ath6kl: Recover from "wmi ctrl ep is full" condition

In some error conditions, fw pauses HTC pipes which would
result in control endpoint full condition. When we hit this
case, most of the time the device will be unusable. Re-initialize
the target to recover from this situation.

Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

diff --git a/drivers/net/wireless/ath/ath6kl/core.h b/drivers/net/wireless/ath/ath6kl/core.h
index b2cbecf6cfe5bf8afeb0dd51fd48f2b86ccf810f..ac90b31514bdd806a340dc9fb80955c006d4f979 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/core.h
+++ b/drivers/net/wireless/ath/ath6kl/core.h
@@ -660,6 +660,7 @@ enum ath6kl_state {
 enum ath6kl_fw_err {
        ATH6KL_FW_ASSERT,
        ATH6KL_FW_HB_RESP_FAILURE,
+       ATH6KL_FW_EP_FULL,
 };
 
 struct ath6kl {

diff --git a/drivers/net/wireless/ath/ath6kl/recovery.c b/drivers/net/wireless/ath/ath6kl/recovery.c
index 4e3f205bb8a096f61a6986ca965949b5de744d4e..03edeb8c2ce3161b5ce451b5be0e500f7028444e 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/recovery.c
+++ b/drivers/net/wireless/ath/ath6kl/recovery.c
@@ -30,6 +30,8 @@ static void ath6kl_recovery_work(struct work_struct *work)
        ath6kl_init_hw_restart(ar);
 
        ar->state = ATH6KL_STATE_ON;
+       clear_bit(WMI_CTRL_EP_FULL, &ar->flag);
+
        ar->fw_recovery.err_reason = 0;
 
        if (ar->fw_recovery.enable)

diff --git a/drivers/net/wireless/ath/ath6kl/txrx.c b/drivers/net/wireless/ath/ath6kl/txrx.c
index cbe1a9d891123119e7591d875f280e99801a186d..e867193373fe25fcd4e20a499c24b436ad744cd8 100644 (file)
--- a/drivers/net/wireless/ath/ath6kl/txrx.c
+++ b/drivers/net/wireless/ath/ath6kl/txrx.c
@@ -594,6 +594,7 @@ enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
                 */
                set_bit(WMI_CTRL_EP_FULL, &ar->flag);
                ath6kl_err("wmi ctrl ep is full\n");
+               ath6kl_recovery_err_notify(ar, ATH6KL_FW_EP_FULL);
                return action;
        }