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staging: rtl8822be: Keep array subscript no lower than zero 

The kbuild test robot reports the following:
   drivers/staging//rtlwifi/phydm/phydm_dig.c: In function 'odm_pause_dig':
   drivers/staging//rtlwifi/phydm/phydm_dig.c:494:45: warning: array subscript is below array bounds [-Warray-bounds]
      odm_write_dig(dm, dig_tab->pause_dig_value[max_level]);

This condition is caused when a loop falls through. The fix is to pin
max_level to be >= 0.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
c: kbuild test robot <fengguang.wu@intel.com>
Fixes: 9ce99b04b5 staging: r8822be: Add phydm mini driver
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Larry Finger 2017-09-23 19:36:04 -05:00 committed by Greg Kroah-Hartman
parent 78cd0ddc67
commit 43d15c2013
1 changed files with 2 additions and 0 deletions
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2
drivers/staging/rtlwifi/phydm/phydm_dig.c
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@ -490,6 +490,8 @@ void odm_pause_dig(void *dm_void, enum phydm_pause_type pause_type,
break; break;
} }
/* pin max_level to be >= 0 */
max_level = max_t(s8, 0, max_level);
/* write IGI of lower level */ /* write IGI of lower level */
odm_write_dig(dm, dig_tab->pause_dig_value[max_level]); odm_write_dig(dm, dig_tab->pause_dig_value[max_level]);
ODM_RT_TRACE(dm, ODM_COMP_DIG, ODM_RT_TRACE(dm, ODM_COMP_DIG,