Patch "iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE" has been added to the 4.4-stable tree

Patch "iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE" has been added to the 4.4-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     iio-st_magn-always-define-st_magn_trigger_set_state.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 9b090a98e95c2530ef0ce474e3b6218621b8ae25 Mon Sep 17 00:00:00 2001
From: Arnd Bergmann <arnd@arndb.de>
Date: Tue, 29 Mar 2016 22:27:27 +0200
Subject: iio: st_magn: always define ST_MAGN_TRIGGER_SET_STATE

From: Arnd Bergmann <arnd@arndb.de>

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 |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/magnetometer/st_magn.h
+++ b/drivers/iio/magnetometer/st_magn.h
@@ -44,6 +44,7 @@ static inline int st_magn_allocate_ring(
 static inline void st_magn_deallocate_ring(struct iio_dev *indio_dev)
 {
 }
+#define ST_MAGN_TRIGGER_SET_STATE NULL
 #endif /* CONFIG_IIO_BUFFER */
 
 #endif /* ST_MAGN_H */


Patches currently in stable-queue which might be from arnd@arndb.de are

queue-4.4/mac80211-avoid-excessive-stack-usage-in-sta_info.patch
queue-4.4/farsync-fix-off-by-one-bug-in-fst_add_one.patch
queue-4.4/pcmcia-db1xxx_ss-fix-last-irq_to_gpio-user.patch
queue-4.4/ath9k-fix-buffer-overrun-for-ar9287.patch
queue-4.4/iio-st_magn-always-define-st_magn_trigger_set_state.patch
queue-4.4/hwmon-max1111-return-enodev-from-max1111_read_channel-if-not-instantiated.patch
queue-4.4/mlx4-add-missing-braces-in-verify_qp_parameters.patch