mirrors
/
linux-stable
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
1
0
Fork 0
Code Issues Releases Wiki Activity

cfg80211: simplify cfg80211_chandef_valid() 

There are a lot of duplicate checks in this function to
check the delta between the control channel and CF1.
With the addition of 320 MHz, this will become even more.
Simplify the code so that the common checks are done
only once for multiple bandwidths.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://lore.kernel.org/r/iwlwifi.20211129152938.2d0240b07f11.I759e8e990f5386ba2b56ffb2488a8d4e16e22c1b@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2021-11-29 15:32:43 +02:00
parent cee04f3c3a
commit 3bb1ccc4ed
1 changed files with 32 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

62
net/wireless/chan.c
View File

@ -245,19 +245,7 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
oper_freq - MHZ_TO_KHZ(oper_width) / 2)
return false;
break;
case NL80211_CHAN_WIDTH_40:
if (chandef->center_freq1 != control_freq + 10 &&
chandef->center_freq1 != control_freq - 10)
return false;
if (chandef->center_freq2)
return false;
break;
case NL80211_CHAN_WIDTH_80P80:
if (chandef->center_freq1 != control_freq + 30 &&
chandef->center_freq1 != control_freq + 10 &&
chandef->center_freq1 != control_freq - 10 &&
chandef->center_freq1 != control_freq - 30)
return false;
if (!chandef->center_freq2)
return false;
/* adjacent is not allowed -- that's a 160 MHz channel */
@ -265,28 +253,42 @@ bool cfg80211_chandef_valid(const struct cfg80211_chan_def *chandef)
chandef->center_freq2 - chandef->center_freq1 == 80)
return false;
break;
case NL80211_CHAN_WIDTH_80:
if (chandef->center_freq1 != control_freq + 30 &&
chandef->center_freq1 != control_freq + 10 &&
chandef->center_freq1 != control_freq - 10 &&
chandef->center_freq1 != control_freq - 30)
return false;
default:
if (chandef->center_freq2)
return false;
break;
}
switch (chandef->width) {
case NL80211_CHAN_WIDTH_5:
case NL80211_CHAN_WIDTH_10:
case NL80211_CHAN_WIDTH_20:
case NL80211_CHAN_WIDTH_20_NOHT:
case NL80211_CHAN_WIDTH_1:
case NL80211_CHAN_WIDTH_2:
case NL80211_CHAN_WIDTH_4:
case NL80211_CHAN_WIDTH_8:
case NL80211_CHAN_WIDTH_16:
/* all checked above */
break;
case NL80211_CHAN_WIDTH_160:
if (chandef->center_freq1 != control_freq + 70 &&
chandef->center_freq1 != control_freq + 50 &&
chandef->center_freq1 != control_freq + 30 &&
chandef->center_freq1 != control_freq + 10 &&
chandef->center_freq1 != control_freq - 10 &&
chandef->center_freq1 != control_freq - 30 &&
chandef->center_freq1 != control_freq - 50 &&
chandef->center_freq1 != control_freq - 70)
return false;
if (chandef->center_freq2)
return false;
break;
if (chandef->center_freq1 == control_freq + 70 ||
chandef->center_freq1 == control_freq + 50 ||
chandef->center_freq1 == control_freq - 50 ||
chandef->center_freq1 == control_freq - 70)
break;
fallthrough;
case NL80211_CHAN_WIDTH_80P80:
case NL80211_CHAN_WIDTH_80:
if (chandef->center_freq1 == control_freq + 30 ||
chandef->center_freq1 == control_freq - 30)
break;
fallthrough;
case NL80211_CHAN_WIDTH_40:
if (chandef->center_freq1 == control_freq + 10 ||
chandef->center_freq1 == control_freq - 10)
break;
fallthrough;
default:
return false;
}