staging: vt6656: Check the return value of vnt_control_out_* calls

Check the return value of vnt_control_out_* function calls. When
necessary modify the function prototype to be able to return the new
checked error code.

It's safe to modify all the function prototypes without fix the call
because the only change is the return value from void to int. If before
the call didn't check the return value, now neither.
Signed-off-by: Oscar Carter <oscar.carter@gmx.com>
Link: https://lore.kernel.org/r/20200425134257.4502-2-oscar.carter@gmx.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/baseband.c

@@ -23,6 +23,7 @@
  */
 
 #include <linux/bits.h>
+#include <linux/errno.h>
 #include <linux/kernel.h>
 #include "device.h"
 #include "mac.h"
@@ -367,21 +368,22 @@ int vnt_set_short_slot_time(struct vnt_private *priv)
 
 	ret = vnt_control_in_u8(priv, MESSAGE_REQUEST_BBREG, 0xe7, &bb_vga);
 	if (ret)
-		goto end;
+		return ret;
 
 	if (bb_vga == priv->bb_vga[0])
 		priv->bb_rx_conf |= 0x20;
 
-	ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x0a,
+	return vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x0a,
 				  priv->bb_rx_conf);
-
-end:
-	return ret;
 }
 
-void vnt_set_vga_gain_offset(struct vnt_private *priv, u8 data)
+int vnt_set_vga_gain_offset(struct vnt_private *priv, u8 data)
 {
-	vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0xE7, data);
+	int ret;
+
+	ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0xE7, data);
+	if (ret)
+		return ret;
 
 	/* patch for 3253B0 Baseband with Cardbus module */
 	if (priv->short_slot_time)
@@ -389,7 +391,8 @@ void vnt_set_vga_gain_offset(struct vnt_private *priv, u8 data)
 	else
 		priv->bb_rx_conf |= 0x20; /* 0010 0000 */
 
-	vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x0a, priv->bb_rx_conf);
+	return vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x0a,
+				  priv->bb_rx_conf);
 }
 
 /*
@@ -430,12 +433,13 @@ int vnt_exit_deep_sleep(struct vnt_private *priv)
 	return vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x0d, 0x01);
 }
 
-void vnt_update_pre_ed_threshold(struct vnt_private *priv, int scanning)
+int vnt_update_pre_ed_threshold(struct vnt_private *priv, int scanning)
 {
 	const struct vnt_threshold *threshold = NULL;
 	u8 length;
 	u8 cr_201, cr_206;
 	u8 ed_inx;
+	int ret;
 
 	switch (priv->rf_type) {
 	case RF_AL2230:
@@ -458,7 +462,7 @@ void vnt_update_pre_ed_threshold(struct vnt_private *priv, int scanning)
 	}
 
 	if (!threshold)
-		return;
+		return -EINVAL;
 
 	for (ed_inx = scanning ? 0 : length - 1; ed_inx > 0; ed_inx--) {
 		if (priv->bb_pre_ed_rssi <= threshold[ed_inx].bb_pre_ed_rssi)
@@ -469,14 +473,17 @@ void vnt_update_pre_ed_threshold(struct vnt_private *priv, int scanning)
 	cr_206 = threshold[ed_inx].cr_206;
 
 	if (ed_inx == priv->bb_pre_ed_index && !scanning)
-		return;
+		return 0;
 
 	priv->bb_pre_ed_index = ed_inx;
 
 	dev_dbg(&priv->usb->dev, "%s bb_pre_ed_rssi %d\n",
 		__func__, priv->bb_pre_ed_rssi);
 
-	vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0xc9, cr_201);
-	vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0xce, cr_206);
+	ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0xc9, cr_201);
+	if (ret)
+		return ret;
+
+	return vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0xce, cr_206);
 }
 

drivers/staging/vt6656/baseband.h

@@ -67,11 +67,11 @@
 #define TOP_RATE_1M         0x00100000
 
 int vnt_set_short_slot_time(struct vnt_private *priv);
-void vnt_set_vga_gain_offset(struct vnt_private *priv, u8 data);
+int vnt_set_vga_gain_offset(struct vnt_private *priv, u8 data);
 int vnt_set_antenna_mode(struct vnt_private *priv, u8 antenna_mode);
 int vnt_vt3184_init(struct vnt_private *priv);
 int vnt_set_deep_sleep(struct vnt_private *priv);
 int vnt_exit_deep_sleep(struct vnt_private *priv);
-void vnt_update_pre_ed_threshold(struct vnt_private *priv, int scanning);
+int vnt_update_pre_ed_threshold(struct vnt_private *priv, int scanning);
 
