Re: [PATCH v4 6/8] ata: libata-core: Set ATA_QCFLAG_RTF_FILLED in fill_result_tf()

Niklas Cassel
2024-07-01T21:13:13Z

On Mon, Jul 01, 2024 at 07:57:56PM +0000, Igor Pylypiv wrote:
> ATA_QCFLAG_RTF_FILLED is not specific to ahci and can be used generally
> to check if qc->result_tf contains valid data.
>
> Reviewed-by: Hannes Reinecke <hare@suse.de>
> Reviewed-by: Damien Le Moal <dlemoal@kernel.org>
> Signed-off-by: Igor Pylypiv <ipylypiv@google.com>
> ---
> drivers/ata/libahci.c | 12 ++----------
> drivers/ata/libata-core.c | 8 ++++++++
> 2 files changed, 10 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
> index 83431aae74d8..fdfa7b266218 100644
> --- a/drivers/ata/libahci.c
> +++ b/drivers/ata/libahci.c
> @@ -2075,13 +2075,6 @@ static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
> struct ahci_port_priv *pp = qc->ap->private_data;
> u8 *rx_fis = pp->rx_fis;
>
> - /*
> - * rtf may already be filled (e.g. for successful NCQ commands).
> - * If that is the case, we have nothing to do.
> - */
> - if (qc->flags & ATA_QCFLAG_RTF_FILLED)
> - return;
> -
> if (pp->fbs_enabled)
> rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ;
>
> @@ -2095,7 +2088,6 @@ static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
> !(qc->flags & ATA_QCFLAG_EH)) {
> ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf);
> qc->result_tf.status = (rx_fis + RX_FIS_PIO_SETUP)[15];
> - qc->flags |= ATA_QCFLAG_RTF_FILLED;
> return;
> }
>
> @@ -2118,12 +2110,10 @@ static void ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
> */
> qc->result_tf.status = fis[2];
> qc->result_tf.error = fis[3];
> - qc->flags |= ATA_QCFLAG_RTF_FILLED;
> return;
> }
>
> ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf);
> - qc->flags |= ATA_QCFLAG_RTF_FILLED;
> }
>
> static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask)
> @@ -2158,6 +2148,7 @@ static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask)
> if (qc && ata_is_ncq(qc->tf.protocol)) {
> qc->result_tf.status = status;
> qc->result_tf.error = error;
> + qc->result_tf.flags = qc->tf.flags;
> qc->flags |= ATA_QCFLAG_RTF_FILLED;
> }
> done_mask &= ~(1ULL << tag);
> @@ -2182,6 +2173,7 @@ static void ahci_qc_ncq_fill_rtf(struct ata_port *ap, u64 done_mask)
> fis += RX_FIS_SDB;
> qc->result_tf.status = fis[2];
> qc->result_tf.error = fis[3];
> + qc->result_tf.flags = qc->tf.flags;
> qc->flags |= ATA_QCFLAG_RTF_FILLED;
> }
> done_mask &= ~(1ULL << tag);
> diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
> index 74b59b78d278..949662bc50e4 100644
> --- a/drivers/ata/libata-core.c
> +++ b/drivers/ata/libata-core.c
> @@ -4800,8 +4800,16 @@ static void fill_result_tf(struct ata_queued_cmd *qc)
> {
> struct ata_port *ap = qc->ap;
>
> + /*
> + * rtf may already be filled (e.g. for successful NCQ commands).
> + * If that is the case, we have nothing to do.
> + */
> + if (qc->flags & ATA_QCFLAG_RTF_FILLED)
> + return;
> +
> qc->result_tf.flags = qc->tf.flags;
> ap->ops->qc_fill_rtf(qc);
> + qc->flags |= ATA_QCFLAG_RTF_FILLED;
> }
>
> static void ata_verify_xfer(struct ata_queued_cmd *qc)
> --
> 2.45.2.803.g4e1b14247a-goog
>

Reviewed-by: Niklas Cassel <cassel@kernel.org>