From: Hans de Goede <hdegoede@xxxxxxxxxx> ov8865_state_init() calls ov8865_state_mipi_configure() which uses __v4l2_ctrl_s_ctrl[_int64](). This means that sensor->mutex (which is also sensor->ctrls.handler.lock) must be locked before calling ov8865_state_init(). Note ov8865_state_mipi_configure() is also used in other places where the lock is already held so it cannot be changed itself. This fixes the following lockdep kernel WARN: [ 13.233413] ------------[ cut here ]------------ [ 13.233421] WARNING: CPU: 0 PID: 8 at drivers/media/v4l2-core/v4l2-ctrls-api.c:833 __v4l2_ctrl_s_ctrl+0x4d/0x60 [videodev] ... [ 13.234063] Call Trace: [ 13.234074] ov8865_state_configure+0x98b/0xc00 [ov8865] [ 13.234095] ov8865_probe+0x4b1/0x54c [ov8865] [ 13.234117] i2c_device_probe+0x13c/0x2d0 Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> --- Changes in v3: - New patch fixing a problem Hans noticed - thank you! drivers/media/i2c/ov8865.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c index 685539744041..27179f1d5cb8 100644 --- a/drivers/media/i2c/ov8865.c +++ b/drivers/media/i2c/ov8865.c @@ -3073,7 +3073,9 @@ static int ov8865_probe(struct i2c_client *client) if (ret) goto error_mutex; + mutex_lock(&sensor->mutex); ret = ov8865_state_init(sensor); + mutex_unlock(&sensor->mutex); if (ret) goto error_ctrls; -- 2.25.1
