AcoSail/kernel_optimize_test
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[SCSI] Skip deleted devices in __scsi_device_lookup_by_target()

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__scsi_device_lookup_by_target() will always return
the first sdev with a matching LUN, regardless of
the state. However, when this sdev is in SDEV_DEL
scsi_device_lookup_by_target() will ignore this
device and so any valid device on the list after
the deleted device will never be found.
So we have to modify __scsi_device_lookup_by_target()
to skip any device in SDEV_DEL.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
This commit is contained in:
Hannes Reinecke 2009-01-13 16:50:37 +01:00 committed by James Bottomley
parent debf47779e
commit 32aeef605a
1 changed files with 4 additions and 1 deletions
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5
drivers/scsi/scsi.c
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@ -1095,7 +1095,8 @@ EXPORT_SYMBOL(__starget_for_each_device);
* Description: Looks up the scsi_device with the specified @lun for a given
* @starget. The returned scsi_device does not have an additional
* reference. You must hold the host's host_lock over this call and
* any access to the returned scsi_device.
* any access to the returned scsi_device. A scsi_device in state
* SDEV_DEL is skipped.
*
* Note: The only reason why drivers should use this is because
* they need to access the device list in irq context. Otherwise you
@ -1107,6 +1108,8 @@ struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *starget,
struct scsi_device *sdev;
list_for_each_entry(sdev, &starget->devices, same_target_siblings) {
if (sdev->sdev_state == SDEV_DEL)
continue;
if (sdev->lun ==lun)
return sdev;
}