Still happening to me with 3.19 final.

Feb 20 12:33:26 Ubuntu kernel: [    0.822414] ahci 0000:06:00.0: SSS flag set, parallel bus scan disabled
Feb 20 12:33:26 Ubuntu kernel: [    0.822461] ahci 0000:06:00.0: AHCI 0001.0200 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
Feb 20 12:33:26 Ubuntu kernel: [    0.822463] ahci 0000:06:00.0: flags: 64bit ncq sntf stag led clo pmp pio slum part ccc 
Feb 20 12:33:26 Ubuntu kernel: [    0.822646] scsi host6: ahci
Feb 20 12:33:26 Ubuntu kernel: [    0.822712] scsi host7: ahci
Feb 20 12:33:26 Ubuntu kernel: [    0.822740] ata7: SATA max UDMA/133 abar m512@0xdfd00000 port 0xdfd00100 irq 42
Feb 20 12:33:26 Ubuntu kernel: [    0.822742] ata8: SATA max UDMA/133 abar m512@0xdfd00000 port 0xdfd00180 irq 42
Feb 20 12:33:26 Ubuntu kernel: [    0.822836] ahci 0000:0a:00.0: SSS flag set, parallel bus scan disabled
Feb 20 12:33:26 Ubuntu kernel: [    0.822863] ahci 0000:0a:00.0: AHCI 0001.0200 32 slots 2 ports 6 Gbps 0x3 impl SATA mode
Feb 20 12:33:26 Ubuntu kernel: [    0.822864] ahci 0000:0a:00.0: flags: 64bit ncq sntf stag led clo pmp pio slum part ccc 
Feb 20 12:33:26 Ubuntu kernel: [    0.823042] scsi host8: ahci
Feb 20 12:33:26 Ubuntu kernel: [    0.823106] scsi host9: ahci
Feb 20 12:33:26 Ubuntu kernel: [    0.823131] ata9: SATA max UDMA/133 abar m512@0xdfc00000 port 0xdfc00100 irq 43
Feb 20 12:33:26 Ubuntu kernel: [    0.823133] ata10: SATA max UDMA/133 abar m512@0xdfc00000 port 0xdfc00180 irq 43
Feb 20 12:33:26 Ubuntu kernel: [    0.841369] usb 1-1: new high-speed USB device number 2 using xhci_hcd
Feb 20 12:33:26 Ubuntu kernel: [    0.841384] xhci_hcd 0000:00:14.0: ERROR: unexpected setup address command completion code 0x0.
Feb 20 12:33:26 Ubuntu kernel: [    0.909474] usb 5-1: new high-speed USB device number 2 using ehci-pci
Feb 20 12:33:26 Ubuntu kernel: [    0.925498] usb 6-1: new high-speed USB device number 2 using ehci-pci
Feb 20 12:33:26 Ubuntu kernel: [    1.042006] usb 5-1: New USB device found, idVendor=8087, idProduct=8009
Feb 20 12:33:26 Ubuntu kernel: [    1.042008] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Feb 20 12:33:26 Ubuntu kernel: [    1.042145] hub 5-1:1.0: USB hub found
Feb 20 12:33:26 Ubuntu kernel: [    1.042255] hub 5-1:1.0: 6 ports detected
Feb 20 12:33:26 Ubuntu kernel: [    1.049688] xhci_hcd 0000:00:14.0: Setup ERROR: setup address command for slot 1.
Feb 20 12:33:26 Ubuntu kernel: [    1.058042] usb 6-1: New USB device found, idVendor=8087, idProduct=8001
Feb 20 12:33:26 Ubuntu kernel: [    1.058044] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0
Feb 20 12:33:26 Ubuntu kernel: [    1.058181] hub 6-1:1.0: USB hub found
Feb 20 12:33:26 Ubuntu kernel: [    1.058291] hub 6-1:1.0: 8 ports detected
Feb 20 12:33:26 Ubuntu kernel: [    1.063026] usb 1-1: New USB device found, idVendor=174c, idProduct=2074
Feb 20 12:33:26 Ubuntu kernel: [    1.063028] usb 1-1: New USB device strings: Mfr=2, Product=3, SerialNumber=0
Feb 20 12:33:26 Ubuntu kernel: [    1.063029] usb 1-1: Product: ASM107x
Feb 20 12:33:26 Ubuntu kernel: [    1.063030] usb 1-1: Manufacturer: ASUS Tek.
Feb 20 12:33:26 Ubuntu kernel: [    1.063352] hub 1-1:1.0: USB hub found
Feb 20 12:33:26 Ubuntu kernel: [    1.063492] hub 1-1:1.0: 4 ports detected