RE: [PATCH] [SCSI] LIBSAS: fix libsas link error issue

[Xiangliang Yu]

> [Jack Wang] 
>It's the same, sas_ex_get_linkrate use DISCOVER response as linkrate.
But the function have problem, actually, the error statement is:
child->linkrate = min(parent_phy->linkrate, child->max_linkrate); 
its mean like this:
child->linkrate = min(child_phy->linkrate, max(parent->max_linkrate,child_phy->linkrate));
and if parent->max_linkrate(3Gbps) is less than child_phy->linkrate(6Gbps),
the statement will be change this:
child->linkrate = child_phy->linkrate, forget the parent linkrate.

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