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Diffstat (limited to 'drivers/scsi/scsi.c')
-rw-r--r--drivers/scsi/scsi.c31
1 files changed, 29 insertions, 2 deletions
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 192948822455..0fb1709ce5e3 100644
--- 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);
@@ -915,6 +915,33 @@ 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
* @lun: SCSI Logical Unit Number