 #endif /* __BASEBAND_H__ */

drivers/staging/vt6656/card.c

@@ -27,6 +27,7 @@
  */
 
 #include <linux/bitops.h>
+#include <linux/errno.h>
 #include "device.h"
 #include "card.h"
 #include "baseband.h"
@@ -55,10 +56,12 @@ static const u16 cw_rxbcntsf_off[MAX_RATE] = {
  *  Out:
  *      none
  */
-void vnt_set_channel(struct vnt_private *priv, u32 connection_channel)
+int vnt_set_channel(struct vnt_private *priv, u32 connection_channel)
 {
+	int ret;
+
 	if (connection_channel > CB_MAX_CHANNEL || !connection_channel)
-		return;
+		return -EINVAL;
 
 	/* clear NAV */
 	vnt_mac_reg_bits_on(priv, MAC_REG_MACCR, MACCR_CLRNAV);
@@ -67,10 +70,12 @@ void vnt_set_channel(struct vnt_private *priv, u32 connection_channel)
 	vnt_mac_reg_bits_off(priv, MAC_REG_CHANNEL,
 			     (BIT(7) | BIT(5) | BIT(4)));
 
-	vnt_control_out(priv, MESSAGE_TYPE_SELECT_CHANNEL,
+	ret = vnt_control_out(priv, MESSAGE_TYPE_SELECT_CHANNEL,
 			      connection_channel, 0, 0, NULL);
+	if (ret)
+		return ret;
 
-	vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_CHANNEL,
+	return vnt_control_out_u8(priv, MESSAGE_REQUEST_MACREG, MAC_REG_CHANNEL,
 				  (u8)(connection_channel | 0x80));
 }
 
@@ -107,10 +112,11 @@ static const u8 vnt_rspinf_gb_table[] = {
  *
  */
 
-void vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
+int vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
 {
 	const u8 *data;
 	u16 len;
+	int ret;
 
 	if (priv->preamble_type) {
 		data = vnt_rspinf_b_short_table;
@@ -121,8 +127,10 @@ void vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
 	}
 
 	 /* RSPINF_b_1 to RSPINF_b_11 */
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_B_1,
+	ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_B_1,
 			      MESSAGE_REQUEST_MACREG, len, data);
+	if (ret)
+		return ret;
 
 	if (bb_type == BB_TYPE_11A) {
 		data = vnt_rspinf_a_table;
@@ -133,7 +141,7 @@ void vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
 	}
 
 	/* RSPINF_a_6 to RSPINF_a_72 */
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_A_6,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_RSPINF_A_6,
 			       MESSAGE_REQUEST_MACREG, len, data);
 }
 
@@ -149,10 +157,11 @@ void vnt_set_rspinf(struct vnt_private *priv, u8 bb_type)
  * Return Value: None.
  *
  */
-void vnt_update_ifs(struct vnt_private *priv)
+int vnt_update_ifs(struct vnt_private *priv)
 {
 	u8 max_min = 0;
 	u8 data[4];
+	int ret;
 
 	if (priv->packet_type == PK_TYPE_11A) {
 		priv->slot = C_SLOT_SHORT;
@@ -212,12 +221,14 @@ void vnt_update_ifs(struct vnt_private *priv)
 	data[2] = (u8)priv->eifs;
 	data[3] = (u8)priv->slot;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_SIFS,
+	ret = vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_SIFS,
 			      MESSAGE_REQUEST_MACREG, 4, &data[0]);
+	if (ret)
+		return ret;
 
 	max_min |= 0xa0;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_CWMAXMIN0,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_CWMAXMIN0,
 			       MESSAGE_REQUEST_MACREG, 1, &max_min);
 }
 
@@ -281,7 +292,7 @@ u64 vnt_get_tsf_offset(u8 rx_rate, u64 tsf1, u64 tsf2)
  * Return Value: none
  *
  */
-void vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
+int vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
 		   u64 time_stamp, u64 local_tsf)
 {
 	u64 tsf_offset = 0;
@@ -298,7 +309,7 @@ void vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
 	data[6] = (u8)(tsf_offset >> 48);
 	data[7] = (u8)(tsf_offset >> 56);
 
-	vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
+	return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
 			       MESSAGE_REQUEST_TSF, 0, 8, data);
 }
 
@@ -388,7 +399,7 @@ u64 vnt_get_next_tbtt(u64 tsf, u16 beacon_interval)
  * Return Value: none
  *
  */
-void vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
+int vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
 {
 	u64 next_tbtt = 0;
 	u8 data[8];
@@ -406,7 +417,7 @@ void vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
 	data[6] = (u8)(next_tbtt >> 48);
 	data[7] = (u8)(next_tbtt >> 56);
 
-	vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
+	return vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
 			       MESSAGE_REQUEST_TBTT, 0, 8, data);
 }
 
@@ -425,10 +436,11 @@ void vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval)
  * Return Value: none
  *
  */
-void vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
+int vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
 			 u16 beacon_interval)
 {
 	u8 data[8];
+	int ret;
 
 	tsf = vnt_get_next_tbtt(tsf, beacon_interval);
 
@@ -441,10 +453,13 @@ void vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
 	data[6] = (u8)(tsf >> 48);
 	data[7] = (u8)(tsf >> 56);
 
-	vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
+	ret = vnt_control_out(priv, MESSAGE_TYPE_SET_TSFTBTT,
 			      MESSAGE_REQUEST_TBTT, 0, 8, data);
+	if (ret)
+		return ret;
 
 	dev_dbg(&priv->usb->dev, "%s TBTT: %8llx\n", __func__, tsf);
+	return 0;
 }
 
 /*
@@ -533,8 +548,10 @@ int vnt_radio_power_on(struct vnt_private *priv)
 	return vnt_mac_reg_bits_off(priv, MAC_REG_GPIOCTL1, GPIO3_INTMD);
 }
 
-void vnt_set_bss_mode(struct vnt_private *priv)
+int vnt_set_bss_mode(struct vnt_private *priv)
 {
+	int ret = 0;
+
 	if (priv->rf_type == RF_AIROHA7230 && priv->bb_type == BB_TYPE_11A)
 		vnt_mac_set_bb_type(priv, BB_TYPE_11G);
 	else
@@ -543,11 +560,16 @@ void vnt_set_bss_mode(struct vnt_private *priv)
 	priv->packet_type = vnt_get_pkt_type(priv);
 
 	if (priv->bb_type == BB_TYPE_11A)
-		vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x88, 0x03);
+		ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
+					 0x88, 0x03);
 	else if (priv->bb_type == BB_TYPE_11B)
-		vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x88, 0x02);
+		ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
+					 0x88, 0x02);
 	else if (priv->bb_type == BB_TYPE_11G)
-		vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG, 0x88, 0x08);
+		ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
+					 0x88, 0x08);
+	if (ret)
+		return ret;
 
 	vnt_update_ifs(priv);
 	vnt_set_rspinf(priv, (u8)priv->bb_type);
@@ -556,8 +578,10 @@ void vnt_set_bss_mode(struct vnt_private *priv)
 		if (priv->rf_type == RF_AIROHA7230) {
 			priv->bb_vga[0] = 0x20;
 
-			vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
+			ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
 						 0xe7, priv->bb_vga[0]);
+			if (ret)
+				return ret;
 		}
 
 		priv->bb_vga[2] = 0x10;
@@ -566,8 +590,10 @@ void vnt_set_bss_mode(struct vnt_private *priv)
 		if (priv->rf_type == RF_AIROHA7230) {
 			priv->bb_vga[0] = 0x1c;
 
