sata: fix reset_sata for dwc_ahsata

- fix crash when sata device is not initialized
- remove disable_sata_clock() since it is not clear which clock for which
  device should be disabled here
- call disable_sata_clock() for mx6 in preboot_os instead

Signed-off-by: Soeren Moch <smoch@web.de>
Acked-by: Nikita Kiryanov <nikita@compulab.co.il>
Tested-by: Nikita Kiryanov <nikita@compulab.co.il>

diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c
index b58df7d..28ccd29 100644 (file)
--- a/arch/arm/imx-common/cpu.c
+++ b/arch/arm/imx-common/cpu.c
@@ -206,6 +206,9 @@ void arch_preboot_os(void)
 {
 #if defined(CONFIG_CMD_SATA)
        sata_stop();
+#if defined(CONFIG_MX6)
+       disable_sata_clock();
+#endif
 #endif
 #if defined(CONFIG_VIDEO_IPUV3)
        /* disable video before launching O/S */

diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c
index 9a2b547..01a4148 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;
 }