On 2022/02/01 16:12, Paul Menzel wrote: > The 200 ms delay before debouncing the PHY in `sata_link_resume()` is > not needed for the Marvell 88SE9235. > > $ lspci -nn -s 0021:0e:00.0 > 0021:0e:00.0 SATA controller [0106]: Marvell Technology Group Ltd. 88SE9235 PCIe 2.0 x2 4-port SATA 6 Gb/s Controller [1b4b:9235] (rev 11) > > So, remove it. Tested on IBM S822LC with current Linux 5.17-rc1: > > Currently, without this patch (with 200 ms delay), device probe for ata1 > takes 485 ms: > > [ 3.358158] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000100 irq 39 > [ 3.358175] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000180 irq 39 > [ 3.358191] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000200 irq 39 > [ 3.358207] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3fe881000280 irq 39 > […] > [ 3.677542] ata3: SATA link down (SStatus 0 SControl 300) > [ 3.677719] ata4: SATA link down (SStatus 0 SControl 300) > [ 3.839242] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300) > [ 3.839828] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133 > [ 3.840029] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA > [ 3.841796] ata2.00: configured for UDMA/133 > [ 3.843231] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) > [ 3.844083] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133 > [ 3.844313] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA > [ 3.846043] ata1.00: configured for UDMA/133 > > With this patch (no delay) device probe for ata1 takes 273 ms: > > [ 3.624259] ata1: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000100 irq 39 > [ 3.624436] ata2: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000180 irq 39 > [ 3.624452] ata3: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000200 irq 39 > [ 3.624468] ata4: SATA max UDMA/133 abar m2048@0x3fe881000000 port 0x3f e881000280 irq 39 > […] > [ 3.731966] ata3: SATA link down (SStatus 0 SControl 300) > [ 3.732069] ata4: SATA link down (SStatus 0 SControl 300) > [ 3.897448] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300) > [ 3.897678] ata2: SATA link up 6.0 Gbps (SStatus 133 SControl 300) > [ 3.898140] ata1.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133 > [ 3.898175] ata2.00: ATA-10: ST1000NX0313 00LY266 00LY265IBM, BE33, max UDMA/133 > [ 3.898287] ata1.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA > [ 3.898349] ata2.00: 1953525168 sectors, multi 0: LBA48 NCQ (depth 32), AA > [ 3.900070] ata1.00: configured for UDMA/133 > [ 3.900166] ata2.00: configured for UDMA/133 > > Signed-off-by: Paul Menzel <pmenzel@xxxxxxxxxxxxx> > --- > v2: address comments for commit message (but forgot v2 tag) > v3: resend with v3 tag in subject line/commit message summary > > drivers/ata/ahci.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c > index ab5811ef5a53..edca4e8fd44e 100644 > --- a/drivers/ata/ahci.c > +++ b/drivers/ata/ahci.c > @@ -582,6 +582,8 @@ static const struct pci_device_id ahci_pci_tbl[] = { > .driver_data = board_ahci_yes_fbs }, > { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9230), > .driver_data = board_ahci_yes_fbs }, > + { PCI_DEVICE(PCI_VENDOR_ID_MARVELL_EXT, 0x9235), > + .driver_data = board_ahci_no_debounce_delay }, > { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0642), /* highpoint rocketraid 642L */ > .driver_data = board_ahci_yes_fbs }, > { PCI_DEVICE(PCI_VENDOR_ID_TTI, 0x0645), /* highpoint rocketraid 644L */ Looks good. Will apply to for-5.18. -- Damien Le Moal Western Digital Research