diff options
Diffstat (limited to 'drivers/block/dwc_ahsata.c')
| -rw-r--r-- | drivers/block/dwc_ahsata.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/drivers/block/dwc_ahsata.c b/drivers/block/dwc_ahsata.c index 9a2b547..01a4148 100644 --- 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; } |