With 1022:7801 (AMD FCH SATA Controller [AHCI mode]), the identify spins forever. This also occurs with aggressive reset.
Serial output:

[#0 init_stage2(2:2)]: PCI [0000:00:11:00]: AHCI Controller Capabilities = 0xf7229f05, Extended Capabilities = 0x00000000
[#0 SyncTask(3:3)]: SyncTask is running
[#0 init_stage2(2:2)]: PCI [0000:00:11:00]: AHCI Controller reset
[init_stage2(2:2)]: PCI [0000:00:11:00]: AHCI controller reset
[#0 init_stage2(2:2)]: PCI [0000:00:11:00]: AHCI command list entries count - 32
[#0 init_stage2(2:2)]: PCI [0000:00:11:00]: AHCI Controller Version = 0x00010300
[#0 init_stage2(2:2)]: AHCI Port Handler: IRQ 10
[#0 init_stage2(2:2)]: Trying to unregister unused handler (?)
[#0 init_stage2(2:2)]: AHCI Port 1: Command list page at P0x00f3b000
[#0 init_stage2(2:2)]: AHCI Port 1: FIS receive page at P0x00f3b000
[#0 init_stage2(2:2)]: AHCI Port 1: Command list region at V0xc21e9000
[init_stage2(2:2)]: AHCI Port 1: Device detected, Phy enabled
[#0 init_stage2(2:2)]: AHCI Port 1: Initialization. Signature = 0x00000101
[#0 init_stage2(2:2)]: AHCI Port 1: Rebasing.
[#0 init_stage2(2:2)]: AHCI Port 1: Stopping command list processing.
[#0 init_stage2(2:2)]: AHCI Port 1: Stopping FIS receiving.
[#0 init_stage2(2:2)]: AHCI Port 1: Power on. Cold presence detection? false
[#0 init_stage2(2:2)]: AHCI Port 1: Spin up. Staggered spin up? false
[#0 init_stage2(2:2)]: AHCI Port 1: Clearing SATA error register.
[#0 init_stage2(2:2)]: AHCI Port 1: Starting FIS receiving.
[#0 init_stage2(2:2)]: AHCI Port 1: Switching to active state.
[#0 init_stage2(2:2)]: AHCI Port 1: Starting command list processing.
[#0 init_stage2(2:2)]: AHCI Port 1: Spinning until ready.
[#0 init_stage2(2:2)]: AHCI Port 1: unused command header at index 0
[#0 init_stage2(2:2)]: AHCI Port Handler: Get identify metadata physical address of port 0 - 0
[#0 init_stage2(2:2)]: AHCI Port 1: Spinning until ready.
[#0 init_stage2(2:2)]: AHCI Port 1: Marking command header at index 0 as ready to identify device

From PCI list:

[Kernel]: PCI [0000:00:11:00] PCI::ID [1022:7801] class=1 subclass=6 programming_interface=1 revision=64