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[kvm-unit-tests,0/1] Fixing infinite loop on SCLP READ SCP INFO error

Message ID 20230424174218.64145-1-pmorel@linux.ibm.com (mailing list archive)
Headers show
Series Fixing infinite loop on SCLP READ SCP INFO error | expand

Message

Pierre Morel April 24, 2023, 5:42 p.m. UTC 
Aborting on SCLP READ SCP INFO error leads to a deadloop.

The loop is:
abort() -> exit() -> smp_teardown() -> smp_query_num_cpus() ->
sclp_get_cpu_num() -> assert() -> abort()

Since smp_setup() is done after sclp_read_info() inside setup() this
loop only happens when only the start processor is running.
Let sclp_get_cpu_num() return 1 in this case.

Fixes: 52076a63d569 ("s390x: Consolidate sclp read info")


Pierre Morel (1):
  s390x: sclp: consider monoprocessor on read_info error

 lib/s390x/sclp.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)