The code with uses the dummy var is commented out. So,
coment out its definition/initialization.

Fix this warning:

  drivers/staging/media/atomisp/i2c/atomisp-gc2235.c: In function 
'gc2235_get_intg_factor':
  drivers/staging/media/atomisp/i2c/atomisp-gc2235.c:249:26: warning: variable 
'dummy' set but not used [-Wunused-but-set-variable]
    u16 reg_val, reg_val_h, dummy;
                            ^~~~~

Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
---
 drivers/staging/media/atomisp/i2c/atomisp-gc2235.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c 
b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
index 93f9c618f3d8..4b6b6568b3cf 100644
--- a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
+++ b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
@@ -246,7 +246,7 @@ static int gc2235_get_intg_factor(struct i2c_client *client,
        struct v4l2_subdev *sd = i2c_get_clientdata(client);
        struct gc2235_device *dev = to_gc2235_sensor(sd);
        struct atomisp_sensor_mode_data *buf = &info->data;
-       u16 reg_val, reg_val_h, dummy;
+       u16 reg_val, reg_val_h;
        int ret;
 
        if (!info)
@@ -316,7 +316,9 @@ static int gc2235_get_intg_factor(struct i2c_client *client,
        if (ret)
                return ret;
 
-       dummy = (reg_val_h << 8) | reg_val;
+#if 0
+       u16 dummy = (reg_val_h << 8) | reg_val;
+#endif
 
        ret = gc2235_read_reg(client, GC2235_8BIT,
                                        GC2235_SH_DELAY_H, &reg_val_h);
-- 
2.14.3

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