• Arnd Bergmann's avatar
    media: dvb-frontends: fix i2c access helpers for KASAN · 3cd890db
    Arnd Bergmann authored
    A typical code fragment was copied across many dvb-frontend drivers and
    causes large stack frames when built with with CONFIG_KASAN on gcc-5/6/7:
    
    drivers/media/dvb-frontends/cxd2841er.c:3225:1: error: the frame size of 3992 bytes is larger than 3072 bytes [-Werror=frame-larger-than=]
    drivers/media/dvb-frontends/cxd2841er.c:3404:1: error: the frame size of 3136 bytes is larger than 3072 bytes [-Werror=frame-larger-than=]
    drivers/media/dvb-frontends/stv0367.c:3143:1: error: the frame size of 4016 bytes is larger than 3072 bytes [-Werror=frame-larger-than=]
    drivers/media/dvb-frontends/stv090x.c:3430:1: error: the frame size of 5312 bytes is larger than 3072 bytes [-Werror=frame-larger-than=]
    drivers/media/dvb-frontends/stv090x.c:4248:1: error: the frame size of 4872 bytes is larger than 3072 bytes [-Werror=frame-larger-than=]
    
    gcc-8 now solves this by consolidating the stack slots for the argument
    variables, but on older compilers we can get the same behavior by taking
    the pointer of a local variable rather than the inline function argument.
    
    Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81715
    
    Cc: stable@vger.kernel.org
    Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
    Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
    3cd890db
zl10039.c 6.9 KB