From: Ajay Singh <ajay.kat...@microchip.com>
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.kat...@microchip.com>
---
drivers/staging/wilc1000/linux_wlan.c | 2 ++
drivers/staging/wilc1000/wilc_wfi_netdevice.h | 3 ++-
drivers/staging/wilc1000/wilc_wlan.c | 21 ++++++++++-----------
3 files changed, 14 insertions(+), 12 deletions(-)
diff --git a/drivers/staging/wilc1000/linux_wlan.c
b/drivers/staging/wilc1000/linux_wlan.c
index c92ee79..e246d18 100644
--- a/drivers/staging/wilc1000/linux_wlan.c
+++ b/drivers/staging/wilc1000/linux_wlan.c
@@ -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);
diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.h
b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
index e71d949..02970c3 100644
--- a/drivers/staging/wilc1000/wilc_wfi_netdevice.h
+++ b/drivers/staging/wilc1000/wilc_wfi_netdevice.h
@@ -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;
diff --git a/drivers/staging/wilc1000/wilc_wlan.c
b/drivers/staging/wilc1000/wilc_wlan.c
index f0b10e2..3c5e9e0 100644
--- a/drivers/staging/wilc1000/wilc_wlan.c
+++ b/drivers/staging/wilc1000/wilc_wlan.c
@@ -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;
}
--
2.7.4
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