Ok, coming back to this path as it's the start of somethign building
up over various patches:
> + pg = kzalloc(sizeof(struct alua_port_group), GFP_KERNEL);
> + if (!pg) {
> + sdev_printk(KERN_WARNING, sdev,
> + "%s: kzalloc port group failed\n",
> + ALUA_DH_NAME);
> + /* Temporary failure, bypass */
> + return SCSI_DH_DEV_TEMP_BUSY;
> + }
> + pg->group_id = group_id;
> + pg->buff = pg->inq;
> + pg->bufflen = ALUA_INQUIRY_SIZE;
> + pg->tpgs = h->tpgs;
> + pg->state = TPGS_STATE_OPTIMIZED;
> + kref_init(&pg->kref);
> + spin_lock(&port_group_lock);
> + list_add(&pg->node, &port_group_list);
> + h->pg = pg;
> + spin_unlock(&port_group_lock);
> +
> + return SCSI_DH_OK;
All this code isn't really checking the VPD anymore. Please keep
the existing alua_check_vpd as a low-level helper, and move this
new functionality into a separate alua_find_get_pg function that
calls the original alua_check_vpd. Also please return the
pg from it so that we c
> @@ -596,13 +643,12 @@ static int alua_initialize(struct scsi_device *sdev, struct alua_dh_data *h)
> goto out;
>
> err = alua_check_vpd(sdev, h);
> - if (err != SCSI_DH_OK)
> - goto out;
> -
> - err = alua_rtpg(sdev, h, 0);
> - if (err != SCSI_DH_OK)
> + if (err != SCSI_DH_OK || !h->pg)
> goto out;
How could we end up here without h->pg? Either way that should
move into a conditional together with the kref_get which should
become the not_zero variant if it is kept.
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