading of the beacon data and writing of the TIM and DTIM offsets.

The patch by Michael Buesch has been ported to b43legacy.
Signed-off-by: Stefano Brivio <stefano.brivio@polimi.it>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/b43legacy/b43legacy.h

@@ -130,13 +130,19 @@
 #define B43legacy_SHM_SH_HOSTFHI	0x0060 /* Hostflags ucode opts (high) */
 /* SHM_SHARED crypto engine */
 #define B43legacy_SHM_SH_KEYIDXBLOCK	0x05D4 /* Key index/algorithm block */
-/* SHM_SHARED beacon variables */
+/* SHM_SHARED beacon/AP variables */
+#define B43legacy_SHM_SH_DTIMP		0x0012 /* DTIM period */
+#define B43legacy_SHM_SH_BTL0		0x0018 /* Beacon template length 0 */
+#define B43legacy_SHM_SH_BTL1		0x001A /* Beacon template length 1 */
+#define B43legacy_SHM_SH_BTSFOFF	0x001C /* Beacon TSF offset */
+#define B43legacy_SHM_SH_TIMPOS		0x001E /* TIM position in beacon */
 #define B43legacy_SHM_SH_BEACPHYCTL	0x0054 /* Beacon PHY TX control word */
 /* SHM_SHARED ACK/CTS control */
 #define B43legacy_SHM_SH_ACKCTSPHYCTL	0x0022 /* ACK/CTS PHY control word */
 /* SHM_SHARED probe response variables */
-#define B43legacy_SHM_SH_PRPHYCTL	0x0188 /* Probe Resp PHY TX control */
+#define B43legacy_SHM_SH_PRTLEN		0x004A /* Probe Response template length */
 #define B43legacy_SHM_SH_PRMAXTIME	0x0074 /* Probe Response max time */
+#define B43legacy_SHM_SH_PRPHYCTL	0x0188 /* Probe Resp PHY TX control */
 /* SHM_SHARED rate tables */
 /* SHM_SHARED microcode soft registers */
 #define B43legacy_SHM_SH_UCODEREV	0x0000 /* Microcode revision */
@@ -601,6 +607,12 @@ struct b43legacy_wl {
 	u8 nr_devs;
 
 	bool radiotap_enabled;
+
+	/* The beacon we are currently using (AP or IBSS mode).
+	 * This beacon stuff is protected by the irq_lock. */
+	struct sk_buff *current_beacon;
+	bool beacon0_uploaded;
+	bool beacon1_uploaded;
 };
 
 /* Pointers to the firmware data and meta information about it. */
@@ -699,9 +711,6 @@ struct b43legacy_wldev {
 	u8 max_nr_keys;
 	struct b43legacy_key key[58];
 
-	/* Cached beacon template while uploading the template. */
-	struct sk_buff *cached_beacon;
-
 	/* Firmware data */
 	struct b43legacy_firmware fw;