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

[Hannes Reinecke <hare@suse.de>]

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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@suse.de>
>> ---
>>  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@suse.de			      +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: Markus Rex, HRB 16746 (AG Nürnberg)

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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@suse.de>

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)
 {