✗ CI.checkpatch: warning for Document GuC submission backend (rev2)

[Patchwork]

== Series Details ==

Series: Document GuC submission backend (rev2)
URL   : https://patchwork.freedesktop.org/series/153000/
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
553439844b6500767ce8aef522cfe9fbb7ece541
+ cd /kernel
+ git config --global --add safe.directory /kernel
+ git log -n1
commit 4f5ba139e2f6775b0fd2c305d6a528a32a69836c
Author: Matthew Brost <matthew.brost at intel.com>
Date:   Fri Aug 15 20:36:05 2025 -0700

    drm/xe/guc: Document GuC submission backend
    
    Add kernel-doc to xe_guc_submit.c describing the submission path,
    the per-queue single-threaded model with pause/resume, the driver shadow
    state machine and lost-H2G replay, job timeout handling, recovery flows
    (GT reset, PM resume, VF resume), and reclaim constraints.
    
    v2:
     - Mirror tweaks for clarity
     - Add new doc to Xe rst files
    
    Signed-off-by: <Matthew Brost matthew.brost at intel.com>
+ /mt/dim checkpatch 2dd142b066d35475dab4eff4052ca931c7c210fe drm-intel
4f5ba139e2f6 drm/xe/guc: Document GuC submission backend
-:15: ERROR:BAD_SIGN_OFF: Unrecognized email address: '<Matthew Brost matthew.brost at intel.com>'
#15: 
Signed-off-by: <Matthew Brost matthew.brost at intel.com>

-:27: WARNING:FILE_PATH_CHANGES: added, moved or deleted file(s), does MAINTAINERS need updating?
#27: 
new file mode 100644

-:271: ERROR:NO_AUTHOR_SIGN_OFF: Missing Signed-off-by: line by nominal patch author 'Matthew Brost <matthew.brost at intel.com>'

total: 2 errors, 1 warnings, 0 checks, 239 lines checked