Merge branch 'master' of git://git.denx.de/u-boot-usb

[karo-tx-uboot.git] / drivers / block / dwc_ahsata.c

diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
index 9a2b547af2d3f0bf80d2ee0a6c0f88ddae061904..01a4148a5201ebe4738fdd399d5354068e4c614c 100644 (file)
--- a/drivers/block/dwc_ahsata.c
+++ b/drivers/block/dwc_ahsata.c
@@ -594,22 +594,24 @@ int init_sata(int dev)
 
 int reset_sata(int dev)
 {
-       struct ahci_probe_ent *probe_ent =
-                       (struct ahci_probe_ent *)sata_dev_desc[dev].priv;
-       struct sata_host_regs *host_mmio =
-                       (struct sata_host_regs *)probe_ent->mmio_base;
+       struct ahci_probe_ent *probe_ent;
+       struct sata_host_regs *host_mmio;
 
        if (dev < 0 || dev > (CONFIG_SYS_SATA_MAX_DEVICE - 1)) {
                printf("The sata index %d is out of ranges\n\r", dev);
                return -1;
        }
 
+       probe_ent = (struct ahci_probe_ent *)sata_dev_desc[dev].priv;
+       if (NULL == probe_ent)
+               /* not initialized, so nothing to reset */
+               return 0;
+
+       host_mmio = (struct sata_host_regs *)probe_ent->mmio_base;
        setbits_le32(&host_mmio->ghc, SATA_HOST_GHC_HR);
        while (readl(&host_mmio->ghc) & SATA_HOST_GHC_HR)
                udelay(100);
 
-       disable_sata_clock();
-
        return 0;
 }