On 5/12/22 2:17 AM, Serge Semin wrote: > Having greater than (AHCI_MAX_PORTS = 32) ports detected isn't that Having greater than AHCI_MAX_PORTS (32) ports detected? > critical from the further AHCI-platform initialization point of view since > exceeding the ports upper limit will cause allocating more resources than > will be used afterwards. But detecting too many child DT-nodes doesn't > seem right since it's very unlikely to have it on an ordinary platform. In > accordance with the AHCI specification there can't be more than 32 ports > implemented at least due to having the CAP.NP field of 4 bits wide and the It's 5 bits wide, actually... > PI register of dword size. Thus if such situation is found the DTB must > have been corrupted and the data read from it shouldn't be reliable. Let's > consider that as an erroneous situation and halt further resources > allocation. > > Note it's logically more correct to have the nports set only after the > initialization value is checked for being sane. So while at it let's make > sure nports is assigned with a correct value. > > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> [...] MBR, Sergey