-			vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
+			ret = vnt_control_out_u8(priv, MESSAGE_REQUEST_BBREG,
 						 0xe7, priv->bb_vga[0]);
+			if (ret)
+				return ret;
 		}
 
 		priv->bb_vga[2] = 0x0;
@@ -575,4 +601,5 @@ void vnt_set_bss_mode(struct vnt_private *priv)
 	}
 
 	vnt_set_vga_gain_offset(priv, priv->bb_vga[0]);
+	return 0;
 }

drivers/staging/vt6656/card.h

@@ -25,23 +25,23 @@
 
 struct vnt_private;
 
-void vnt_set_channel(struct vnt_private *priv, u32 connection_channel);
-void vnt_set_rspinf(struct vnt_private *priv, u8 bb_type);
-void vnt_update_ifs(struct vnt_private *priv);
+int vnt_set_channel(struct vnt_private *priv, u32 connection_channel);
+int vnt_set_rspinf(struct vnt_private *priv, u8 bb_type);
+int vnt_update_ifs(struct vnt_private *priv);
 void vnt_update_top_rates(struct vnt_private *priv);
 bool vnt_ofdm_min_rate(struct vnt_private *priv);
-void vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
+int vnt_adjust_tsf(struct vnt_private *priv, u8 rx_rate,
 		   u64 time_stamp, u64 local_tsf);
 bool vnt_get_current_tsf(struct vnt_private *priv, u64 *current_tsf);
 bool vnt_clear_current_tsf(struct vnt_private *priv);
-void vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval);
-void vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
+int vnt_reset_next_tbtt(struct vnt_private *priv, u16 beacon_interval);
+int vnt_update_next_tbtt(struct vnt_private *priv, u64 tsf,
 			 u16 beacon_interval);
 u64 vnt_get_next_tbtt(u64 tsf, u16 beacon_interval);
 u64 vnt_get_tsf_offset(u8 rx_rate, u64 tsf1, u64 tsf2);
 int vnt_radio_power_off(struct vnt_private *priv);
 int vnt_radio_power_on(struct vnt_private *priv);
 u8 vnt_get_pkt_type(struct vnt_private *priv);
-void vnt_set_bss_mode(struct vnt_private *priv);
+int vnt_set_bss_mode(struct vnt_private *priv);
 
 #endif /* __CARD_H__ */

drivers/staging/vt6656/mac.c

@@ -35,12 +35,13 @@
  * Return Value: none
  *
  */
-void vnt_mac_set_filter(struct vnt_private *priv, u64 mc_filter)
+int vnt_mac_set_filter(struct vnt_private *priv, u64 mc_filter)
 {
 	__le64 le_mc = cpu_to_le64(mc_filter);
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_MAR0,
-			MESSAGE_REQUEST_MACREG, sizeof(le_mc), (u8 *)&le_mc);
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_MAR0,
+			       MESSAGE_REQUEST_MACREG, sizeof(le_mc),
+			       (u8 *)&le_mc);
 }
 
 /*
@@ -54,20 +55,21 @@ void vnt_mac_set_filter(struct vnt_private *priv, u64 mc_filter)
  *
  *
  */
-void vnt_mac_shutdown(struct vnt_private *priv)
+int vnt_mac_shutdown(struct vnt_private *priv)
 {
-	vnt_control_out(priv, MESSAGE_TYPE_MACSHUTDOWN, 0, 0, 0, NULL);
+	return vnt_control_out(priv, MESSAGE_TYPE_MACSHUTDOWN, 0, 0, 0, NULL);
 }
 
-void vnt_mac_set_bb_type(struct vnt_private *priv, u8 type)
+int vnt_mac_set_bb_type(struct vnt_private *priv, u8 type)
 {
 	u8 data[2];
 
 	data[0] = type;
 	data[1] = EnCFG_BBType_MASK;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG0,
-			MESSAGE_REQUEST_MACREG,	ARRAY_SIZE(data), data);
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG0,
+			       MESSAGE_REQUEST_MACREG,	ARRAY_SIZE(data),
+			       data);
 }
 
 /*
@@ -84,9 +86,9 @@ void vnt_mac_set_bb_type(struct vnt_private *priv, u8 type)
  * Return Value: none
  *
  */
-void vnt_mac_disable_keyentry(struct vnt_private *priv, u8 entry_idx)
+int vnt_mac_disable_keyentry(struct vnt_private *priv, u8 entry_idx)
 {
-	vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY, 0, 0,
+	return vnt_control_out(priv, MESSAGE_TYPE_CLRKEYENTRY, 0, 0,
 			       sizeof(entry_idx), &entry_idx);
 }
 
