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staging: wilc1000: use mutex lock to synchronized sending 'wid' cmd to firmware

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Use mutex lock to protect the issuing of wid cmd to the firmware.
Currently the wid commands are synchronized by use of hif_workqueue work
queue.
Now, these changes are required to synchronize the access to wid
command, so the commands can be issued directly from cfg80211 context
and 'WILC_wq' thread.

Signed-off-by: Ajay Singh <ajay.kathat@microchip.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Ajay Singh 2018-12-02 18:02:25 +00:00 committed by Greg Kroah-Hartman
parent f78d5db98b
commit 6dea33021f
3 changed files with 14 additions and 12 deletions
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2
drivers/staging/wilc1000/linux_wlan.c
View File

@ -531,6 +531,7 @@ static void wlan_deinit_locks(struct net_device *dev)
mutex_destroy(&wilc->hif_cs);
mutex_destroy(&wilc->rxq_cs);
mutex_destroy(&wilc->cfg_cmd_lock);
mutex_destroy(&wilc->txq_add_to_head_cs);
}
@ -592,6 +593,7 @@ static void wlan_init_locks(struct net_device *dev)
mutex_init(&wl->hif_cs);
mutex_init(&wl->rxq_cs);
mutex_init(&wl->cfg_cmd_lock);
spin_lock_init(&wl->txq_spinlock);
mutex_init(&wl->txq_add_to_head_cs);

3
drivers/staging/wilc1000/wilc_wfi_netdevice.h
View File

@ -247,7 +247,8 @@ struct wilc {
struct task_struct *txq_thread;
int quit;
int cfg_frame_in_use;
/* lock to protect issue of wid command to firmware */
struct mutex cfg_cmd_lock;
struct wilc_cfg_frame cfg_frame;
u32 cfg_frame_offset;
int cfg_seq_no;

21
drivers/staging/wilc1000/wilc_wlan.c
View File

@ -1122,8 +1122,7 @@ int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
int ret_size;
struct wilc *wilc = vif->wilc;
if (wilc->cfg_frame_in_use)
return 0;
mutex_lock(&wilc->cfg_cmd_lock);
if (start)
wilc->cfg_frame_offset = 0;
@ -1134,11 +1133,12 @@ int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
offset += ret_size;
wilc->cfg_frame_offset = offset;
if (!commit)
if (!commit) {
mutex_unlock(&wilc->cfg_cmd_lock);
return ret_size;
}
netdev_dbg(vif->ndev, "%s: seqno[%d]\n", __func__, wilc->cfg_seq_no);
wilc->cfg_frame_in_use = 1;
if (wilc_wlan_cfg_commit(vif, WILC_CFG_SET, drv_handler))
ret_size = 0;
@ -1149,9 +1149,9 @@ int wilc_wlan_cfg_set(struct wilc_vif *vif, int start, u16 wid, u8 *buffer,
ret_size = 0;
}
wilc->cfg_frame_in_use = 0;
wilc->cfg_frame_offset = 0;
wilc->cfg_seq_no += 1;
mutex_unlock(&wilc->cfg_cmd_lock);
return ret_size;
}
@ -1163,8 +1163,7 @@ int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
int ret_size;
struct wilc *wilc = vif->wilc;
if (wilc->cfg_frame_in_use)
return 0;
mutex_lock(&wilc->cfg_cmd_lock);
if (start)
wilc->cfg_frame_offset = 0;
@ -1174,10 +1173,10 @@ int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
offset += ret_size;
wilc->cfg_frame_offset = offset;
if (!commit)
if (!commit) {
mutex_unlock(&wilc->cfg_cmd_lock);
return ret_size;
wilc->cfg_frame_in_use = 1;
}
if (wilc_wlan_cfg_commit(vif, WILC_CFG_QUERY, drv_handler))
ret_size = 0;
@ -1187,9 +1186,9 @@ int wilc_wlan_cfg_get(struct wilc_vif *vif, int start, u16 wid, int commit,
netdev_dbg(vif->ndev, "%s: Timed Out\n", __func__);
ret_size = 0;
}
wilc->cfg_frame_in_use = 0;
wilc->cfg_frame_offset = 0;
wilc->cfg_seq_no += 1;
mutex_unlock(&wilc->cfg_cmd_lock);
return ret_size;
}