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);