[stable:linux-5.15.y 36/9999] drivers/media/dvb-frontends/mb86a16.c:1600:26: warning: stack frame size (1168) exceeds limit (1024) in 'mb86a16_search'

[stable:linux-5.15.y 36/9999] drivers/media/dvb-frontends/mb86a16.c:1600:26: warning: stack frame size (1168) exceeds limit (1024) in 'mb86a16_search'

[kernel test robot]

Hi Kees,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.15.y
head:   7349e40704a0209a2af8b37fa876322209de9684
commit: 33db9912ff7c491f839c89a08e98f755aa09598f [36/9999] ubsan: remove CONFIG_UBSAN_OBJECT_SIZE
config: riscv-randconfig-r012-20230608 (https://download.01.org/0day-ci/archive/20230610/202306100926.Svnvd4mx-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project.git f28c006a5895fc0e329fe15fead81e37457cb1d1)
reproduce (this is a W=1 build):
        mkdir -p ~/bin
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=33db9912ff7c491f839c89a08e98f755aa09598f
        git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
        git fetch --no-tags stable linux-5.15.y
        git checkout 33db9912ff7c491f839c89a08e98f755aa09598f
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/media/dvb-frontends/

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/202306100926.Svnvd4mx-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/media/dvb-frontends/mb86a16.c:1600:26: warning: stack frame size (1168) exceeds limit (1024) in 'mb86a16_search' [-Wframe-larger-than]
   static enum dvbfe_search mb86a16_search(struct dvb_frontend *fe)
                            ^
   1 warning generated.


vim +/mb86a16_search +1600 drivers/media/dvb-frontends/mb86a16.c

41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1599  
41da5320df6dec drivers/media/dvb/frontends/mb86a16.c Mauro Carvalho Chehab 2011-12-26 @1600  static enum dvbfe_search mb86a16_search(struct dvb_frontend *fe)
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1601  {
41da5320df6dec drivers/media/dvb/frontends/mb86a16.c Mauro Carvalho Chehab 2011-12-26  1602  	struct dtv_frontend_properties *p = &fe->dtv_property_cache;
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1603  	struct mb86a16_state *state = fe->demodulator_priv;
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1604  
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1605  	state->frequency = p->frequency / 1000;
41da5320df6dec drivers/media/dvb/frontends/mb86a16.c Mauro Carvalho Chehab 2011-12-26  1606  	state->srate = p->symbol_rate / 1000;
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1607  
5dd83a35bea908 drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-15  1608  	if (!mb86a16_set_fe(state)) {
25985edcedea63 drivers/media/dvb/frontends/mb86a16.c Lucas De Marchi       2011-03-30  1609  		dprintk(verbose, MB86A16_ERROR, 1, "Successfully acquired LOCK");
5dd83a35bea908 drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-15  1610  		return DVBFE_ALGO_SEARCH_SUCCESS;
5dd83a35bea908 drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-15  1611  	}
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1612  
5dd83a35bea908 drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-15  1613  	dprintk(verbose, MB86A16_ERROR, 1, "Lock acquisition failed!");
5dd83a35bea908 drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-15  1614  	return DVBFE_ALGO_SEARCH_FAILED;
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1615  }
41e840b13e111b drivers/media/dvb/frontends/mb86a16.c Manu Abraham          2009-12-02  1616  

:::::: The code at line 1600 was first introduced by commit
:::::: 41da5320df6decec7efce0d936ccadfa9deb49d1 [media] dvb: don't pass a DVBv3 parameter for search() fops

:::::: TO: Mauro Carvalho Chehab <mchehab@redhat.com>
:::::: CC: Mauro Carvalho Chehab <mchehab@redhat.com>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki