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mac80211: remove HW_SIGNAL_DB 

Giving the signal in dB isn't much more useful to userspace
than giving the signal in unspecified units. This removes
some radiotap information for zd1211 (the only driver using
this flag), but it helps a lot for getting cfg80211-based
scanning which won't support dB, and zd1211 being dB is a
little fishy anyway.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Cc: Bruno Randolf <bruno@thinktube.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg 2009-01-30 11:13:06 +01:00 committed by John W. Linville
parent 7a7dec6562
commit 7fee5372d8
5 changed files with 11 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/net/wireless/zd1211rw/zd_mac.c
View File

@ -967,7 +967,7 @@ struct ieee80211_hw *zd_mac_alloc_hw(struct usb_interface *intf)
hw->wiphy->bands[IEEE80211_BAND_2GHZ] = &mac->band;
hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
IEEE80211_HW_SIGNAL_DB;
IEEE80211_HW_SIGNAL_UNSPEC;
hw->wiphy->interface_modes =
BIT(NL80211_IFTYPE_MESH_POINT) |

22
include/net/mac80211.h
View File

@ -860,11 +860,6 @@ enum ieee80211_tkip_key_type {
* expect values between 0 and @max_signal.
* If possible please provide dB or dBm instead.
*
* @IEEE80211_HW_SIGNAL_DB:
* Hardware gives signal values in dB, decibel difference from an
* arbitrary, fixed reference. We expect values between 0 and @max_signal.
* If possible please provide dBm instead.
*
* @IEEE80211_HW_SIGNAL_DBM:
* Hardware gives signal values in dBm, decibel difference from
* one milliwatt. This is the preferred method since it is standardized
@ -900,15 +895,14 @@ enum ieee80211_hw_flags {
IEEE80211_HW_2GHZ_SHORT_SLOT_INCAPABLE = 1<<3,
IEEE80211_HW_2GHZ_SHORT_PREAMBLE_INCAPABLE = 1<<4,
IEEE80211_HW_SIGNAL_UNSPEC = 1<<5,
IEEE80211_HW_SIGNAL_DB = 1<<6,
IEEE80211_HW_SIGNAL_DBM = 1<<7,
IEEE80211_HW_NOISE_DBM = 1<<8,
IEEE80211_HW_SPECTRUM_MGMT = 1<<9,
IEEE80211_HW_AMPDU_AGGREGATION = 1<<10,
IEEE80211_HW_SUPPORTS_PS = 1<<11,
IEEE80211_HW_PS_NULLFUNC_STACK = 1<<12,
IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<13,
IEEE80211_HW_MFP_CAPABLE = 1<<14,
IEEE80211_HW_SIGNAL_DBM = 1<<6,
IEEE80211_HW_NOISE_DBM = 1<<7,
IEEE80211_HW_SPECTRUM_MGMT = 1<<8,
IEEE80211_HW_AMPDU_AGGREGATION = 1<<9,
IEEE80211_HW_SUPPORTS_PS = 1<<10,
IEEE80211_HW_PS_NULLFUNC_STACK = 1<<11,
IEEE80211_HW_SUPPORTS_DYNAMIC_PS = 1<<12,
IEEE80211_HW_MFP_CAPABLE = 1<<13,
};
/**

1
net/mac80211/main.c
View File

@ -884,7 +884,6 @@ int ieee80211_register_hw(struct ieee80211_hw *hw)
local->hw.conf.listen_interval = local->hw.max_listen_interval;
local->wstats_flags |= local->hw.flags & (IEEE80211_HW_SIGNAL_UNSPEC |
IEEE80211_HW_SIGNAL_DB |
IEEE80211_HW_SIGNAL_DBM) ?
IW_QUAL_QUAL_UPDATED : IW_QUAL_QUAL_INVALID;
local->wstats_flags |= local->hw.flags & IEEE80211_HW_NOISE_DBM ?

11
net/mac80211/rx.c
View File

@ -86,8 +86,7 @@ ieee80211_rx_radiotap_len(struct ieee80211_local *local,
if (status->flag & RX_FLAG_TSFT)
len += 8;
if (local->hw.flags & IEEE80211_HW_SIGNAL_DB ||
local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
len += 1;
if (local->hw.flags & IEEE80211_HW_NOISE_DBM)
len += 1;
@ -199,14 +198,6 @@ ieee80211_add_rx_radiotap_header(struct ieee80211_local *local,
*pos = status->antenna;
pos++;
/* IEEE80211_RADIOTAP_DB_ANTSIGNAL */
if (local->hw.flags & IEEE80211_HW_SIGNAL_DB) {
*pos = status->signal;
rthdr->it_present |=
cpu_to_le32(1 << IEEE80211_RADIOTAP_DB_ANTSIGNAL);
pos++;
}
/* IEEE80211_RADIOTAP_DB_ANTNOISE is not used */
/* IEEE80211_RADIOTAP_RX_FLAGS */

3
net/mac80211/wext.c
View File

@ -173,8 +173,7 @@ static int ieee80211_ioctl_giwrange(struct net_device *dev,
range->num_encoding_sizes = 2;
range->max_encoding_tokens = NUM_DEFAULT_KEYS;
if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC ||
local->hw.flags & IEEE80211_HW_SIGNAL_DB)
if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC)
range->max_qual.level = local->hw.max_signal;
else if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM)
range->max_qual.level = -110;