iio: imu: st_lsm6dsx: add error logs to st_lsm6dsx_read_fifo()

Add debug info to error conditions in st_lsm6dsx_read_fifo routine

Suggested-by: Jorge Ramirez-Ortiz <jramirez@baylibre.com>
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@redhat.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
index 4994f92..7589f2a 100644 (file)
--- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
@@ -298,8 +298,11 @@ static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
        err = regmap_bulk_read(hw->regmap,
                               hw->settings->fifo_ops.fifo_diff.addr,
                               &fifo_status, sizeof(fifo_status));
-       if (err < 0)
+       if (err < 0) {
+               dev_err(hw->dev, "failed to read fifo status (err=%d)\n",
+                       err);
                return err;
+       }
 
        if (fifo_status & cpu_to_le16(ST_LSM6DSX_FIFO_EMPTY_MASK))
                return 0;
@@ -313,8 +316,12 @@ static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
 
        for (read_len = 0; read_len < fifo_len; read_len += pattern_len) {
                err = st_lsm6dsx_read_block(hw, hw->buff, pattern_len);
-               if (err < 0)
+               if (err < 0) {
+                       dev_err(hw->dev,
+                               "failed to read pattern from fifo (err=%d)\n",
+                               err);
                        return err;
+               }
 
                /*
                 * Data are written to the FIFO with a specific pattern
@@ -385,8 +392,11 @@ static int st_lsm6dsx_read_fifo(struct st_lsm6dsx_hw *hw)
 
        if (unlikely(reset_ts)) {
                err = st_lsm6dsx_reset_hw_ts(hw);
-               if (err < 0)
+               if (err < 0) {
+                       dev_err(hw->dev, "failed to reset hw ts (err=%d)\n",
+                               err);
                        return err;
+               }
        }
        return read_len;
 }