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ACS: Simplify code paths

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This removes some unnecessarily duplicated return paths and simplifies
code paths.

Signed-off-by: Jouni Malinen <j@w1.fi>
This commit is contained in:
Jouni Malinen 2017-03-04 13:22:46 +02:00
parent 9960434dcf
commit 29be2c090e
1 changed files with 13 additions and 31 deletions
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44
src/ap/acs.c
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@ -331,10 +331,8 @@ acs_survey_chan_interference_factor(struct hostapd_iface *iface,
long double int_factor = 0; long double int_factor = 0;
unsigned count = 0; unsigned count = 0;
if (dl_list_empty(&chan->survey_list)) if (dl_list_empty(&chan->survey_list) ||
return; (chan->flag & HOSTAPD_CHAN_DISABLED))
if (chan->flag & HOSTAPD_CHAN_DISABLED)
return; return;
chan->interference_factor = 0; chan->interference_factor = 0;
@ -359,9 +357,8 @@ acs_survey_chan_interference_factor(struct hostapd_iface *iface,
(unsigned long) survey->channel_time_rx); (unsigned long) survey->channel_time_rx);
} }
if (!count) if (count)
return; chan->interference_factor /= count;
chan->interference_factor /= count;
} }
@ -450,13 +447,9 @@ static int acs_surveys_are_sufficient(struct hostapd_iface *iface)
for (i = 0; i < iface->current_mode->num_channels; i++) { for (i = 0; i < iface->current_mode->num_channels; i++) {
chan = &iface->current_mode->channels[i]; chan = &iface->current_mode->channels[i];
if (chan->flag & HOSTAPD_CHAN_DISABLED) if (!(chan->flag & HOSTAPD_CHAN_DISABLED) &&
continue; acs_survey_list_is_sufficient(chan))
valid++;
if (!acs_survey_list_is_sufficient(chan))
continue;
valid++;
} }
/* We need at least survey data for one channel */ /* We need at least survey data for one channel */
@ -466,13 +459,9 @@ static int acs_surveys_are_sufficient(struct hostapd_iface *iface)
static int acs_usable_chan(struct hostapd_channel_data *chan) static int acs_usable_chan(struct hostapd_channel_data *chan)
{ {
if (dl_list_empty(&chan->survey_list)) return !dl_list_empty(&chan->survey_list) &&
return 0; !(chan->flag & HOSTAPD_CHAN_DISABLED) &&
if (chan->flag & HOSTAPD_CHAN_DISABLED) acs_survey_list_is_sufficient(chan);
return 0;
if (!acs_survey_list_is_sufficient(chan))
return 0;
return 1;
} }
@ -788,10 +777,7 @@ static int acs_study_survey_based(struct hostapd_iface *iface)
static int acs_study_options(struct hostapd_iface *iface) static int acs_study_options(struct hostapd_iface *iface)
{ {
int err; if (acs_study_survey_based(iface) == 0)
err = acs_study_survey_based(iface);
if (err == 0)
return 0; return 0;
/* TODO: If no surveys are available/sufficient this is a good /* TODO: If no surveys are available/sufficient this is a good
@ -920,14 +906,11 @@ static int acs_request_scan(struct hostapd_iface *iface)
enum hostapd_chan_status acs_init(struct hostapd_iface *iface) enum hostapd_chan_status acs_init(struct hostapd_iface *iface)
{ {
int err;
wpa_printf(MSG_INFO, "ACS: Automatic channel selection started, this may take a bit"); wpa_printf(MSG_INFO, "ACS: Automatic channel selection started, this may take a bit");
if (iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) { if (iface->drv_flags & WPA_DRIVER_FLAGS_ACS_OFFLOAD) {
wpa_printf(MSG_INFO, "ACS: Offloading to driver"); wpa_printf(MSG_INFO, "ACS: Offloading to driver");
err = hostapd_drv_do_acs(iface->bss[0]); if (hostapd_drv_do_acs(iface->bss[0]))
if (err)
return HOSTAPD_CHAN_INVALID; return HOSTAPD_CHAN_INVALID;
return HOSTAPD_CHAN_ACS; return HOSTAPD_CHAN_ACS;
} }
@ -937,8 +920,7 @@ enum hostapd_chan_status acs_init(struct hostapd_iface *iface)
acs_cleanup(iface); acs_cleanup(iface);
err = acs_request_scan(iface); if (acs_request_scan(iface) < 0)
if (err < 0)
return HOSTAPD_CHAN_INVALID; return HOSTAPD_CHAN_INVALID;
hostapd_set_state(iface, HAPD_IFACE_ACS); hostapd_set_state(iface, HAPD_IFACE_ACS);