[libata] ahci_platform: fix DT probing

The change in commit 904c04feaf13ed "ahci_platform: Add the board_ids..."
doesn't work for the DT probing case as platform_get_device_id returns
NULL. Pick the default ahci_port_info in this case.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Acked-by: Anton Vorontsov <cbouatmailru@gmail.com>
Cc: Richard Zhu <richard.zhu@linaro.org>
Cc: linux-ide@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/ata/ahci_platform.c b/drivers/ata/ahci_platform.c
index ec555951176e..43b875810d1b 100644
--- a/drivers/ata/ahci_platform.c
+++ b/drivers/ata/ahci_platform.c
@@ -67,7 +67,7 @@ static int __init ahci_probe(struct platform_device *pdev)
         struct device *dev = &pdev->dev;
         struct ahci_platform_data *pdata = dev_get_platdata(dev);
         const struct platform_device_id *id = platform_get_device_id(pdev);
-        struct ata_port_info pi = ahci_port_info[id->driver_data];
+        struct ata_port_info pi = ahci_port_info[id ? id->driver_data : 0];
         const struct ata_port_info *ppi[] = { &pi, NULL };
         struct ahci_host_priv *hpriv;
         struct ata_host *host;