[chrome-os:chromeos-5.15 22/24] drivers/gpu/drm/img-rogue/1.17/devicemem_server.c:783:26: warning: variable 'sLastReserveAddr' set but not used

[kernel test robot <lkp@intel.com>]

tree:   https://chromium.googlesource.com/chromiumos/third_party/kernel chromeos-5.15
head:   e495935040e9178d313071a88dc9e7116aa0761a
commit: 0fc1ca18e2bf3022db1e16cebcccfafd84750c70 [22/24] CHROMIUM: img-rogue/1.17: improve validation in VA mapping calls
config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20231015/202310150734.Aw5tYBPo-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231015/202310150734.Aw5tYBPo-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310150734.Aw5tYBPo-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/img-rogue/1.17/devicemem_server.c: In function 'ReserveRangeParamValidation':
>> drivers/gpu/drm/img-rogue/1.17/devicemem_server.c:783:26: warning: variable 'sLastReserveAddr' set but not used [-Wunused-but-set-variable]
     783 |         IMG_DEV_VIRTADDR sLastReserveAddr;
         |                          ^~~~~~~~~~~~~~~~


vim +/sLastReserveAddr +783 drivers/gpu/drm/img-rogue/1.17/devicemem_server.c

   778	
   779	static INLINE PVRSRV_ERROR ReserveRangeParamValidation(DEVMEMINT_HEAP *psDevmemHeap,
   780	                                                       IMG_DEV_VIRTADDR sAllocationDevVAddr,
   781	                                                       IMG_DEVMEM_SIZE_T uiAllocationSize)
   782	{
 > 783		IMG_DEV_VIRTADDR sLastReserveAddr;
   784		IMG_UINT64 ui64InvalidSizeMask = (1 << psDevmemHeap->uiLog2PageSize) - 1;
   785	
   786		PVR_LOG_RETURN_IF_INVALID_PARAM(psDevmemHeap != NULL, "psDevmemHeap");
   787	
   788		sLastReserveAddr.uiAddr = sAllocationDevVAddr.uiAddr + uiAllocationSize - 1;
   789	
   790		/* Check that the requested address is not less than the base address of the heap. */
   791		if (sAllocationDevVAddr.uiAddr < psDevmemHeap->sBaseAddr.uiAddr)
   792		{
   793			PVR_LOG_VA(PVR_DBG_ERROR,
   794				"sAllocationDevVAddr ("IMG_DEV_VIRTADDR_FMTSPEC") is invalid! "
   795				"Must be greater or equal to "IMG_DEV_VIRTADDR_FMTSPEC,
   796				sAllocationDevVAddr.uiAddr,
   797				psDevmemHeap->sBaseAddr.uiAddr);
   798			return PVRSRV_ERROR_INVALID_PARAMS;
   799		}
   800	
   801		/* Check the allocation size is valid (must be page granular). */
   802		if ((uiAllocationSize & ui64InvalidSizeMask) != 0 || uiAllocationSize == 0)
   803		{
   804			PVR_LOG_VA(PVR_DBG_ERROR,
   805				"uiAllocationSize ("IMG_DEVMEM_SIZE_FMTSPEC") is invalid! Must a multiple of %u and greater than 0",
   806				uiAllocationSize,
   807				1 << psDevmemHeap->uiLog2PageSize);
   808			return PVRSRV_ERROR_INVALID_PARAMS;
   809		}
   810	
   811		return PVRSRV_OK;
   812	}
   813	

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