From: Raja Mani <rmani@xxxxxxxxxxxxxxxx>
Below two scenarios are taken care in this patch which helped
to fix the firmware crash during wow suspend/resume.
* TX operation (ctrl tx and data tx) has to be controlled based
on suspend state. i.e, with respect to WOW mode, control packets
are allowed to send from the host until the suspend state goes
ATH6KL_STATE_WOW and the data packets are allowed until WOW
suspend operation starts.
* Similarly, wow resume is NOT allowed if WOW suspend is in progress.
Signed-off-by: Raja Mani <rmani@xxxxxxxxxxxxxxxx>
---
V3:
* netif queue stop call is moved from ath6kl_data_tx
to ath6kl_wow_suspend handler.
* Switch cases are added for new ATH6KL_STATE_RESUMING
and ATH6KL_STATE_SUSPENDING in ath6kl_sdio_resume.
* Added WARN_ON_ONCE() for the condition we check ar->state in
ath6kl_control_tx
V2:
* Separate wow sub state introduced in V1 is removed and common
states (ATH6KL_STATE_SUSPENDING and ATH6KL_STATE_RESUMING)
are added in enum ath6kl_state.
* netdev queue is stopped while dropping skb in ath6kl_data_tx()
and resumed back in ath6kl_wow_resume().
drivers/net/wireless/ath/ath6kl/cfg80211.c | 27 +++++++++++++++++++++++++--
drivers/net/wireless/ath/ath6kl/core.h | 2 ++
drivers/net/wireless/ath/ath6kl/sdio.c | 7 +++++++
drivers/net/wireless/ath/ath6kl/txrx.c | 8 ++++++++
4 files changed, 42 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/ath/ath6kl/cfg80211.c b/drivers/net/wireless/ath/ath6kl/cfg80211.c
index 9abc7a6..9915fc3 100644
--- a/drivers/net/wireless/ath/ath6kl/cfg80211.c
+++ b/drivers/net/wireless/ath/ath6kl/cfg80211.c
@@ -1948,6 +1948,10 @@ static int ath6kl_wow_suspend(struct ath6kl *ar, struct cfg80211_wowlan *wow)
if (ret)
return ret;
+ netif_stop_queue(vif->ndev);
+
+ ar->state = ATH6KL_STATE_SUSPENDING;
+
/* Setup own IP addr for ARP agent. */
in_dev = __in_dev_get_rtnl(vif->ndev);
if (!in_dev)
@@ -2026,15 +2030,29 @@ static int ath6kl_wow_resume(struct ath6kl *ar)
if (!vif)
return -EIO;
+ ar->state = ATH6KL_STATE_RESUMING;
+
ret = ath6kl_wmi_set_host_sleep_mode_cmd(ar->wmi, vif->fw_vif_idx,
ATH6KL_HOST_MODE_AWAKE);
- return ret;
+ if (ret) {
+ ath6kl_warn("Failed to configure host sleep mode for "
+ "wow resume: %d\n", ret);
+ ar->state = ATH6KL_STATE_WOW;
+ return ret;
+ }
+
+ ar->state = ATH6KL_STATE_ON;
+
+ netif_wake_queue(vif->ndev);
+
+ return 0;
}
int ath6kl_cfg80211_suspend(struct ath6kl *ar,
enum ath6kl_cfg_suspend_mode mode,
struct cfg80211_wowlan *wow)
{
+ enum ath6kl_state prev_state;
int ret;
switch (mode) {
@@ -2045,8 +2063,11 @@ int ath6kl_cfg80211_suspend(struct ath6kl *ar,
/* Flush all non control pkts in TX path */
ath6kl_tx_data_cleanup(ar);
+ prev_state = ar->state;
+
ret = ath6kl_wow_suspend(ar, wow);
if (ret) {
+ ar->state = prev_state;
ath6kl_err("wow suspend failed: %d\n", ret);
return ret;
}
@@ -2121,7 +2142,6 @@ int ath6kl_cfg80211_resume(struct ath6kl *ar)
return ret;
}
- ar->state = ATH6KL_STATE_ON;
break;
case ATH6KL_STATE_DEEPSLEEP:
@@ -2195,6 +2215,9 @@ static int __ath6kl_cfg80211_resume(struct wiphy *wiphy)
*/
void ath6kl_check_wow_status(struct ath6kl *ar)
{
+ if (ar->state == ATH6KL_STATE_SUSPENDING)
+ return;
+
if (ar->state == ATH6KL_STATE_WOW)
ath6kl_cfg80211_resume(ar);
}
diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index b6bdece..180ba97 100644
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -537,6 +537,8 @@ enum ath6kl_dev_state {
enum ath6kl_state {
ATH6KL_STATE_OFF,
ATH6KL_STATE_ON,
+ ATH6KL_STATE_SUSPENDING,
+ ATH6KL_STATE_RESUMING,
ATH6KL_STATE_DEEPSLEEP,
ATH6KL_STATE_CUTPOWER,
ATH6KL_STATE_WOW,
diff --git a/drivers/net/wireless/ath/ath6kl/sdio.c b/drivers/net/wireless/ath/ath6kl/sdio.c
index e2f42a1..cb94e67 100644
--- a/drivers/net/wireless/ath/ath6kl/sdio.c
+++ b/drivers/net/wireless/ath/ath6kl/sdio.c
@@ -924,8 +924,15 @@ static int ath6kl_sdio_resume(struct ath6kl *ar)
case ATH6KL_STATE_WOW:
break;
+
case ATH6KL_STATE_SCHED_SCAN:
break;
+
+ case ATH6KL_STATE_SUSPENDING:
+ break;
+
+ case ATH6KL_STATE_RESUMING:
+ break;
}
ath6kl_cfg80211_resume(ar);
diff --git a/drivers/net/wireless/ath/ath6kl/txrx.c b/drivers/net/wireless/ath/ath6kl/txrx.c
index 6754441..b05f353 100644
--- a/drivers/net/wireless/ath/ath6kl/txrx.c
+++ b/drivers/net/wireless/ath/ath6kl/txrx.c
@@ -285,6 +285,9 @@ int ath6kl_control_tx(void *devt, struct sk_buff *skb,
int status = 0;
struct ath6kl_cookie *cookie = NULL;
+ if (WARN_ON_ONCE(ar->state == ATH6KL_STATE_WOW))
+ return -EACCES;
+
spin_lock_bh(&ar->lock);
ath6kl_dbg(ATH6KL_DBG_WLAN_TX,
@@ -360,6 +363,11 @@ int ath6kl_data_tx(struct sk_buff *skb, struct net_device *dev)
return 0;
}
+ if (WARN_ON_ONCE(ar->state != ATH6KL_STATE_ON)) {
+ dev_kfree_skb(skb);
+ return 0;
+ }
+
if (!test_bit(WMI_READY, &ar->flag))
goto fail_tx;
--
1.7.1
--
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