From: Xingui Yang yangxingui@huawei.com
[ Upstream commit 234e6d2c18f5b080cde874483c4c361f3ae7cffe ]
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 Link: https://lore.kernel.org/r/1615544676-61926-1-git-send-email-luojiaxing@huawe... Signed-off-by: Jens Axboe axboe@kernel.dk Signed-off-by: Sasha Levin sashal@kernel.org --- 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 00ba8e5a1ccc..33192a8f687d 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 98b8baa47dc5..d1f284f0c83d 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 ea5bf5f4cbed..fec2e9754aed 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);