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Groups > linux.kernel > #1243725 > unrolled thread

[PATCH] staging: r8188eu: Add _enter_critical_mutex() error handling

Started byAlexey Khoroshilov <khoroshilov@ispras.ru>
First post2015-10-10 00:40 +0200
Last post2015-10-17 23:40 +0200
Articles 3 — 2 participants

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  [PATCH] staging: r8188eu: Add _enter_critical_mutex() error handling Alexey Khoroshilov <khoroshilov@ispras.ru> - 2015-10-10 00:40 +0200
    Re: [PATCH] staging: r8188eu: Add _enter_critical_mutex() error  handling Dan Carpenter <dan.carpenter@oracle.com> - 2015-10-10 17:10 +0200
      [PATCH v2] staging: r8188eu: Add _enter_critical_mutex() error handling Alexey Khoroshilov <khoroshilov@ispras.ru> - 2015-10-17 23:40 +0200

#1243725 — [PATCH] staging: r8188eu: Add _enter_critical_mutex() error handling

FromAlexey Khoroshilov <khoroshilov@ispras.ru>
Date2015-10-10 00:40 +0200
Subject[PATCH] staging: r8188eu: Add _enter_critical_mutex() error handling
Message-ID<qhOut-7eA-7@gated-at.bofh.it>
_enter_critical_mutex() is a simple call to mutex_lock_interruptible(),
but there is no error handling code for it.

The patch removes wrapper _enter_critical_mutex() and
adds error handling for mutex_lock_interruptible().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
 drivers/staging/rtl8188eu/core/rtw_mlme_ext.c     | 5 +++--
 drivers/staging/rtl8188eu/include/osdep_service.h | 9 ---------
 drivers/staging/rtl8188eu/os_dep/os_intfs.c       | 3 ++-
 drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c  | 5 ++++-
 4 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
index 935b48eef8b1..4e9312f0e902 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
@@ -271,7 +271,8 @@ static s32 dump_mgntframe_and_wait_ack(struct adapter *padapter,
 	if (padapter->bSurpriseRemoved || padapter->bDriverStopped)
 		return -1;
 
-	_enter_critical_mutex(&pxmitpriv->ack_tx_mutex, NULL);
+	if (!mutex_lock_interruptible(&pxmitpriv->ack_tx_mutex))
+		return _FAIL;
 	pxmitpriv->ack_tx = true;
 
 	pmgntframe->ack_report = 1;
@@ -282,7 +283,7 @@ static s32 dump_mgntframe_and_wait_ack(struct adapter *padapter,
 	pxmitpriv->ack_tx = false;
 	mutex_unlock(&pxmitpriv->ack_tx_mutex);
 
-	 return ret;
+	return ret;
 }
 
 static int update_hidden_ssid(u8 *ies, u32 ies_len, u8 hidden_ssid_mode)
diff --git a/drivers/staging/rtl8188eu/include/osdep_service.h b/drivers/staging/rtl8188eu/include/osdep_service.h
index cf9ca685eb77..96505a6dbe2c 100644
--- a/drivers/staging/rtl8188eu/include/osdep_service.h
+++ b/drivers/staging/rtl8188eu/include/osdep_service.h
@@ -67,15 +67,6 @@ static inline struct list_head *get_list_head(struct __queue *queue)
 	return &(queue->queue);
 }
 
-static inline int _enter_critical_mutex(struct mutex *pmutex,
-					unsigned long *pirqL)
-{
-	int ret;
-
-	ret = mutex_lock_interruptible(pmutex);
-	return ret;
-}
-
 static inline int rtw_netif_queue_stopped(struct net_device *pnetdev)
 {
 	return  netif_tx_queue_stopped(netdev_get_tx_queue(pnetdev, 0)) &&
diff --git a/drivers/staging/rtl8188eu/os_dep/os_intfs.c b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
index 2361bce480c3..9a3425a7110d 100644
--- a/drivers/staging/rtl8188eu/os_dep/os_intfs.c
+++ b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
@@ -1053,7 +1053,8 @@ static int netdev_open(struct net_device *pnetdev)
 	int ret;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
 
-	_enter_critical_mutex(&padapter->hw_init_mutex, NULL);
+	if (mutex_lock_interruptible(&padapter->hw_init_mutex))
+		return -ERESTARTSYS;
 	ret = _netdev_open(pnetdev);
 	mutex_unlock(&padapter->hw_init_mutex);
 	return ret;
diff --git a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
index 7e599bc5b2d3..0fea338d7313 100644
--- a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
@@ -249,7 +249,10 @@ static int usbctrl_vendorreq(struct adapter *adapt, u8 request, u16 value, u16 i
 		goto exit;
 	}
 
-	_enter_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);
+	if (mutex_lock_interruptible(&dvobjpriv->usb_vendor_req_mutex)) {
+		status = -ERESTARTSYS;
+		goto exit;
+	}
 
 	/*  Acquire IO memory for vendorreq */
 	pIo_buf = dvobjpriv->usb_vendor_req_buf;
-- 
1.9.1

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#1243904 — Re: [PATCH] staging: r8188eu: Add _enter_critical_mutex() error handling

