1 files changed, 10 insertions, 27 deletions

diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index bd241767caea..e3c7b312287a 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -586,35 +586,18 @@ static void ahci_power_down(void __iomem *port_mmio, u32 cap)
 {
         u32 cmd, scontrol;
 
-        cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
-
-        if (cap & HOST_CAP_SSC) {
-                /* enable transitions to slumber mode */
-                scontrol = readl(port_mmio + PORT_SCR_CTL);
-                if ((scontrol & 0x0f00) > 0x100) {
-                        scontrol &= ~0xf00;
-                        writel(scontrol, port_mmio + PORT_SCR_CTL);
-                }
-
-                /* put device into slumber mode */
-                writel(cmd | PORT_CMD_ICC_SLUMBER, port_mmio + PORT_CMD);
-
-                /* wait for the transition to complete */
-                ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_ICC_SLUMBER,
-                                  PORT_CMD_ICC_SLUMBER, 1, 50);
-        }
+        if (!(cap & HOST_CAP_SSS))
+                return;
 
-        /* put device into listen mode */
-        if (cap & HOST_CAP_SSS) {
-                /* first set PxSCTL.DET to 0 */
-                scontrol = readl(port_mmio + PORT_SCR_CTL);
-                scontrol &= ~0xf;
-                writel(scontrol, port_mmio + PORT_SCR_CTL);
+        /* put device into listen mode, first set PxSCTL.DET to 0 */
+        scontrol = readl(port_mmio + PORT_SCR_CTL);
+        scontrol &= ~0xf;
+        writel(scontrol, port_mmio + PORT_SCR_CTL);
 
-                /* then set PxCMD.SUD to 0 */
-                cmd &= ~PORT_CMD_SPIN_UP;
-                writel(cmd, port_mmio + PORT_CMD);
-        }
+        /* then set PxCMD.SUD to 0 */
+        cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
+        cmd &= ~PORT_CMD_SPIN_UP;
+        writel(cmd, port_mmio + PORT_CMD);
 }
 
 static void ahci_init_port(void __iomem *port_mmio, u32 cap,