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authorJohannes Berg <johannes.berg@intel.com>2021-11-29 16:32:43 +0300
committerJohannes Berg <johannes.berg@intel.com>2021-12-20 12:36:24 +0300
commit3bb1ccc4ed8fbc2d26a0cce369313e80e412b4f1 (patch)
treec694d58e94bcd02286f380f3e490838d26c69842 /net/wireless/chan.c
parentcee04f3c3a00ffd2a2a6ed1028e0ab58a3a28d25 (diff)
downloadlinux-3bb1ccc4ed8fbc2d26a0cce369313e80e412b4f1.tar.xz
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>
Diffstat (limited to 'net/wireless/chan.c')
-rw-r--r--net/wireless/chan.c62
1 files changed, 32 insertions, 30 deletions
diff --git a/net/wireless/chan.c b/net/wireless/chan.c
index 00fc7b78063c..ac2e5677524a 100644
--- a/net/wireless/chan.c
+++ b/net/wireless/chan.c
@@ -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;
- 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;
+ }
+
+ 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 - 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;
}