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Date: Tue, 15 Dec 2020 22:51:33 +0530 From: Youghandhar Chintala <youghand@...eaurora.org> To: johannes@...solutions.net Cc: davem@...emloft.net, kuba@...nel.org, linux-wireless@...r.kernel.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, kuabhs@...omium.org, dianders@...omium.org, briannorris@...omium.org, pillair@...eaurora.org, Youghandhar Chintala <youghand@...eaurora.org> Subject: [PATCH 1/3] cfg80211: Add wiphy flag to trigger STA disconnect after hardware restart 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@...eaurora.org> --- 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
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