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

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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@gmail.com: correctly invoke gdb_eval_or_none]
  Link: https://lkml.kernel.org/r/20230327185746.3856407-1-f.fainelli@gmail.com
Link: https://lkml.kernel.org/r/20230323231659.3319941-1-f.fainelli@gmail.com
Fixes: 8207d4a88e ("scripts/gdb: add lx-genpd-summary command")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Leonard Crestez <leonard.crestez@nxp.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Florian Fainelli 2023-03-23 16:16:57 -07:00 committed by Andrew Morton
parent 1d7adbc74c
commit f19c3c2959
1 changed files with 3 additions and 1 deletions
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4
scripts/gdb/linux/genpd.py
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@ -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');