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staging: rtl8822be: Keep array subscript no lower than zero

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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 <[email protected]>
c: kbuild test robot <[email protected]>
Fixes: 9ce99b04b5 staging: r8822be: Add phydm mini driver
Signed-off-by: Greg Kroah-Hartman <[email protected]>
This commit is contained in:
Larry Finger authored and Greg Kroah-Hartman committed 2017-10-18 15:33:15 +02:00
1 parent 78cd0ddc67
commit 43d15c2013
1 file changed
+2
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drivers/staging/rtlwifi/phydm/phydm_dig.c
+2
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@@ -490,6 +490,8 @@ void odm_pause_dig(void *dm_void, enum phydm_pause_type pause_type,
break;
}
/* pin max_level to be >= 0 */
max_level = max_t(s8, 0, max_level);
/* write IGI of lower level */
odm_write_dig(dm, dig_tab->pause_dig_value[max_level]);
ODM_RT_TRACE(dm, ODM_COMP_DIG,