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Re: [RFC][PATCH 2/2] wireless: at76c50x: eliminate hex2str()

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On 06/29/2012 10:58 AM, Andy Shevchenko wrote:
The hex2str() is substituted by '%*pMF' specificator.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
  drivers/net/wireless/at76c50x-usb.c |   54 ++++++++---------------------------
  1 file changed, 12 insertions(+), 42 deletions(-)

diff --git a/drivers/net/wireless/at76c50x-usb.c b/drivers/net/wireless/at76c50x-usb.c
index efc162e..f82f76b 100644
--- a/drivers/net/wireless/at76c50x-usb.c
+++ b/drivers/net/wireless/at76c50x-usb.c
@@ -498,36 +498,6 @@ exit:
  	return ret;
  }

-#define HEX2STR_BUFFERS 4
-#define HEX2STR_MAX_LEN 64
-
-/* Convert binary data into hex string */
-static char *hex2str(void *buf, size_t len)
-{
-	static atomic_t a = ATOMIC_INIT(0);
-	static char bufs[HEX2STR_BUFFERS][3 * HEX2STR_MAX_LEN + 1];
-	char *ret = bufs[atomic_inc_return(&a) & (HEX2STR_BUFFERS - 1)];
-	char *obuf = ret;
-	u8 *ibuf = buf;
-
-	if (len > HEX2STR_MAX_LEN)
-		len = HEX2STR_MAX_LEN;
-
-	if (len == 0)
-		goto exit;
-
-	while (len--) {
-		obuf = hex_byte_pack(obuf, *ibuf++);
-		*obuf++ = '-';
-	}
-	obuf--;
-
-exit:
-	*obuf = '\0';
-
-	return ret;
-}
-
  /* LED trigger */
  static int tx_activity;
  static void at76_ledtrig_tx_timerfunc(unsigned long data);
@@ -1004,9 +974,9 @@ static void at76_dump_mib_mac_wep(struct at76_priv *priv)
  	    WEP_SMALL_KEY_LEN : WEP_LARGE_KEY_LEN;

  	for (i = 0; i < WEP_KEYS; i++)
-		at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: key %d: %s",
+		at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: key %d: %*pMF",
  			 wiphy_name(priv->hw->wiphy), i,
-			 hex2str(m->wep_default_keyvalue[i], key_len));
+			 key_len, m->wep_default_keyvalue[i]);
  exit:
  	kfree(m);
  }
@@ -1031,7 +1001,7 @@ static void at76_dump_mib_mac_mgmt(struct at76_priv *priv)
  	at76_dbg(DBG_MIB, "%s: MIB MAC_MGMT: beacon_period %d CFP_max_duration "
  		 "%d medium_occupancy_limit %d station_id 0x%x ATIM_window %d "
  		 "CFP_mode %d privacy_opt_impl %d DTIM_period %d CFP_period %d "
-		 "current_bssid %pM current_essid %s current_bss_type %d "
+		 "current_bssid %pM current_essid %*pMF current_bss_type %d "
  		 "pm_mode %d ibss_change %d res %d "
  		 "multi_domain_capability_implemented %d "
  		 "international_roaming %d country_string %.3s",
@@ -1041,7 +1011,7 @@ static void at76_dump_mib_mac_mgmt(struct at76_priv *priv)
  		 le16_to_cpu(m->station_id), le16_to_cpu(m->ATIM_window),
  		 m->CFP_mode, m->privacy_option_implemented, m->DTIM_period,
  		 m->CFP_period, m->current_bssid,
-		 hex2str(m->current_essid, IW_ESSID_MAX_SIZE),
+		 IW_ESSID_MAX_SIZE, m->current_essid,
  		 m->current_bss_type, m->power_mgmt_mode, m->ibss_change,
  		 m->res, m->multi_domain_capability_implemented,
  		 m->multi_domain_capability_enabled, m->country_string);
@@ -1069,7 +1039,7 @@ static void at76_dump_mib_mac(struct at76_priv *priv)
  		 "cwmin %d cwmax %d short_retry_time %d long_retry_time %d "
  		 "scan_type %d scan_channel %d probe_delay %u "
  		 "min_channel_time %d max_channel_time %d listen_int %d "
-		 "desired_ssid %s desired_bssid %pM desired_bsstype %d",
+		 "desired_ssid %*pMF desired_bssid %pM desired_bsstype %d",
  		 wiphy_name(priv->hw->wiphy),
  		 le32_to_cpu(m->max_tx_msdu_lifetime),
  		 le32_to_cpu(m->max_rx_lifetime),
@@ -1080,7 +1050,7 @@ static void at76_dump_mib_mac(struct at76_priv *priv)
  		 le16_to_cpu(m->min_channel_time),
  		 le16_to_cpu(m->max_channel_time),
  		 le16_to_cpu(m->listen_interval),
-		 hex2str(m->desired_ssid, IW_ESSID_MAX_SIZE),
+		 IW_ESSID_MAX_SIZE, m->desired_ssid,
  		 m->desired_bssid, m->desired_bsstype);
  exit:
  	kfree(m);
@@ -1160,13 +1130,13 @@ static void at76_dump_mib_mdomain(struct at76_priv *priv)
  		goto exit;
  	}

-	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: channel_list %s",
+	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: channel_list %*pMF",
  		 wiphy_name(priv->hw->wiphy),
-		 hex2str(m->channel_list, sizeof(m->channel_list)));
+		 sizeof(m->channel_list), m->channel_list);

-	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: tx_powerlevel %s",
+	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: tx_powerlevel %*pMF",
  		 wiphy_name(priv->hw->wiphy),
-		 hex2str(m->tx_powerlevel, sizeof(m->tx_powerlevel)));
+		 sizeof(m->tx_powerlevel), m->tx_powerlevel);
  exit:
  	kfree(m);
  }
@@ -1369,9 +1339,9 @@ static int at76_startup_device(struct at76_priv *priv)
  	int ret;

  	at76_dbg(DBG_PARAMS,
-		 "%s param: ssid %.*s (%s) mode %s ch %d wep %s key %d "
+		 "%s param: ssid %.*s (%*pMF) mode %s ch %d wep %s key %d "
  		 "keylen %d", wiphy_name(priv->hw->wiphy), priv->essid_size,
-		 priv->essid, hex2str(priv->essid, IW_ESSID_MAX_SIZE),
+		 priv->essid, IW_ESSID_MAX_SIZE, priv->essid,
  		 priv->iw_mode == IW_MODE_ADHOC ? "adhoc" : "infra",
  		 priv->channel, priv->wep_enabled ? "enabled" : "disabled",
  		 priv->wep_key_id, priv->wep_keys_len[priv->wep_key_id]);


I have not yet tested this patch, but it generates warnings on a 64-bit system as follows:

CC [M]  drivers/net/wireless/at76c50x-usb.o
drivers/net/wireless/at76c50x-usb.c: In function ‘at76_dump_mib_mdomain’:
drivers/net/wireless/at76c50x-usb.c:1133:2: warning: field width specifier ‘*’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat] drivers/net/wireless/at76c50x-usb.c:1137:2: warning: field width specifier ‘*’ expects argument of type ‘int’, but argument 3 has type ‘long unsigned int’ [-Wformat]

Replacing "sizeof" by "(int)sizeof" removes the warning.

Larry


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