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authorLars-Peter Clausen <lars@metafoo.de>2021-10-24 20:12:50 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-12-14 12:57:21 +0300
commite4b600ac98ca65f0c49be7f4f914cfb4b876e7a3 (patch)
tree760d1185bbc667454d030d2379a8c066b179c9bf
parent5df9c2c0e4b410f24aabdd8fc4d61ab68eecbc60 (diff)
downloadlinux-e4b600ac98ca65f0c49be7f4f914cfb4b876e7a3.tar.xz
iio: kxsd9: Don't return error code in trigger handler
commit 45febe0d63917ee908198c5be08511c64ee1790a upstream. IIO trigger handlers need to return one of the irqreturn_t values. Returning an error code is not supported. The kxsd9 interrupt handler returns an error code if reading the data registers fails. In addition when exiting due to an error the trigger handler does not call `iio_trigger_notify_done()`. Which when not done keeps the triggered disabled forever. Modify the code so that the function returns a valid irqreturn_t value as well as calling `iio_trigger_notify_done()` on all exit paths. Since we can't return the error code make sure to at least log it as part of the error message. Fixes: 0427a106a98a ("iio: accel: kxsd9: Add triggered buffer handling") Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lore.kernel.org/r/20211024171251.22896-2-lars@metafoo.de Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/iio/accel/kxsd9.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c
index bf7ed9e7d00f..e56ecc075014 100644
--- a/drivers/iio/accel/kxsd9.c
+++ b/drivers/iio/accel/kxsd9.c
@@ -224,14 +224,14 @@ static irqreturn_t kxsd9_trigger_handler(int irq, void *p)
hw_values.chan,
sizeof(hw_values.chan));
if (ret) {
- dev_err(st->dev,
- "error reading data\n");
- return ret;
+ dev_err(st->dev, "error reading data: %d\n", ret);
+ goto out;
}
iio_push_to_buffers_with_timestamp(indio_dev,
&hw_values,
iio_get_time_ns(indio_dev));
+out:
iio_trigger_notify_done(indio_dev->trig);
return IRQ_HANDLED;