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ath10k: fix ath10k_debug_start() locking 

ath10k_debug_start() was not called with conf_mutex, fix that. Also there was a
deadlock in ath10k_debug_stop(), rename it to ath10k_debug_destroy() and call
it only when the device is destroyed.

Reported-by: Mohammed Shafi Shajakhan <mohammed@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Kalle Valo 2013-10-08 21:45:25 +03:00
parent a24b88b560
commit 60631c5c10
3 changed files with 31 additions and 1 deletions
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12
drivers/net/wireless/ath/ath10k/core.c
View File

@ -737,6 +737,8 @@ EXPORT_SYMBOL(ath10k_core_create);
void ath10k_core_destroy(struct ath10k *ar)
{
ath10k_debug_destroy(ar);
flush_workqueue(ar->workqueue);
destroy_workqueue(ar->workqueue);
@ -748,6 +750,8 @@ int ath10k_core_start(struct ath10k *ar)
{
int status;
lockdep_assert_held(&ar->conf_mutex);
ath10k_bmi_start(ar);
if (ath10k_init_configure_target(ar)) {
@ -836,6 +840,8 @@ EXPORT_SYMBOL(ath10k_core_start);
void ath10k_core_stop(struct ath10k *ar)
{
lockdep_assert_held(&ar->conf_mutex);
ath10k_debug_stop(ar);
ath10k_htc_stop(&ar->htc);
ath10k_htt_detach(&ar->htt);
@ -883,15 +889,21 @@ static int ath10k_core_probe_fw(struct ath10k *ar)
return ret;
}
mutex_lock(&ar->conf_mutex);
ret = ath10k_core_start(ar);
if (ret) {
ath10k_err("could not init core (%d)\n", ret);
ath10k_core_free_firmware_files(ar);
ath10k_hif_power_down(ar);
mutex_unlock(&ar->conf_mutex);
return ret;
}
ath10k_core_stop(ar);
mutex_unlock(&ar->conf_mutex);
ath10k_hif_power_down(ar);
return 0;
}

15
drivers/net/wireless/ath/ath10k/debug.c
View File

@ -618,6 +618,8 @@ int ath10k_debug_start(struct ath10k *ar)
{
int ret;
lockdep_assert_held(&ar->conf_mutex);
ret = ath10k_debug_htt_stats_req(ar);
if (ret)
/* continue normally anyway, this isn't serious */
@ -628,7 +630,13 @@ int ath10k_debug_start(struct ath10k *ar)
void ath10k_debug_stop(struct ath10k *ar)
{
cancel_delayed_work_sync(&ar->debug.htt_stats_dwork);
lockdep_assert_held(&ar->conf_mutex);
/* Must not use _sync to avoid deadlock, we do that in
* ath10k_debug_destroy(). The check for htt_stats_mask is to avoid
* warning from del_timer(). */
if (ar->debug.htt_stats_mask != 0)
cancel_delayed_work(&ar->debug.htt_stats_dwork);
}
int ath10k_debug_create(struct ath10k *ar)
@ -662,6 +670,11 @@ int ath10k_debug_create(struct ath10k *ar)
return 0;
}
void ath10k_debug_destroy(struct ath10k *ar)
{
cancel_delayed_work_sync(&ar->debug.htt_stats_dwork);
}
#endif /* CONFIG_ATH10K_DEBUGFS */
#ifdef CONFIG_ATH10K_DEBUG

5
drivers/net/wireless/ath/ath10k/debug.h
View File

@ -46,6 +46,7 @@ extern __printf(1, 2) int ath10k_warn(const char *fmt, ...);
int ath10k_debug_start(struct ath10k *ar);
void ath10k_debug_stop(struct ath10k *ar);
int ath10k_debug_create(struct ath10k *ar);
void ath10k_debug_destroy(struct ath10k *ar);
void ath10k_debug_read_service_map(struct ath10k *ar,
void *service_map,
size_t map_size);
@ -67,6 +68,10 @@ static inline int ath10k_debug_create(struct ath10k *ar)
return 0;
}
static inline void ath10k_debug_destroy(struct ath10k *ar)
{
}
static inline void ath10k_debug_read_service_map(struct ath10k *ar,
void *service_map,
size_t map_size)