[bug report] drm/sun4i: Add HDMI support

[Dan Carpenter]

Hello Maxime Ripard,

The patch 9c5681011a0c: "drm/sun4i: Add HDMI support" from May 27,
2017, leads to the following static checker warning:

	drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c:62 sun4i_tmds_calc_divider()
	error: uninitialized symbol 'is_double'.

drivers/gpu/drm/sun4i/sun4i_hdmi_tmds_clk.c
    30  static unsigned long sun4i_tmds_calc_divider(unsigned long rate,
    31                                               unsigned long parent_rate,
    32                                               u8 div_offset,
    33                                               u8 *div,
    34                                               bool *half)
    35  {
    36          unsigned long best_rate = 0;
    37          u8 best_m = 0, m;
    38          bool is_double;
                ^^^^^^^^^^^^^^^

    39  
    40          for (m = div_offset ?: 1; m < (16 + div_offset); m++) {
    41                  u8 d;
    42  
    43                  for (d = 1; d < 3; d++) {
    44                          unsigned long tmp_rate;
    45  
    46                          tmp_rate = parent_rate / m / d;
    47  
    48                          if (tmp_rate > rate)
    49                                  continue;
    50  
    51                          if (!best_rate ||
    52                              (rate - tmp_rate) < (rate - best_rate)) {
    53                                  best_rate = tmp_rate;
    54                                  best_m = m;
    55                                  is_double = d;
                                        ^^^^^^^^^^^^^^
The "is_double" variable is a bool and d is 1-2 so this would be more
readable as "is_double = true;".

    56                          }
    57                  }
    58          }
    59  
    60          if (div && half) {
    61                  *div = best_m;
    62                  *half = is_double;
                        ^^^^^^^^^^^^^^^^^^
This is either true or uninitialized.

    63          }
    64  
    65          return best_rate;
    66  }

regards,
dan carpenter