gpu: pvr: fix PVRSRVWrapExtMemoryKM for user provided physical pages

Reported-by: Coverity
Signed-off-by: Imre Deak <imre.deak@nokia.com>
Reviewed-by: Pauli Nieminen <ext-pauli.nieminen@nokia.com>

diff --git a/pvr/devicemem.c b/pvr/devicemem.c
index 881cf24..eb57ea3 100644 (file)
--- a/pvr/devicemem.c
+++ b/pvr/devicemem.c
@@ -713,7 +713,7 @@ enum PVRSRV_ERROR PVRSRVWrapExtMemoryKM(void *hDevCookie,
        psDeviceNode = (struct PVRSRV_DEVICE_NODE *)hDevCookie;
        PVR_ASSERT(psDeviceNode != NULL);
 
-       if (psDeviceNode == NULL) {
+       if (!psDeviceNode || (!pvLinAddr && !psExtSysPAddr)) {
                PVR_DPF(PVR_DBG_ERROR,
                         "PVRSRVWrapExtMemoryKM: invalid parameter");
                return PVRSRV_ERROR_INVALID_PARAMS;