diff options
| author | Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com> | 2014-05-27 15:45:45 +0400 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2014-05-29 21:10:29 +0400 |
| commit | fc219eed079eb0b11d93ed1adf4fa58f2b465215 (patch) | |
| tree | 6d68c2202f1a2ec44723e481f50e8d902a0c8502 /drivers/net/wireless/ath/wil6210 | |
| parent | d87bac1b26e81192d7264a73ea11324be80b493c (diff) | |
| download | linux-fc219eed079eb0b11d93ed1adf4fa58f2b465215.tar.xz | |
wil6210: limit fw error recovery attempts
In case there is something fundamentally wrong with the firmware
(example: RF cable disconnected), FW will always crash immediately
after reset. This leads to infinite fw error recovery loop.
Count consecutive unsuccessful error recovery attempts in a short period
of time, and stop doing recovery after some reasonable count.
It is still possible to manually reset fw doing
interface down/up sequence.
Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless/ath/wil6210')
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/main.c | 22 | ||||
| -rw-r--r-- | drivers/net/wireless/ath/wil6210/wil6210.h | 4 |
2 files changed, 25 insertions, 1 deletions
diff --git a/drivers/net/wireless/ath/wil6210/main.c b/drivers/net/wireless/ath/wil6210/main.c index 670cc6de3b4c..f24cb92cc185 100644 --- a/drivers/net/wireless/ath/wil6210/main.c +++ b/drivers/net/wireless/ath/wil6210/main.c @@ -161,12 +161,30 @@ static void wil_fw_error_worker(struct work_struct *work) if (no_fw_recovery) return; + /* increment @recovery_count if less then WIL6210_FW_RECOVERY_TO + * passed since last recovery attempt + */ + if (time_is_after_jiffies(wil->last_fw_recovery + + WIL6210_FW_RECOVERY_TO)) + wil->recovery_count++; + else + wil->recovery_count = 1; /* fw was alive for a long time */ + + if (wil->recovery_count > WIL6210_FW_RECOVERY_RETRIES) { + wil_err(wil, "too many recovery attempts (%d), giving up\n", + wil->recovery_count); + return; + } + + wil->last_fw_recovery = jiffies; + mutex_lock(&wil->mutex); switch (wdev->iftype) { case NL80211_IFTYPE_STATION: case NL80211_IFTYPE_P2P_CLIENT: case NL80211_IFTYPE_MONITOR: - wil_info(wil, "fw error recovery started...\n"); + wil_info(wil, "fw error recovery started (try %d)...\n", + wil->recovery_count); wil_reset(wil); /* need to re-allocate Rx ring after reset */ @@ -249,6 +267,8 @@ int wil_priv_init(struct wil6210_priv *wil) return -EAGAIN; } + wil->last_fw_recovery = jiffies; + return 0; } diff --git a/drivers/net/wireless/ath/wil6210/wil6210.h b/drivers/net/wireless/ath/wil6210/wil6210.h index 3427ac4a4fa1..f8c598ebd9ee 100644 --- a/drivers/net/wireless/ath/wil6210/wil6210.h +++ b/drivers/net/wireless/ath/wil6210/wil6210.h @@ -40,6 +40,8 @@ static inline u32 WIL_GET_BITS(u32 x, int b0, int b1) #define WIL6210_MAX_CID (8) /* HW limit */ #define WIL6210_NAPI_BUDGET (16) /* arbitrary */ #define WIL6210_ITR_TRSH (10000) /* arbitrary - about 15 IRQs/msec */ +#define WIL6210_FW_RECOVERY_RETRIES (5) /* try to recover this many times */ +#define WIL6210_FW_RECOVERY_TO msecs_to_jiffies(5000) /* Hardware definitions begin */ @@ -361,6 +363,8 @@ struct wil6210_priv { u32 fw_version; u32 hw_version; u8 n_mids; /* number of additional MIDs as reported by FW */ + int recovery_count; /* num of FW recovery attempts in a short time */ + unsigned long last_fw_recovery; /* jiffies of last fw recovery */ /* profile */ u32 monitor_flags; u32 secure_pcp; /* create secure PCP? */ |