staging: rtl8192e: Fix smatch error in r8192E_phy.c

Smatch reports the following:

  CHECK   drivers/staging/rtl8192e/r8192E_phy.c
drivers/staging/rtl8192e/r8192E_phy.c +940 rtl8192_phy_SwChnlStepByStep(92) error: potential null derefence 'CurrentCmd'.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 3 insertions, 1 deletions

diff --git a/drivers/staging/rtl8192e/r8192E_phy.c b/drivers/staging/rtl8192e/r8192E_phy.c
index 83e00d72199..7ec6139cb4f 100644
--- a/drivers/staging/rtl8192e/r8192E_phy.c
+++ b/drivers/staging/rtl8192e/r8192E_phy.c
@@ -937,7 +937,7 @@ static u8 rtl8192_phy_SwChnlStepByStep(struct net_device *dev, u8 channel,
                                 break;
                         }
 
-                        if (CurrentCmd->CmdID == CmdID_End) {
+                        if (CurrentCmd && CurrentCmd->CmdID == CmdID_End) {
                                 if ((*stage) == 2) {
                                         return true;
                                 } else {
@@ -947,6 +947,8 @@ static u8 rtl8192_phy_SwChnlStepByStep(struct net_device *dev, u8 channel,
                                 }
                         }
 
+                        if (!CurrentCmd)
+                                continue;
                         switch (CurrentCmd->CmdID) {
                         case CmdID_SetTxPowerLevel:
                                 if (priv->IC_Cut > (u8)VERSION_8190_BD)