iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE
authorArnd Bergmann <arnd@arndb.de>
Tue, 29 Mar 2016 20:27:27 +0000 (22:27 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 20 Apr 2016 06:42:11 +0000 (15:42 +0900)
commit01e647a4aec55a156efccdf542579830fd1516eb
tree2f0a1859f47c5f31e30cca1ef7ae3aa09dd5139e
parent277882f94e1d2e82285eb3dc91944634174a9b18
iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE

commit 9b090a98e95c2530ef0ce474e3b6218621b8ae25 upstream.

When CONFIG_IIO_TRIGGER is enabled but CONFIG_IIO_BUFFER is
not, we get a build error in the st_magn driver:

drivers/iio/magnetometer/st_magn_core.c:573:23: error: 'ST_MAGN_TRIGGER_SET_STATE' undeclared here (not in a function)
  .set_trigger_state = ST_MAGN_TRIGGER_SET_STATE,
                       ^~~~~~~~~~~~~~~~~~~~~~~~~

Apparently, this ST_MAGN_TRIGGER_SET_STATE macro was meant to
be set to NULL when the definition is not available because
st_magn_buffer.c is not compiled, but the alternative definition
was not included in the original patch. This adds it.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 74f5683f35fe ("iio: st_magn: Add irq trigger handling")
Acked-by: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/iio/magnetometer/st_magn.h