[Skiboot] [PATCH] hdata/iohub: Check IOHUB child count before using

[Stewart Smith]

Vasant Hegde <hegdevasant at linux.vnet.ibm.com> writes:
> ..else we endup getting below calltrace in older system.
>
> [  169.179598388,3] HDIF: child array idx out of range!
> CPU 085c Backtrace:
>  S: 0000000033d739b0 R: 00000000300136e8   .backtrace+0x40
>  S: 0000000033d73a50 R: 00000000300a1510   .HDIF_child_arr+0x34
>  S: 0000000033d73ac0 R: 00000000300a47a8   .io_parse+0x708
>  S: 0000000033d73c80 R: 000000003009f4ec   .parse_hdat+0x177c
>  S: 0000000033d73e30 R: 0000000030014750   .main_cpu_entry+0x148
>  S: 0000000033d73f00 R: 0000000030002690   boot_entry+0x198
>
> Fixes: ad484081 (hdata: Parse IOSLOT information)
> CC: Oliver O'Halloran <oohall at gmail.com>
> Signed-off-by: Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
> ---
>  hdata/iohub.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Seems ot work for me, which is great!

Merged to master as of 7b51ce6fab530fa5d6b2d638dcaf5e3311bfc1a6
-- 
Stewart Smith
OPAL Architect, IBM.