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authorAlexey Khoroshilov <khoroshilov@ispras.ru>2015-10-18 00:33:09 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-10-17 20:56:10 -0700
commitac0a36679928e3e8d7cc0b4c2fd02fb368186992 (patch)
treea5b6c09f10a6f4a98cf0fe9280d2d32780addea8
parentd566e69024ac9d00ab7d0b0442ad2ba3ed4bd668 (diff)
staging: r8188eu: Add _enter_critical_mutex() error handling
_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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/staging/rtl8188eu/core/rtw_mlme_ext.c5
-rw-r--r--drivers/staging/rtl8188eu/include/osdep_service.h9
-rw-r--r--drivers/staging/rtl8188eu/os_dep/os_intfs.c3
-rw-r--r--drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c5
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 d8a0895..e15c198 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 cf9ca68..96505a6 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 d85647c..d063d02 100644
--- a/drivers/staging/rtl8188eu/os_dep/os_intfs.c
+++ b/drivers/staging/rtl8188eu/os_dep/os_intfs.c
@@ -1058,7 +1058,8 @@ 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 7e599bc..0fea338 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;