pata_cs5520: suspend/resume

The CS5520 isn't just an ATA controller and we must not
pci_disable_device it as it turns into pci_disable_computer.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 25 insertions, 1 deletions

diff --git a/drivers/ata/pata_cs5520.c b/drivers/ata/pata_cs5520.c
index 1ce8fcfd7826..b49d8b70577a 100644
--- a/drivers/ata/pata_cs5520.c
+++ b/drivers/ata/pata_cs5520.c
@@ -325,6 +325,30 @@ static int cs5520_reinit_one(struct pci_dev *pdev)
                 pci_write_config_byte(pdev, 0x60, pcicfg | 0x40);
         return ata_pci_device_resume(pdev);
 }
+
+/**
+ *      cs5520_pci_device_suspend       -       device suspend
+ *      @pdev: PCI device
+ *
+ *      We have to cut and waste bits from the standard method because
+ *      the 5520 is a bit odd and not just a pure ATA device. As a result
+ *      we must not disable it. The needed code is short and this avoids
+ *      chip specific mess in the core code.
+ */
+
+static int cs5520_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
+{
+        struct ata_host *host = dev_get_drvdata(&pdev->dev);
+        int rc = 0;
+
+        rc = ata_host_suspend(host, mesg);
+        if (rc)
+                return rc;
+
+        pci_save_state(pdev);
+        return 0;
+}
+ 
 /* For now keep DMA off. We can set it for all but A rev CS5510 once the
    core ATA code can handle it */
 
@@ -340,7 +364,7 @@ static struct pci_driver cs5520_pci_driver = {
         .id_table       = pata_cs5520,
         .probe          = cs5520_init_one,
         .remove         = cs5520_remove_one,
-        .suspend        = ata_pci_device_suspend,
+        .suspend        = cs5520_pci_device_suspend,
         .resume         = cs5520_reinit_one,
 };