Commit 3400c35a authored by Vasily Gorbik's avatar Vasily Gorbik Committed by Heiko Carstens
Browse files

s390/mem_detect: fix detect_memory() error handling 



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: 73045a08 ("s390: unify identity mapping limits handling")
Reported-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: default avatarVasily Gorbik <gor@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 03d49073

arch/s390/boot/mem_detect.c

+1 −1
Original line number Diff line number Diff line
@@ -165,7 +165,7 @@ static void search_mem_end(void) 


unsigned long detect_memory(void)

{

	unsigned long max_physmem_end;

	unsigned long max_physmem_end = 0;



	sclp_early_get_memsize(&max_physmem_end);