gpu: pvr: Check SysAcquireData return value.

SysAcquireData() could theoretically fail.
This patch adds missing return value check in SGXReadDiffCountersKM().

Signed-off-by: Janusz Sobczak <janusz.sobczak@imgtec.com>
Signed-off-by: Imre Deak <imre.deak@nokia.com>

diff --git a/pvr/sgxinit.c b/pvr/sgxinit.c
index 10dbc5a..39c3cf9 100644 (file)
--- a/pvr/sgxinit.c
+++ b/pvr/sgxinit.c
@@ -1531,7 +1531,8 @@ enum PVRSRV_ERROR SGXReadDiffCountersKM(void *hDevHandle, u32 ui32Reg,
                psDevInfo->ui32HWGroupRequested = ui32New;
        psDevInfo->ui32HWReset |= ui32NewReset;
 
-       SysAcquireData(&psSysData);
+       if (SysAcquireData(&psSysData) != PVRSRV_OK)
+               return PVRSRV_ERROR_GENERIC;
 
        psPowerDevice = psSysData->psPowerDeviceList;
        while (psPowerDevice) {