This is a note to let you know that I've just added the patch titled
iio: adis16475: fix deadlock on frequency set
to my staging git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging.git in the staging-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 9da1b86865ab4376408c58cd9fec332c8bdb5c73 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Nuno=20S=C3=A1?= nuno.sa@analog.com Date: Mon, 20 Sep 2021 11:00:47 +0200 Subject: iio: adis16475: fix deadlock on frequency set MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit
With commit 39c024b51b560 ("iio: adis16475: improve sync scale mode handling"), two deadlocks were introduced: 1) The call to 'adis_write_reg_16()' was not changed to it's unlocked version. 2) The lock was not being released on the success path of the function.
This change fixes both these issues.
Fixes: 39c024b51b560 ("iio: adis16475: improve sync scale mode handling") Signed-off-by: Nuno Sá nuno.sa@analog.com Reviewed-by: Alexandru Ardelean ardeleanalex@gmail.com Link: https://lore.kernel.org/r/20210920090047.74903-1-nuno.sa@analog.com Cc: Stable@vger.kernel.org Signed-off-by: Jonathan Cameron Jonathan.Cameron@huawei.com --- drivers/iio/imu/adis16475.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/imu/adis16475.c b/drivers/iio/imu/adis16475.c index eb48102f9424..287fff39a927 100644 --- a/drivers/iio/imu/adis16475.c +++ b/drivers/iio/imu/adis16475.c @@ -353,10 +353,11 @@ static int adis16475_set_freq(struct adis16475 *st, const u32 freq) if (dec > st->info->max_dec) dec = st->info->max_dec;
- ret = adis_write_reg_16(&st->adis, ADIS16475_REG_DEC_RATE, dec); + ret = __adis_write_reg_16(&st->adis, ADIS16475_REG_DEC_RATE, dec); if (ret) goto error;
+ adis_dev_unlock(&st->adis); /* * If decimation is used, then gyro and accel data will have meaningful * bits on the LSB registers. This info is used on the trigger handler.