FromDan Carpenter <dan.carpenter@oracle.com>
Date2015-10-10 17:10 +0200
SubjectRe: [PATCH] staging: r8188eu: Add _enter_critical_mutex() error handling
Message-ID<qi3Wx-4wl-3@gated-at.bofh.it>
In reply to#1243725
On Sat, Oct 10, 2015 at 01:37:47AM +0300, Alexey Khoroshilov wrote:
> _enter_critical_mutex() is a simple call to mutex_lock_interruptible(),
> but there is no error handling code for it.
> 
> The patch removes wrapper _enter_critical_mutex() and
> adds error handling for mutex_lock_interruptible().
> 
> Found by Linux Driver Verification project (linuxtesting.org).
> 
> Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
> ---
>  drivers/staging/rtl8188eu/core/rtw_mlme_ext.c     | 5 +++--
>  drivers/staging/rtl8188eu/include/osdep_service.h | 9 ---------
>  drivers/staging/rtl8188eu/os_dep/os_intfs.c       | 3 ++-
>  drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c  | 5 ++++-
>  4 files changed, 9 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
> index 935b48eef8b1..4e9312f0e902 100644
> --- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
> +++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
> @@ -271,7 +271,8 @@ static s32 dump_mgntframe_and_wait_ack(struct adapter *padapter,
>  	if (padapter->bSurpriseRemoved || padapter->bDriverStopped)
>  		return -1;
>  
> -	_enter_critical_mutex(&pxmitpriv->ack_tx_mutex, NULL);
> +	if (!mutex_lock_interruptible(&pxmitpriv->ack_tx_mutex))
> +		return _FAIL;

This is reversed.  mutex_lock_interruptible() returns -EINTR on failure.
The rest of this patch is correct.

regards,
dan carpenter


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#1249474 — [PATCH v2] staging: r8188eu: Add _enter_critical_mutex() error handling

FromAlexey Khoroshilov <khoroshilov@ispras.ru>
Date2015-10-17 23:40 +0200
Subject[PATCH v2] staging: r8188eu: Add _enter_critical_mutex() error handling
Message-ID<qkHmP-1oP-23@gated-at.bofh.it>
In reply to#1243904
_enter_critical_mutex() is a simple call to mutex_lock_interruptible(),
but there is no error handling code for it.

The patch removes wrapper _enter_critical_mutex() and
adds error handling for mutex_lock_interruptible().

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
---
 drivers/staging/rtl8188eu/core/rtw_mlme_ext.c     | 5 +++--
 drivers/staging/rtl8188eu/include/osdep_service.h | 9 ---------
 drivers/staging/rtl8188eu/os_dep/os_intfs.c       | 3 ++-
 drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c  | 5 ++++-
 4 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
index 935b48eef8b1..4e9312f0e902 100644
--- a/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
+++ b/drivers/staging/rtl8188eu/core/rtw_mlme_ext.c
@@ -271,7 +271,8 @@ static s32 dump_mgntframe_and_wait_ack(struct adapter *padapter,
 	if (padapter->bSurpriseRemoved || padapter->bDriverStopped)
 		return -1;
 
-	_enter_critical_mutex(&pxmitpriv->ack_tx_mutex, NULL);
+	if (mutex_lock_interruptible(&pxmitpriv->ack_tx_mutex))
+		return _FAIL;
 	pxmitpriv->ack_tx = true;
 
 	pmgntframe->ack_report = 1;
@@ -282,7 +283,7 @@ static s32 dump_mgntframe_and_wait_ack(struct adapter *padapter,
 	pxmitpriv->ack_tx = false;
 	mutex_unlock(&pxmitpriv->ack_tx_mutex);
 
-	 return ret;
+	return ret;
 }
 
 static int update_hidden_ssid(u8 *ies, u32 ies_len, u8 hidden_ssid_mode)
diff --git a/drivers/staging/rtl8188eu/include/osdep_service.h b/drivers/staging/rtl8188eu/include/osdep_service.h
index cf9ca685eb77..96505a6dbe2c 100644
--- a/drivers/staging/rtl8188eu/include/osdep_service.h
+++ b/drivers/staging/rtl8188eu/include/osdep_service.h
@@ -67,15 +67,6 @@ static inline struct list_head *get_list_head(struct __queue *queue)
 	return &(queue->queue);
 }
 
-static inline int _enter_critical_mutex(struct mutex *pmutex,
-					unsigned long *pirqL)
-{
-	int ret;
-
-	ret = mutex_lock_interruptible(pmutex);
-	return ret;
-}
-
 static inline int rtw_netif_queue_stopped(struct net_device *pnetdev)
 {
 	return  netif_tx_queue_stopped(netdev_get_tx_queue(pnetdev, 0)) &&
diff --git a/drivers/staging/rtl8188eu/os_dep/os_intfs.c b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
index 2361bce480c3..9a3425a7110d 100644
--- a/drivers/staging/rtl8188eu/os_dep/os_intfs.c
+++ b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
@@ -1053,7 +1053,8 @@ static int netdev_open(struct net_device *pnetdev)
 	int ret;
 	struct adapter *padapter = (struct adapter *)rtw_netdev_priv(pnetdev);
 
-	_enter_critical_mutex(&padapter->hw_init_mutex, NULL);
+	if (mutex_lock_interruptible(&padapter->hw_init_mutex))
+		return -ERESTARTSYS;
 	ret = _netdev_open(pnetdev);
 	mutex_unlock(&padapter->hw_init_mutex);
 	return ret;
diff --git a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
index 7e599bc5b2d3..0fea338d7313 100644
--- a/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c
@@ -249,7 +249,10 @@ static int usbctrl_vendorreq(struct adapter *adapt, u8 request, u16 value, u16 i
 		goto exit;
 	}
 
-	_enter_critical_mutex(&dvobjpriv->usb_vendor_req_mutex, NULL);
+	if (mutex_lock_interruptible(&dvobjpriv->usb_vendor_req_mutex)) {
+		status = -ERESTARTSYS;
+		goto exit;
+	}
 
 	/*  Acquire IO memory for vendorreq */
 	pIo_buf = dvobjpriv->usb_vendor_req_buf;
-- 
1.9.1

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