1 files changed, 15 insertions, 0 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 71e15b73513d..60707814a84b 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -1115,6 +1115,17 @@ static bool ahci_broken_online(struct pci_dev *pdev)
         return pdev->bus->number == (val >> 8) && pdev->devfn == (val & 0xff);
 }
 
+static bool ahci_broken_devslp(struct pci_dev *pdev)
+{
+        /* device with broken DEVSLP but still showing SDS capability */
+        static const struct pci_device_id ids[] = {
+                { PCI_VDEVICE(INTEL, 0x0f23)}, /* Valleyview SoC */
+                {}
+        };
+
+        return pci_match_id(ids, pdev);
+}
+
 #ifdef CONFIG_ATA_ACPI
 static void ahci_gtf_filter_workaround(struct ata_host *host)
 {
@@ -1364,6 +1375,10 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
 
         hpriv->mmio = pcim_iomap_table(pdev)[ahci_pci_bar];
 
+        /* must set flag prior to save config in order to take effect */
+        if (ahci_broken_devslp(pdev))
+                hpriv->flags |= AHCI_HFLAG_NO_DEVSLP;
+
         /* save initial config */
         ahci_pci_save_initial_config(pdev, hpriv);