I can split my issue into two cases: 1. My HDD inside DVD enclosure is not discovered. Then I have to reset stata device 3 or 4 times by "echo "- - -" > /sys/class/scsi_host/host1/scan" command
2. After stata resets, function sata_down_spd_limit() is called. * In Linux 4.14 this function set up link->sata_spd_limit from value 4294967295 to value 1. After this set up, HDD is discovered and works fine. * Since patch 4.15.0-rc4 value of link->sata_spd_limit is not changed, so HDD is not working at all. Some debug information: Inside function sata_down_spd_limit() is called ata_sstatus_online() and it returns 0 that means link is offline. Value of "link->sata_spd" and "spd" is 0, value of "link->sata_spd_limit" is 4294967295 and value of "bit" is 31. After statement "mask &= ~(1 << bit);" mask is set to 2147483647 Because "spd" is 0, then statement "if (spd > 1)" is not pass and "else return -EINVAL;" is called. Patch "else link->sata_spd_limit = mask;" doesn't work, because mask is 2147483647 and it seems to not be valid value (I think it should be 1, 2, or 4). -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1783906 Title: Linux 4.15 and onwards fails to initialize some hard drives To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1783906/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
