linux-kernel - drivers/media/dvb-frontends/nxt200x.c:1087:12: warning: stack frame size of 17760 bytes in function 'nxt200x

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Date:   Fri, 7 May 2021 00:45:50 +0800
From:   kernel test robot <lkp@...el.com>
To:     Walter Wu <walter-zh.wu@...iatek.com>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org,
        Nathan Chancellor <natechancellor@...il.com>,
        Andrey Konovalov <andreyknvl@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: drivers/media/dvb-frontends/nxt200x.c:1087:12: warning: stack frame
 size of 17760 bytes in function 'nxt200x_init'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   8404c9fbc84b741f66cff7d4934a25dd2c344452
commit: 02c587733c8161355a43e6e110c2e29bd0acff72 kasan: remove redundant config option
date:   3 weeks ago
config: arm64-randconfig-r034-20210506 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 8f5a2a5836cc8e4c1def2bdeb022e7b496623439)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=02c587733c8161355a43e6e110c2e29bd0acff72
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 02c587733c8161355a43e6e110c2e29bd0acff72
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/media/dvb-frontends/nxt200x.c:1087:12: warning: stack frame size of 17760 bytes in function 'nxt200x_init' [-Wframe-larger-than=]
   static int nxt200x_init(struct dvb_frontend* fe)
              ^
>> drivers/media/dvb-frontends/nxt200x.c:519:12: warning: stack frame size of 10560 bytes in function 'nxt200x_setup_frontend_parameters' [-Wframe-larger-than=]
   static int nxt200x_setup_frontend_parameters(struct dvb_frontend *fe)
              ^
   2 warnings generated.
--
>> drivers/media/dvb-frontends/stv090x.c:4685:12: warning: stack frame size of 8224 bytes in function 'stv090x_init' [-Wframe-larger-than=]
   static int stv090x_init(struct dvb_frontend *fe)
              ^
   drivers/media/dvb-frontends/stv090x.c:1976:12: warning: stack frame size of 14240 bytes in function 'stv090x_blind_search' [-Wframe-larger-than=]
   static int stv090x_blind_search(struct stv090x_state *state)
              ^
   2 warnings generated.


vim +/nxt200x_init +1087 drivers/media/dvb-frontends/nxt200x.c

04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1086  
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08 @1087  static int nxt200x_init(struct dvb_frontend* fe)
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1088  {
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1089  	struct nxt200x_state* state = fe->demodulator_priv;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1090  	int ret = 0;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1091  
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1092  	if (!state->initialised) {
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1093  		switch (state->demod_chip) {
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1094  			case NXT2002:
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1095  				ret = nxt2002_init(fe);
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1096  				break;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1097  			case NXT2004:
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1098  				ret = nxt2004_init(fe);
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1099  				break;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1100  			default:
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1101  				return -EINVAL;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1102  		}
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1103  		state->initialised = 1;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1104  	}
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1105  	return ret;
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1106  }
04a45929e7f00e drivers/media/dvb/frontends/nxt200x.c Kirk Lapray 2005-11-08  1107  

:::::: The code at line 1087 was first introduced by commit
:::::: 04a45929e7f00ed4fc7b1d375397f808c8a5d0eb [PATCH] dvb: add nxt200x frontend module

:::::: TO: Kirk Lapray <kirk.lapray@...il.com>
:::::: CC: Linus Torvalds <torvalds@...osdl.org>

---
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