@@ -104,7 +106,7 @@ void vnt_mac_disable_keyentry(struct vnt_private *priv, u8 entry_idx)
  * Return Value: none
  *
  */
-void vnt_mac_set_keyentry(struct vnt_private *priv, u16 key_ctl, u32 entry_idx,
+int vnt_mac_set_keyentry(struct vnt_private *priv, u16 key_ctl, u32 entry_idx,
 			 u32 key_idx, u8 *addr, u8 *key)
 {
 	struct vnt_mac_set_key set_key;
@@ -124,7 +126,7 @@ void vnt_mac_set_keyentry(struct vnt_private *priv, u16 key_ctl, u32 entry_idx,
 	dev_dbg(&priv->usb->dev, "offset %d key ctl %d set key %24ph\n",
 		offset, key_ctl, (u8 *)&set_key);
 
-	vnt_control_out(priv, MESSAGE_TYPE_SETKEY, offset,
+	return vnt_control_out(priv, MESSAGE_TYPE_SETKEY, offset,
 			       (u16)key_idx, sizeof(struct vnt_mac_set_key),
 			       (u8 *)&set_key);
 }
@@ -151,75 +153,75 @@ int vnt_mac_reg_bits_on(struct vnt_private *priv, u8 reg_ofs, u8 bits)
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 
-void vnt_mac_write_word(struct vnt_private *priv, u8 reg_ofs, u16 word)
+int vnt_mac_write_word(struct vnt_private *priv, u8 reg_ofs, u16 word)
 {
 	u8 data[2];
 
 	data[0] = (u8)(word & 0xff);
 	data[1] = (u8)(word >> 8);
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, reg_ofs,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE, reg_ofs,
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 
-void vnt_mac_set_bssid_addr(struct vnt_private *priv, u8 *addr)
+int vnt_mac_set_bssid_addr(struct vnt_private *priv, u8 *addr)
 {
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_BSSID0,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_BSSID0,
 			       MESSAGE_REQUEST_MACREG, ETH_ALEN, addr);
 }
 
-void vnt_mac_enable_protect_mode(struct vnt_private *priv)
+int vnt_mac_enable_protect_mode(struct vnt_private *priv)
 {
 	u8 data[2];
 
 	data[0] = EnCFG_ProtectMd;
 	data[1] = EnCFG_ProtectMd;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG0,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG0,
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 
-void vnt_mac_disable_protect_mode(struct vnt_private *priv)
+int vnt_mac_disable_protect_mode(struct vnt_private *priv)
 {
 	u8 data[2];
 
 	data[0] = 0;
 	data[1] = EnCFG_ProtectMd;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG0,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG0,
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 
-void vnt_mac_enable_barker_preamble_mode(struct vnt_private *priv)
+int vnt_mac_enable_barker_preamble_mode(struct vnt_private *priv)
 {
 	u8 data[2];
 
 	data[0] = EnCFG_BarkerPream;
 	data[1] = EnCFG_BarkerPream;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG2,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG2,
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 
-void vnt_mac_disable_barker_preamble_mode(struct vnt_private *priv)
+int vnt_mac_disable_barker_preamble_mode(struct vnt_private *priv)
 {
 	u8 data[2];
 
 	data[0] = 0;
 	data[1] = EnCFG_BarkerPream;
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG2,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE_MASK, MAC_REG_ENCFG2,
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 
-void vnt_mac_set_beacon_interval(struct vnt_private *priv, u16 interval)
+int vnt_mac_set_beacon_interval(struct vnt_private *priv, u16 interval)
 {
 	u8 data[2];
 
 	data[0] = (u8)(interval & 0xff);
 	data[1] = (u8)(interval >> 8);
 
-	vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_BI,
+	return vnt_control_out(priv, MESSAGE_TYPE_WRITE, MAC_REG_BI,
 			       MESSAGE_REQUEST_MACREG, ARRAY_SIZE(data), data);
 }
 

drivers/staging/vt6656/mac.h

@@ -355,21 +355,21 @@ struct vnt_mac_set_key {
 	u8 key[WLAN_KEY_LEN_CCMP];
 } __packed;
 
-void vnt_mac_set_filter(struct vnt_private *priv, u64 mc_filter);
-void vnt_mac_shutdown(struct vnt_private *priv);
-void vnt_mac_set_bb_type(struct vnt_private *priv, u8 type);
-void vnt_mac_disable_keyentry(struct vnt_private *priv, u8 entry_idx);
-void vnt_mac_set_keyentry(struct vnt_private *priv, u16 key_ctl, u32 entry_idx,
+int vnt_mac_set_filter(struct vnt_private *priv, u64 mc_filter);
+int vnt_mac_shutdown(struct vnt_private *priv);
+int vnt_mac_set_bb_type(struct vnt_private *priv, u8 type);
+int vnt_mac_disable_keyentry(struct vnt_private *priv, u8 entry_idx);
+int vnt_mac_set_keyentry(struct vnt_private *priv, u16 key_ctl, u32 entry_idx,
 			 u32 key_idx, u8 *addr, u8 *key);
 int vnt_mac_reg_bits_off(struct vnt_private *priv, u8 reg_ofs, u8 bits);
 int vnt_mac_reg_bits_on(struct vnt_private *priv, u8 reg_ofs, u8 bits);
-void vnt_mac_write_word(struct vnt_private *priv, u8 reg_ofs, u16 word);
-void vnt_mac_set_bssid_addr(struct vnt_private *priv, u8 *addr);
-void vnt_mac_enable_protect_mode(struct vnt_private *priv);
-void vnt_mac_disable_protect_mode(struct vnt_private *priv);
-void vnt_mac_enable_barker_preamble_mode(struct vnt_private *priv);
-void vnt_mac_disable_barker_preamble_mode(struct vnt_private *priv);
-void vnt_mac_set_beacon_interval(struct vnt_private *priv, u16 interval);
+int vnt_mac_write_word(struct vnt_private *priv, u8 reg_ofs, u16 word);
+int vnt_mac_set_bssid_addr(struct vnt_private *priv, u8 *addr);
+int vnt_mac_enable_protect_mode(struct vnt_private *priv);
+int vnt_mac_disable_protect_mode(struct vnt_private *priv);
+int vnt_mac_enable_barker_preamble_mode(struct vnt_private *priv);
+int vnt_mac_disable_barker_preamble_mode(struct vnt_private *priv);
+int vnt_mac_set_beacon_interval(struct vnt_private *priv, u16 interval);
 int vnt_mac_set_led(struct vnt_private *privpriv, u8 state, u8 led);
 
 #endif /* __MAC_H__ */

drivers/staging/vt6656/power.c

@@ -87,17 +87,23 @@ void vnt_enable_power_saving(struct vnt_private *priv, u16 listen_interval)
  *
  */
 
-void vnt_disable_power_saving(struct vnt_private *priv)
+int vnt_disable_power_saving(struct vnt_private *priv)
 {
+	int ret;
+
 	/* disable power saving hw function */
-	vnt_control_out(priv, MESSAGE_TYPE_DISABLE_PS, 0,
+	ret = vnt_control_out(priv, MESSAGE_TYPE_DISABLE_PS, 0,
 			      0, 0, NULL);
+	if (ret)
+		return ret;
 
 	/* clear AutoSleep */
 	vnt_mac_reg_bits_off(priv, MAC_REG_PSCFG, PSCFG_AUTOSLEEP);
 
 	/* set always listen beacon */
 	vnt_mac_reg_bits_on(priv, MAC_REG_PSCTL, PSCTL_ALBCN);
+
+	return 0;
 }
 
 /*

drivers/staging/vt6656/power.h

@@ -18,7 +18,7 @@
 
 #define C_PWBT	1000 /* micro sec. power up before TBTT */
 
-void vnt_disable_power_saving(struct vnt_private *priv);
+int vnt_disable_power_saving(struct vnt_private *priv);
 void vnt_enable_power_saving(struct vnt_private *priv, u16 listen_interval);
 int vnt_next_tbtt_wakeup(struct vnt_private *priv);