Remove this warning:
drivers/staging/media/bcm2048/radio-bcm2048.c: In function 'bcm2048_set_rds_no_lock':
drivers/staging/media/bcm2048/radio-bcm2048.c:467:6: warning: variable 'err' set but not used [-Wunused-but-set-variable]
  int err;
      ^~~
By returning the error code.
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
                                           flags);
                memset(&bdev->rds_info, 0, sizeof(bdev->rds_info));
        }
+       if (err)
+               return err;
 
        err = bcm2048_send_command(bdev, BCM2048_I2C_FM_RDS_SYSTEM,
                                   bdev->cache_fm_rds_system);