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cfg80211: document sched_scan_stop synchronous behaviour 

Due to userspace assumptions, the sched_scan_stop operation must
be synchronous, i.e. once it returns a new scheduled scan must be
able to start immediately. Document this in the API.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2014-02-13 17:16:10 +01:00
parent df942e7ba7
commit d9b8396a52
2 changed files with 9 additions and 3 deletions
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7
include/net/cfg80211.h
View File

@ -2206,7 +2206,12 @@ struct cfg80211_qos_map {
* @set_cqm_txe_config: Configure connection quality monitor TX error
* thresholds.
* @sched_scan_start: Tell the driver to start a scheduled scan.
* @sched_scan_stop: Tell the driver to stop an ongoing scheduled scan.
* @sched_scan_stop: Tell the driver to stop an ongoing scheduled scan. This
* call must stop the scheduled scan and be ready for starting a new one
* before it returns, i.e. @sched_scan_start may be called immediately
* after that again and should not fail in that case. The driver should
* not call cfg80211_sched_scan_stopped() for a requested stop (when this
* method returns 0.)
*
* @mgmt_frame_register: Notify driver that a management frame type was
* registered. Note that this callback may not sleep, and cannot run

5
include/uapi/linux/nl80211.h
View File

@ -303,8 +303,9 @@
* passed, all channels allowed for the current regulatory domain
* are used. Extra IEs can also be passed from the userspace by
* using the %NL80211_ATTR_IE attribute.
* @NL80211_CMD_STOP_SCHED_SCAN: stop a scheduled scan. Returns -ENOENT
* if scheduled scan is not running.
* @NL80211_CMD_STOP_SCHED_SCAN: stop a scheduled scan. Returns -ENOENT if
* scheduled scan is not running. The caller may assume that as soon
* as the call returns, it is safe to start a new scheduled scan again.
* @NL80211_CMD_SCHED_SCAN_RESULTS: indicates that there are scheduled scan
* results available.
* @NL80211_CMD_SCHED_SCAN_STOPPED: indicates that the scheduled scan has