On Thu, 23 Aug 2018 11:11:18 +0300
Claudiu Beznea <Claudiu.Beznea@xxxxxxxxxxxxx> wrote:
> On 14.08.2018 09:50, Ajay Singh wrote:
> > Remove the use of static variable 'terminated_handle' and instead
> > move in wilc_vif struct.
> > After moving this variable to wilc_vif struct its not required to
> > keep 'terminated_handle', so changed it to boolean type.
>
> You can remove it at all and use wilc->hif_deinit_lock mutex also in
> wilc_scan_complete_received() and wilc_network_info_received() it is
> used in wilc_gnrl_async_info_received().
In my understanding, 'terminated_handle' is used to know the
status when interface is getting deinit(). During deinitialization
of an interface if any async event received for the interface(from
firmware) should be ignored.
In my opinion its not right to only wait for the mutex in any of
callback e.g wilc_scan_complete_received() because it will delay the
handling of callback and try to process the event once lock is
available for the interface which is already de-initialized.
Based on my understand 'mutex' alone is not enough to
handle this and we some extra check to know if interface is down.I will
check more about this patch how to handle the extra scenario for this
case.
Please suggest if someone has better idea on how to handle this.
>
> >
> > Signed-off-by: Ajay Singh <ajay.kathat@xxxxxxxxxxxxx>
> > ---
> > drivers/staging/wilc1000/host_interface.c | 11 +++++------
> > drivers/staging/wilc1000/wilc_wfi_netdevice.h | 1 +
> > 2 files changed, 6 insertions(+), 6 deletions(-)
> >
> > diff --git a/drivers/staging/wilc1000/host_interface.c
> > b/drivers/staging/wilc1000/host_interface.c index
> > d5d81843..f71f451f 100644 ---
> > a/drivers/staging/wilc1000/host_interface.c +++
> > b/drivers/staging/wilc1000/host_interface.c @@ -185,7 +185,6 @@
> > struct join_bss_param { u8 start_time[4];
> > };
> >
> > -static struct host_if_drv *terminated_handle;
> > static u8 p2p_listen_state;
> > static struct timer_list periodic_rssi;
> > static struct wilc_vif *periodic_rssi_vif;
> > @@ -3505,7 +3504,7 @@ int wilc_deinit(struct wilc_vif *vif)
> >
> > mutex_lock(&vif->wilc->hif_deinit_lock);
> >
> > - terminated_handle = hif_drv;
> > + vif->is_termination_progress = true;
> >
> > del_timer_sync(&hif_drv->scan_timer);
> > del_timer_sync(&hif_drv->connect_timer);
> > @@ -3543,7 +3542,7 @@ int wilc_deinit(struct wilc_vif *vif)
> > kfree(hif_drv);
> >
> > vif->wilc->clients_count--;
> > - terminated_handle = NULL;
> > + vif->is_termination_progress = false;
> > mutex_unlock(&vif->wilc->hif_deinit_lock);
> > return result;
> > }
> > @@ -3565,7 +3564,7 @@ void wilc_network_info_received(struct wilc
> > *wilc, u8 *buffer, u32 length) return;
> > hif_drv = vif->hif_drv;
> >
> > - if (!hif_drv || hif_drv == terminated_handle) {
> > + if (!hif_drv || vif->is_termination_progress) {
> > netdev_err(vif->ndev, "driver not init[%p]\n",
> > hif_drv); return;
> > }
> > @@ -3611,7 +3610,7 @@ void wilc_gnrl_async_info_received(struct
> > wilc *wilc, u8 *buffer, u32 length)
> > hif_drv = vif->hif_drv;
> >
> > - if (!hif_drv || hif_drv == terminated_handle) {
> > + if (!hif_drv || vif->is_termination_progress) {
> > mutex_unlock(&wilc->hif_deinit_lock);
> > return;
> > }
> > @@ -3662,7 +3661,7 @@ void wilc_scan_complete_received(struct wilc
> > *wilc, u8 *buffer, u32 length) return;
> > hif_drv = vif->hif_drv;
> >
> > - if (!hif_drv || hif_drv == terminated_handle)
> > + if (!hif_drv || vif->is_termination_progress)
> > return;
> >
> > if (hif_drv->usr_scan_req.scan_result) {
> > diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.h
> > b/drivers/staging/wilc1000/wilc_wfi_netdevice.h index
> > eb00e42..ba606d0 100644 ---
> > a/drivers/staging/wilc1000/wilc_wfi_netdevice.h +++
> > b/drivers/staging/wilc1000/wilc_wfi_netdevice.h @@ -121,6 +121,7 @@
> > struct wilc_vif { struct timer_list during_ip_timer;
> > bool obtaining_ip;
> > u8 mc_mac_addr_list[WILC_MULTICAST_TABLE_SIZE][ETH_ALEN];
> > + bool is_termination_progress;
> > };
> >
> > struct wilc {
> >
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