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staging/csr: Fix dereference before check 

Smatch complains about some pointers that are dereferenced before being
checked:

drivers/staging/csr/sme_sys.c:285
CsrWifiRouterCtrlHipReqHandler() warn: variable dereferenced before
check 'priv' (see line 283)
drivers/staging/csr/sme_sys.c:1503
CsrWifiRouterMaPacketReqHandler() warn: variable dereferenced before
check 'priv' (see line 1501)
drivers/staging/csr/sme_sys.c:2062
CsrWifiRouterCtrlPeerDelReqHandler() warn: variable dereferenced before
check 'priv' (see line 2059)
drivers/staging/csr/sme_sys.c:2477
CsrWifiRouterCtrlPeerAddReqHandler() warn: variable dereferenced before
check 'priv' (see line 2474)
drivers/staging/csr/sme_sys.c:3045
CsrWifiRouterCtrlWapiRxPktReqHandler() warn: variable dereferenced
before check 'priv' (see line 3039)

We put the check before the dereferencing and prevent an oops and fix
the warning.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Peter Huewe 2013-01-07 23:09:53 +01:00 committed by Greg Kroah-Hartman
parent dbc320f749
commit 94b84e4510
1 changed files with 26 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
drivers/staging/csr/sme_sys.c
View File

@ -280,7 +280,7 @@ void CsrWifiRouterCtrlHipReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
CSR_SIGNAL *signal;
u16 interfaceTag = 0;
CSR_MA_PACKET_REQUEST *req;
netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
netInterface_priv_t *interfacePriv;
if (priv == NULL) {
return;
@ -294,6 +294,8 @@ void CsrWifiRouterCtrlHipReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
return;
}
interfacePriv = priv->interfacePriv[interfaceTag];
/* Initialize bulkdata to avoid os_net_buf is garbage */
memset(&bulkdata, 0, sizeof(bulk_data_param_t));
@ -1498,7 +1500,7 @@ void CsrWifiRouterMaPacketReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
u8 *daddr, *saddr;
u16 interfaceTag = mareq->interfaceTag & 0x00ff;
int queue;
netInterface_priv_t *interfacePriv = priv->interfacePriv[interfaceTag];
netInterface_priv_t *interfacePriv;
if (!mareq->frame || !priv || !priv->smepriv)
{
@ -1510,6 +1512,8 @@ void CsrWifiRouterMaPacketReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
unifi_error(priv, "CsrWifiRouterMaPacketReqHandler: interfaceID >= CSR_WIFI_NUM_INTERFACES.\n");
return;
}
interfacePriv = priv->interfacePriv[interfaceTag];
/* get a pointer to dest & source Mac address */
daddr = mareq->frame;
saddr = (mareq->frame + ETH_ALEN);
@ -2056,9 +2060,9 @@ void CsrWifiRouterCtrlPeerDelReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
CsrWifiRouterCtrlPeerDelReq* req = (CsrWifiRouterCtrlPeerDelReq*)msg;
CsrResult status = CSR_RESULT_SUCCESS;
unifi_priv_t *priv = (unifi_priv_t*)drvpriv;
netInterface_priv_t *interfacePriv = priv->interfacePriv[req->interfaceTag];
netInterface_priv_t *interfacePriv;
unifi_trace(priv, UDBG2, "entering CsrWifiRouterCtrlPeerDelReqHandler \n");
unifi_trace(priv, UDBG2, "entering CsrWifiRouterCtrlPeerDelReqHandler\n");
if (priv == NULL)
{
unifi_error(priv, "CsrWifiRouterCtrlPeerDelReqHandler: invalid smepriv\n");
@ -2071,6 +2075,8 @@ void CsrWifiRouterCtrlPeerDelReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
return;
}
interfacePriv = priv->interfacePriv[req->interfaceTag];
switch(interfacePriv->interfaceMode)
{
case CSR_WIFI_ROUTER_CTRL_MODE_AP:
@ -2471,7 +2477,7 @@ void CsrWifiRouterCtrlPeerAddReqHandler(void* drvpriv,CsrWifiFsmEvent* msg)
CsrResult status = CSR_RESULT_SUCCESS;
unifi_priv_t *priv = (unifi_priv_t*)drvpriv;
u32 handle = 0;
netInterface_priv_t *interfacePriv = priv->interfacePriv[req->interfaceTag];
netInterface_priv_t *interfacePriv;
unifi_trace(priv, UDBG2, "entering CsrWifiRouterCtrlPeerAddReqHandler \n");
if (priv == NULL)
@ -2486,6 +2492,8 @@ void CsrWifiRouterCtrlPeerAddReqHandler(void* drvpriv,CsrWifiFsmEvent* msg)
return;
}
interfacePriv = priv->interfacePriv[req->interfaceTag];
switch(interfacePriv->interfaceMode)
{
case CSR_WIFI_ROUTER_CTRL_MODE_AP:
@ -3036,21 +3044,24 @@ void CsrWifiRouterCtrlWapiRxPktReqHandler(void* drvpriv, CsrWifiFsmEvent* msg)
ul_client_t *client;
CSR_SIGNAL signal;
CSR_MA_PACKET_INDICATION *pkt_ind;
netInterface_priv_t *interfacePriv = priv->interfacePriv[req->interfaceTag];
netInterface_priv_t *interfacePriv;
if (priv == NULL) {
unifi_error(priv, "CsrWifiRouterCtrlWapiRxPktReq : invalid priv\n", __func__);
return;
}
if (priv->smepriv == NULL) {
unifi_error(priv, "CsrWifiRouterCtrlWapiRxPktReq : invalid sme priv\n", __func__);
return;
}
interfacePriv = priv->interfacePriv[req->interfaceTag];
if (CSR_WIFI_ROUTER_CTRL_MODE_STA == interfacePriv->interfaceMode) {
unifi_trace(priv, UDBG6, ">>%s\n", __FUNCTION__);
if (priv == NULL) {
unifi_error(priv, "CsrWifiRouterCtrlWapiRxPktReq : invalid priv\n",__FUNCTION__);
return;
}
if (priv->smepriv == NULL) {
unifi_error(priv, "CsrWifiRouterCtrlWapiRxPktReq : invalid sme priv\n",__FUNCTION__);
return;
}
if (req->dataLength == 0 || req->data == NULL) {
unifi_error(priv, "CsrWifiRouterCtrlWapiRxPktReq: invalid request\n",__FUNCTION__);