s390/mem_detect: fix detect_memory() error handling

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[ Upstream commit 3400c35a40 ]

Currently if for some reason sclp_early_read_info() fails,
sclp_early_get_memsize() will not set max_physmem_end and it
will stay uninitialized. Any garbage value other than 0 will lead
to detect_memory() taking wrong path or returning a garbage value
as max_physmem_end. To avoid that simply initialize max_physmem_end.

Fixes: 73045a08cf ("s390: unify identity mapping limits handling")
Reported-by: Alexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Vasily Gorbik 2023-01-27 14:03:07 +01:00 • committed by Greg Kroah-Hartman

parent 856fc21954

commit 6ce9a22fc0

1 changed files with 1 additions and 1 deletions

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arch/s390/boot/mem_detect.c

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