On 10/18/2018 10:35 AM, Johannes Berg wrote:
From: Johannes Berg <johannes.berg@xxxxxxxxx>
In some cases, like in the rsi driver hardware scan offload, there
may be scenarios in which hardware scan might not be available or
desirable.
Allow drivers to cope with this by letting them fall back to software
scan by returning the special value 1 from the hardware scan method.
Requested-by: Sushant Kumar Mishra <sushant2k1513@xxxxxxxxx>
Requested-by: Siva Rebbagondla <siva.rebbagondla@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
include/net/mac80211.h | 5 +++++
net/mac80211/scan.c | 22 ++++++++++++++++++----
2 files changed, 23 insertions(+), 4 deletions(-)
diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 71985e95d2d9..4631b3b6fc37 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3239,6 +3239,11 @@ enum ieee80211_reconfig_type {
* When the scan finishes, ieee80211_scan_completed() must be called;
* note that it also must be called when the scan cannot finish due to
* any error unless this callback returned a negative error code.
+ * This callback is also allowed to return the special return value 1,
+ * this indicates that hardware scan isn't desirable right now and a
+ * software scan should be done instead. A driver wishing to use this
+ * capability must ensure its (hardware) scan capabilities aren't
+ * advertised as more capable than mac80211's software scan is.
Hi Johannes,
Not sure what is meant by the last sentence. What does "more capable"
mean? What are (or where to find) the mac80211 software scan capabilities?
Regards,
Arend
