Revert "scsi: revert "[SCSI] Get rid of scsi_cmnd->done""

[pandora-kernel.git] / drivers / scsi / scsi.c

diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 1929488..0fb1709 100644 (file)
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -896,11 +896,11 @@ EXPORT_SYMBOL(__scsi_iterate_devices);
  * starget_for_each_device  -  helper to walk all devices of a target
  * @starget:   target whose devices we want to iterate over.
  *
- * This traverses over each devices of @shost.  The devices have
+ * This traverses over each device of @starget.  The devices have
  * a reference that must be released by scsi_host_put when breaking
  * out of the loop.
  */
-void starget_for_each_device(struct scsi_target *starget, void * data,
+void starget_for_each_device(struct scsi_target *starget, void *data,
                     void (*fn)(struct scsi_device *, void *))
 {
        struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
@@ -914,6 +914,33 @@ void starget_for_each_device(struct scsi_target *starget, void * data,
 }
 EXPORT_SYMBOL(starget_for_each_device);
 
+/**
+ * __starget_for_each_device  -  helper to walk all devices of a target
+ *                              (UNLOCKED)
+ * @starget:   target whose devices we want to iterate over.
+ *
+ * This traverses over each device of @starget.  It does _not_
+ * take a reference on the scsi_device, so the whole loop must be
+ * protected by shost->host_lock.
+ *
+ * Note:  The only reason why drivers would want to use this is because
+ * they need to access the device list in irq context.  Otherwise you
+ * really want to use starget_for_each_device instead.
+ **/
+void __starget_for_each_device(struct scsi_target *starget, void *data,
+                              void (*fn)(struct scsi_device *, void *))
+{
+       struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
+       struct scsi_device *sdev;
+
+       __shost_for_each_device(sdev, shost) {
+               if ((sdev->channel == starget->channel) &&
+                   (sdev->id == starget->id))
+                       fn(sdev, data);
+       }
+}
+EXPORT_SYMBOL(__starget_for_each_device);
+
 /**
  * __scsi_device_lookup_by_target - find a device given the target (UNLOCKED)
  * @starget:   SCSI target pointer