Many wifi drivers (e.g. ath10k using qualcomm wifi chipsets)
support silent target hardware restart/recovery. Out of these
drivers which support target hw restart, certain chipsets
have the wifi mac sequence number addition for transmitted
frames done by the firmware. For such chipsets, a silent
target hardware restart breaks the continuity of the wifi
mac sequence number, since the wifi mac sequence number
restarts from 0 after the restart, which in-turn leads
to the peer access point dropping all the frames from device
until it receives the frame with the mac sequence which was
expected by the AP.
Add a wiphy flag for the driver to indicate that it needs a
trigger for STA disconnect after hardware restart.
Tested on ath10k using WCN3990, QCA6174.
Signed-off-by: Youghandhar Chintala <youghand@xxxxxxxxxxxxxx>
---
include/net/cfg80211.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index ab249ca..7fba6f6 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -4311,6 +4311,9 @@ struct cfg80211_ops {
* @WIPHY_FLAG_HAS_STATIC_WEP: The device supports static WEP key installation
* before connection.
* @WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK: The device supports bigger kek and kck keys
+ * @WIPHY_FLAG_STA_DISCONNECT_ON_HW_RESTART: The device needs a trigger to
+ * disconnect STA after target hardware restart. This flag should be
+ * exposed by drivers which support target recovery.
*/
enum wiphy_flags {
WIPHY_FLAG_SUPPORTS_EXT_KEK_KCK = BIT(0),
@@ -4337,6 +4340,7 @@ enum wiphy_flags {
WIPHY_FLAG_SUPPORTS_5_10_MHZ = BIT(22),
WIPHY_FLAG_HAS_CHANNEL_SWITCH = BIT(23),
WIPHY_FLAG_HAS_STATIC_WEP = BIT(24),
+ WIPHY_FLAG_STA_DISCONNECT_ON_HW_RESTART = BIT(25),
};
/**
--
2.7.4
