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SubjectRe: [PATCH v1] ata: ahci: Disable SXS for Hisilicon Kunpeng920
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kindly ping.


Hi, Jens,  are there any further comments from you?

Two weeks from your first comment now.


And it's a bugfix for our SoC, So the customer is asking whether this
patch is merged or not.

They want to pull back.


Thanks

Jiaxing


On 2021/3/12 18:24, Luo Jiaxing wrote:
> From: Xingui Yang <yangxingui@huawei.com>
>
> On Hisilicon Kunpeng920, ESP is set to 1 by default for all ports of
> SATA controller. In some scenarios, some ports are not external SATA ports,
> and it cause disks connected to these ports to be identified as removable
> disks. So disable the SXS capability on the software side to prevent users
> from mistakenly considering non-removable disks as removable disks and
> performing related operations.
>
> Signed-off-by: Xingui Yang <yangxingui@huawei.com>
> Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
> Reviewed-by: John Garry <john.garry@huawei.com>
> ---
> drivers/ata/ahci.c | 5 +++++
> drivers/ata/ahci.h | 1 +
> drivers/ata/libahci.c | 5 +++++
> 3 files changed, 11 insertions(+)
>
> diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
> index 00ba8e5..33192a8 100644
> --- a/drivers/ata/ahci.c
> +++ b/drivers/ata/ahci.c
> @@ -1772,6 +1772,11 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
> hpriv->flags |= AHCI_HFLAG_NO_DEVSLP;
>
> #ifdef CONFIG_ARM64
> + if (pdev->vendor == PCI_VENDOR_ID_HUAWEI &&
> + pdev->device == 0xa235 &&
> + pdev->revision < 0x30)
> + hpriv->flags |= AHCI_HFLAG_NO_SXS;
> +
> if (pdev->vendor == 0x177d && pdev->device == 0xa01c)
> hpriv->irq_handler = ahci_thunderx_irq_handler;
> #endif
> diff --git a/drivers/ata/ahci.h b/drivers/ata/ahci.h
> index 98b8baa..d1f284f 100644
> --- a/drivers/ata/ahci.h
> +++ b/drivers/ata/ahci.h
> @@ -242,6 +242,7 @@ enum {
> suspend/resume */
> AHCI_HFLAG_IGN_NOTSUPP_POWER_ON = (1 << 27), /* ignore -EOPNOTSUPP
> from phy_power_on() */
> + AHCI_HFLAG_NO_SXS = (1 << 28), /* SXS not supported */
>
> /* ap->flags bits */
>
> diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c
> index ea5bf5f..fec2e97 100644
> --- a/drivers/ata/libahci.c
> +++ b/drivers/ata/libahci.c
> @@ -493,6 +493,11 @@ void ahci_save_initial_config(struct device *dev, struct ahci_host_priv *hpriv)
> cap |= HOST_CAP_ALPM;
> }
>
> + if ((cap & HOST_CAP_SXS) && (hpriv->flags & AHCI_HFLAG_NO_SXS)) {
> + dev_info(dev, "controller does not support SXS, disabling CAP_SXS\n");
> + cap &= ~HOST_CAP_SXS;
> + }
> +
> if (hpriv->force_port_map && port_map != hpriv->force_port_map) {
> dev_info(dev, "forcing port_map 0x%x -> 0x%x\n",
> port_map, hpriv->force_port_map);

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