i915: fix build warning in intel_dp_get_link_status()

There is a build warning using gcc-11 showing a mis-match in the .h and .c
definitions of intel_dp_get_link_status():
  CC [M]  drivers/gpu/drm/i915/display/intel_dp.o
drivers/gpu/drm/i915/display/intel_dp.c:4139:56: warning: argument 2 of type ‘u8[6]’ {aka ‘unsigned char[6]’} with mismatched bound [-Warray-parameter=]
 4139 | intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATUS_SIZE])
      |                                                     ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from drivers/gpu/drm/i915/display/intel_dp.c:51:
drivers/gpu/drm/i915/display/intel_dp.h:105:57: note: previously declared as ‘u8 *’ {aka ‘unsigned char *’}
  105 | intel_dp_get_link_status(struct intel_dp *intel_dp, u8 *link_status);
      |                                                     ~~~~^~~~~~~~~~~

This was fixed accidentally commit b30edfd8d0b4 ("drm/i915: Switch to LTTPR
non-transparent mode link training") by getting rid of the function entirely,
but that is not a viable backport for a stable kernel, so just fix up the
function definition to remove the build warning entirely.  There is no
functional change for this, and it fixes up one of the last 'make allmodconfig'
build warnings when using gcc-11 on this kernel tree.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index eb8735d039678647318d17a74bc9625e58d59632..abc8c42b8b0c1476e36c3f49728ba6bd80e825d4 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -3634,7 +3634,7 @@ static void chv_dp_post_pll_disable(struct intel_encoder *encoder,
  * link status information
  */
 bool
-intel_dp_get_link_status(struct intel_dp *intel_dp, u8 link_status[DP_LINK_STATUS_SIZE])
+intel_dp_get_link_status(struct intel_dp *intel_dp, u8 *link_status)
 {
        return drm_dp_dpcd_read(&intel_dp->aux, DP_LANE0_1_STATUS, link_status,
                                DP_LINK_STATUS_SIZE) == DP_LINK_STATUS_SIZE;