✗ CI.checkpatch: warning for drm/i915/mst: fix INT_MAX to .4 fixed point conversion mistake

[Patchwork]

== Series Details ==

Series: drm/i915/mst: fix INT_MAX to .4 fixed point conversion mistake
URL   : https://patchwork.freedesktop.org/series/144325/
State : warning

== Summary ==

+ KERNEL=/kernel
+ git clone https://gitlab.freedesktop.org/drm/maintainer-tools mt
Cloning into 'mt'...
warning: redirecting to https://gitlab.freedesktop.org/drm/maintainer-tools.git/
+ git -C mt rev-list -n1 origin/master
30ab6715fc09baee6cc14cb3c89ad8858688d474
+ cd /kernel
+ git config --global --add safe.directory /kernel
+ git log -n1
commit b780a35d785767228c5b017e13bcf6bc2c0f696a
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Tue Feb 4 17:37:17 2025 +0200

    drm/i915/mst: fix INT_MAX to .4 fixed point conversion mistake
    
    intel_dp_mtp_tu_compute_config() conversion to use .4 fixed point didn't
    take into account that intel_dp_mst_max_dpt_bpp() may return INT_MAX
    when the transport limitation is not relevant. Converting INT_MAX to .4
    fixed point results in -1.0, which then gets used as if it were a real
    max BPP value:
    
    i915 0000:00:02.0: [drm:intel_dp_mtp_tu_compute_config [i915]] Limiting bpp to max DPT bpp (24.0000 -> -1.0000)
    i915 0000:00:02.0: [drm:intel_dp_mtp_tu_compute_config [i915]] Looking for slots in range min bpp 18.0000 max bpp -1.0000
    
    Just return 0 for "no max DPT BPP", and handle it explicitly.
    
    Fixes: 67782bf6e8a6 ("drm/i915/mst: Convert intel_dp_mtp_tu_compute_config() to .4 format")
    Cc: Imre Deak <imre.deak at intel.com>
    Signed-off-by: Jani Nikula <jani.nikula at intel.com>
    Reviewed-by: Imre Deak <imre.deak at intel.com>
+ /mt/dim checkpatch ac87843456aa558a665df43aa62c03eaf7701bcb drm-intel
b780a35d7857 drm/i915/mst: fix INT_MAX to .4 fixed point conversion mistake
-:13: WARNING:COMMIT_LOG_LONG_LINE: Prefer a maximum 75 chars per line (possible unwrapped commit description?)
#13: 
i915 0000:00:02.0: [drm:intel_dp_mtp_tu_compute_config [i915]] Limiting bpp to max DPT bpp (24.0000 -> -1.0000)

total: 0 errors, 1 warnings, 0 checks, 16 lines checked