Re: [PATCH] Check for deleted device in scsi_device_online()

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Hi James,

James Bottomley wrote:
On Tue, 2008-12-16 at 16:33 +0100, Hannes Reinecke wrote:
scsi_device_online() is not just a negation of SDEV_OFFLINE,
also devices in state SDEV_CANCEL and SDEV_DEL are
actually offline.

Signed-off-by: Hannes Reinecke <hare@xxxxxxx>
---
 include/scsi/scsi_device.h |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index e96daf6..63b58d2 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -401,7 +401,9 @@ static inline unsigned int sdev_id(struct scsi_device *sdev)
  */
 static inline int scsi_device_online(struct scsi_device *sdev)
 {
-	return sdev->sdev_state != SDEV_OFFLINE;
+	return (sdev->sdev_state != SDEV_OFFLINE &&
+		sdev->sdev_state != SDEV_CANCEL &&
+		sdev->sdev_state != SDEV_DEL);

SDEV_DEL is OK.  We can't do this for SDEV_CANCEL because that will
block post removal commands (notably cache flush).

You are correct as usual. Updated patch attached.

Cheers,

Hannes
--
Dr. Hannes Reinecke		      zSeries & Storage
hare@xxxxxxx			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)
scsi_device_online() is not just a negation of SDEV_OFFLINE,
also devices in state SDEV_DEL are actually offline.

Signed-off-by: Hannes Reinecke <hare@xxxxxxx>

diff --git a/include/scsi/scsi_device.h b/include/scsi/scsi_device.h
index e96daf6..bb80937 100644
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -401,7 +401,8 @@ static inline unsigned int sdev_id(struct scsi_device *sdev)
  */
 static inline int scsi_device_online(struct scsi_device *sdev)
 {
-	return sdev->sdev_state != SDEV_OFFLINE;
+	return (sdev->sdev_state != SDEV_OFFLINE &&
+		sdev->sdev_state != SDEV_DEL);
 }
 static inline int scsi_device_blocked(struct scsi_device *sdev)
 {

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