Return-path: Received: from wolverine02.qualcomm.com ([199.106.114.251]:41656 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752718AbcA1R5M (ORCPT ); Thu, 28 Jan 2016 12:57:12 -0500 Cc: Vladimir Kondratiev , linux-wireless@vger.kernel.org, wil6210@qca.qualcomm.com, Maya Erez From: Maya Erez To: Kalle Valo Subject: [PATCH 2/4] wil6210: wait for disconnect completion Date: Thu, 28 Jan 2016 19:24:03 +0200 Message-Id: <1454001845-28414-3-git-send-email-qca_merez@qca.qualcomm.com> (sfid-20160128_185716_366326_EC11118F) In-Reply-To: <1454001845-28414-1-git-send-email-qca_merez@qca.qualcomm.com> References: <1454001845-28414-1-git-send-email-qca_merez@qca.qualcomm.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: From: Vladimir Kondratiev cfg80211_ops.disconnect() should wait for disconnect flow to complete. If it does not, internal state becomes out of sync with one in cfg80211. If one does stress test connect/disconnect sequence, cfg80211 will issue next connect before disconnect completed internally. Signed-off-by: Vladimir Kondratiev Signed-off-by: Maya Erez --- drivers/net/wireless/ath/wil6210/cfg80211.c | 13 ++++++++++++- drivers/net/wireless/ath/wil6210/main.c | 28 +++++++++------------------- drivers/net/wireless/ath/wil6210/wil6210.h | 1 + 3 files changed, 22 insertions(+), 20 deletions(-) diff --git a/drivers/net/wireless/ath/wil6210/cfg80211.c b/drivers/net/wireless/ath/wil6210/cfg80211.c index 774352f..97ad91e 100644 --- a/drivers/net/wireless/ath/wil6210/cfg80211.c +++ b/drivers/net/wireless/ath/wil6210/cfg80211.c @@ -535,7 +535,18 @@ static int wil_cfg80211_disconnect(struct wiphy *wiphy, wil_dbg_misc(wil, "%s(reason=%d)\n", __func__, reason_code); - rc = wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0); + if (!(test_bit(wil_status_fwconnecting, wil->status) || + test_bit(wil_status_fwconnected, wil->status))) { + wil_err(wil, "%s: Disconnect was called while disconnected\n", + __func__); + return 0; + } + + rc = wmi_call(wil, WMI_DISCONNECT_CMDID, NULL, 0, + WMI_DISCONNECT_EVENTID, NULL, 0, + WIL6210_DISCONNECT_TO_MS); + if (rc) + wil_err(wil, "%s: disconnect error %d\n", __func__, rc); return rc; } diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c index 712ebbf..78ba6e0 100644 --- a/drivers/net/wireless/ath/wil6210/main.c +++ b/drivers/net/wireless/ath/wil6210/main.c @@ -23,9 +23,6 @@ #include "wmi.h" #include "boot_loader.h" -#define WAIT_FOR_DISCONNECT_TIMEOUT_MS 2000 -#define WAIT_FOR_DISCONNECT_INTERVAL_MS 10 - bool debug_fw; /* = false; */ module_param(debug_fw, bool, S_IRUGO); MODULE_PARM_DESC(debug_fw, " do not perform card reset. For FW debug"); @@ -942,8 +939,7 @@ int wil_up(struct wil6210_priv *wil) int __wil_down(struct wil6210_priv *wil) { - int iter = WAIT_FOR_DISCONNECT_TIMEOUT_MS / - WAIT_FOR_DISCONNECT_INTERVAL_MS; + int rc; WARN_ON(!mutex_is_locked(&wil->mutex)); @@ -967,22 +963,16 @@ int __wil_down(struct wil6210_priv *wil) } if (test_bit(wil_status_fwconnected, wil->status) || - test_bit(wil_status_fwconnecting, wil->status)) - wmi_send(wil, WMI_DISCONNECT_CMDID, NULL, 0); + test_bit(wil_status_fwconnecting, wil->status)) { - /* make sure wil is idle (not connected) */ - mutex_unlock(&wil->mutex); - while (iter--) { - int idle = !test_bit(wil_status_fwconnected, wil->status) && - !test_bit(wil_status_fwconnecting, wil->status); - if (idle) - break; - msleep(WAIT_FOR_DISCONNECT_INTERVAL_MS); + mutex_unlock(&wil->mutex); + rc = wmi_call(wil, WMI_DISCONNECT_CMDID, NULL, 0, + WMI_DISCONNECT_EVENTID, NULL, 0, + WIL6210_DISCONNECT_TO_MS); + mutex_lock(&wil->mutex); + if (rc) + wil_err(wil, "timeout waiting for disconnect\n"); } - mutex_lock(&wil->mutex); - - if (iter < 0) - wil_err(wil, "timeout waiting for idle FW/HW\n"); wil_reset(wil, false); diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h index 1b8fa1d..9502965 100644 --- a/drivers/net/wireless/ath/wil6210/wil6210.h +++ b/drivers/net/wireless/ath/wil6210/wil6210.h @@ -92,6 +92,7 @@ static inline u32 wil_mtu2macbuf(u32 mtu) #define WIL6210_FW_RECOVERY_RETRIES (5) /* try to recover this many times */ #define WIL6210_FW_RECOVERY_TO msecs_to_jiffies(5000) #define WIL6210_SCAN_TO msecs_to_jiffies(10000) +#define WIL6210_DISCONNECT_TO_MS (2000) #define WIL6210_RX_HIGH_TRSH_INIT (0) #define WIL6210_RX_HIGH_TRSH_DEFAULT \ (1 << (WIL_RX_RING_SIZE_ORDER_DEFAULT - 3)) -- 1.8.5.2