SATA: Blacklisting of systems that spin off disks during ACPI power off

[linux-2.6-omap-h63xx.git] / drivers / ata / libata-scsi.c

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 4040d8b532165b791fef71902b44a5905e21303a..3c4c5ae277ba583074a2f407fe5cf25caf2b0320 100644 (file)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -46,6 +46,7 @@
 #include <linux/libata.h>
 #include <linux/hdreg.h>
 #include <linux/uaccess.h>
+#include <linux/suspend.h>
 
 #include "libata.h"
 
@@ -423,9 +424,9 @@ int ata_std_bios_param(struct scsi_device *sdev, struct block_device *bdev,
  *     RETURNS:
  *     Zero on success, negative errno on error.
  */
-static int ata_get_identity(struct scsi_device *sdev, void __user *arg)
+static int ata_get_identity(struct ata_port *ap, struct scsi_device *sdev,
+                           void __user *arg)
 {
-       struct ata_port *ap = ata_shost_to_port(sdev->host);
        struct ata_device *dev = ata_scsi_find_dev(ap, sdev);
        u16 __user *dst = arg;
        char buf[40];
@@ -645,7 +646,8 @@ int ata_task_ioctl(struct scsi_device *scsidev, void __user *arg)
        return rc;
 }
 
-int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
+int ata_sas_scsi_ioctl(struct ata_port *ap, struct scsi_device *scsidev,
+                    int cmd, void __user *arg)
 {
        int val = -EINVAL, rc = -EINVAL;
 
@@ -663,7 +665,7 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
                return 0;
 
        case HDIO_GET_IDENTITY:
-               return ata_get_identity(scsidev, arg);
+               return ata_get_identity(ap, scsidev, arg);
 
        case HDIO_DRIVE_CMD:
                if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO))
@@ -682,6 +684,14 @@ int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
 
        return rc;
 }
+EXPORT_SYMBOL_GPL(ata_sas_scsi_ioctl);
+
+int ata_scsi_ioctl(struct scsi_device *scsidev, int cmd, void __user *arg)
+{
+       return ata_sas_scsi_ioctl(ata_shost_to_port(scsidev->host),
+                               scsidev, cmd, arg);
+}
+EXPORT_SYMBOL_GPL(ata_scsi_ioctl);
 
 /**
  *     ata_scsi_qc_new - acquire new ata_queued_cmd reference
@@ -1294,6 +1304,17 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
 
                tf->command = ATA_CMD_VERIFY;   /* READ VERIFY */
        } else {
+               /* Some odd clown BIOSen issue spindown on power off (ACPI S4
+                * or S5) causing some drives to spin up and down again.
+                */
+               if ((qc->ap->flags & ATA_FLAG_NO_POWEROFF_SPINDOWN) &&
+                   system_state == SYSTEM_POWER_OFF)
+                       goto skip;
+
+               if ((qc->ap->flags & ATA_FLAG_NO_HIBERNATE_SPINDOWN) &&
+                    system_entering_hibernation())
+                       goto skip;
+
                /* XXX: This is for backward compatibility, will be
                 * removed.  Read Documentation/feature-removal-schedule.txt
                 * for more info.
@@ -1317,8 +1338,7 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
                                scmd->scsi_done = qc->scsidone;
                                qc->scsidone = ata_delayed_done;
                        }
-                       scmd->result = SAM_STAT_GOOD;
-                       return 1;
+                       goto skip;
                }
 
                /* Issue ATA STANDBY IMMEDIATE command */
@@ -1334,10 +1354,13 @@ static unsigned int ata_scsi_start_stop_xlat(struct ata_queued_cmd *qc)
 
        return 0;
 
-invalid_fld:
+ invalid_fld:
        ata_scsi_set_sense(scmd, ILLEGAL_REQUEST, 0x24, 0x0);
        /* "Invalid field in cbd" */
        return 1;
+ skip:
+       scmd->result = SAM_STAT_GOOD;
+       return 1;
 }
 
 
@@ -3369,7 +3392,7 @@ static void ata_scsi_remove_dev(struct ata_device *dev)
 
        if (sdev) {
                ata_dev_printk(dev, KERN_INFO, "detaching (SCSI %s)\n",
-                              sdev->sdev_gendev.bus_id);
+                              dev_name(&sdev->sdev_gendev));
 
                scsi_remove_device(sdev);
                scsi_device_put(sdev);