Patch "scripts/gdb: bail early if there are no generic PD" has been added to the 5.15-stable tree

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This is a note to let you know that I've just added the patch titled

    scripts/gdb: bail early if there are no generic PD

to the 5.15-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     scripts-gdb-bail-early-if-there-are-no-generic-pd.patch
and it can be found in the queue-5.15 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 1a6346e74cdd511a6e92e4ebb245816b59c27c59
Author: Florian Fainelli <f.fainelli@xxxxxxxxx>
Date:   Thu Mar 23 16:16:57 2023 -0700

    scripts/gdb: bail early if there are no generic PD
    
    [ Upstream commit f19c3c2959e465209ade1a7a699e6cbf4359ce78 ]
    
    Avoid generating an exception if there are no generic power domain(s)
    registered:
    
    (gdb) lx-genpd-summary
    domain                          status          children
        /device                                             runtime status
    ----------------------------------------------------------------------
    Python Exception <class 'gdb.error'>: No symbol "gpd_list" in current context.
    Error occurred in Python: No symbol "gpd_list" in current context.
    (gdb) quit
    
    [f.fainelli@xxxxxxxxx: correctly invoke gdb_eval_or_none]
      Link: https://lkml.kernel.org/r/20230327185746.3856407-1-f.fainelli@xxxxxxxxx
    Link: https://lkml.kernel.org/r/20230323231659.3319941-1-f.fainelli@xxxxxxxxx
    Fixes: 8207d4a88e1e ("scripts/gdb: add lx-genpd-summary command")
    Signed-off-by: Florian Fainelli <f.fainelli@xxxxxxxxx>
    Cc: Jan Kiszka <jan.kiszka@xxxxxxxxxxx>
    Cc: Kieran Bingham <kbingham@xxxxxxxxxx>
    Cc: Leonard Crestez <leonard.crestez@xxxxxxx>
    Cc: Stephen Boyd <sboyd@xxxxxxxxxx>
    Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/scripts/gdb/linux/genpd.py b/scripts/gdb/linux/genpd.py
index 39cd1abd85590..b53649c0a77a6 100644
--- a/scripts/gdb/linux/genpd.py
+++ b/scripts/gdb/linux/genpd.py
@@ -5,7 +5,7 @@
 import gdb
 import sys
 
-from linux.utils import CachedType
+from linux.utils import CachedType, gdb_eval_or_none
 from linux.lists import list_for_each_entry
 
 generic_pm_domain_type = CachedType('struct generic_pm_domain')
@@ -70,6 +70,8 @@ Output is similar to /sys/kernel/debug/pm_genpd/pm_genpd_summary'''
             gdb.write('    %-50s  %s\n' % (kobj_path, rtpm_status_str(dev)))
 
     def invoke(self, arg, from_tty):
+        if gdb_eval_or_none("&gpd_list") is None:
+            raise gdb.GdbError("No power domain(s) registered")
         gdb.write('domain                          status          children\n');
         gdb.write('    /device                                             runtime status\n');
         gdb.write('----------------------------------------------------------------------\n');



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