On 07/01/2013 02:05 PM, Bart Van Assche wrote:
> On 07/01/13 10:27, Hannes Reinecke wrote:
>> On 06/27/2013 04:57 PM, Bart Van Assche wrote:
>>> diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
>>> index dfbaa34..666b741 100644
>>> --- a/drivers/scsi/scsi_sysfs.c
>>> +++ b/drivers/scsi/scsi_sysfs.c
>>> @@ -959,14 +959,16 @@ void __scsi_remove_device(struct scsi_device *sdev)
>>> {
>>> struct Scsi_Host *shost = sdev->host;
>>> struct device *dev = &sdev->sdev_gendev;
>>> + enum scsi_device_state sdev_state;
>>> int res;
>>>
>>> if (sdev->is_visible) {
>>> spin_lock_irq(shost->host_lock);
>>> + sdev_state = sdev->sdev_state;
>>> res = scsi_device_set_state(sdev, SDEV_CANCEL);
>>> spin_unlock_irq(shost->host_lock);
>>>
>>> - if (res != 0)
>>> + if (res != 0 && sdev_state != SDEV_TRANSPORT_OFFLINE)
>>> return;
>>>
>>> bsg_unregister_queue(sdev->request_queue);
>>>
>> Hmm. This is really subtle. Do you mind adding inserting a comment
>> here on why this is required?
>
> How about inserting the following comment just above the last if-statement
> in the code cited above ?
>
> /*
> * The transition from SDEV_TRANSPORT_OFFLINE into SDEV_CANCEL
> * is not allowed since this transition would re-enable I/O. If
> * the device state was already SDEV_TRANSPORT_OFFLINE,
> * proceed with device removal.
> */
>
> Bart.
>
Perfect.
Cheers,
Hannes
--
Dr. Hannes Reinecke zSeries & Storage
[email protected] +49 911 74053 688
SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg
GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg)
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