diff options
Diffstat (limited to 'drivers/scsi/device_handler/scsi_dh_alua.c')
| -rw-r--r-- | drivers/scsi/device_handler/scsi_dh_alua.c | 26 |
1 files changed, 18 insertions, 8 deletions
diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index e034f12..752b5c9 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -195,10 +195,13 @@ static struct alua_port_group *alua_find_get_pg(char *id_str, size_t id_size, { struct alua_port_group *pg; + if (!id_str || !id_size || !strlen(id_str)) + return NULL; + list_for_each_entry(pg, &port_group_list, node) { if (pg->group_id != group_id) continue; - if (pg->device_id_len != id_size) + if (!pg->device_id_len || pg->device_id_len != id_size) continue; if (strncmp(pg->device_id_str, id_str, id_size)) continue; @@ -232,14 +235,14 @@ static struct alua_port_group *alua_alloc_pg(struct scsi_device *sdev, sizeof(pg->device_id_str)); if (pg->device_id_len <= 0) { /* - * Internal error: TPGS supported but no device - * identifcation found. Disable ALUA support. + * TPGS supported but no device identification found. + * Generate private device identification. */ - kfree(pg); sdev_printk(KERN_INFO, sdev, "%s: No device descriptors found\n", ALUA_DH_NAME); - return ERR_PTR(-ENXIO); + pg->device_id_str[0] = '\0'; + pg->device_id_len = 0; } pg->group_id = group_id; pg->tpgs = tpgs; @@ -354,9 +357,15 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h, return SCSI_DH_NOMEM; return SCSI_DH_DEV_UNSUPP; } - sdev_printk(KERN_INFO, sdev, - "%s: device %s port group %x rel port %x\n", - ALUA_DH_NAME, pg->device_id_str, group_id, rel_port); + if (pg->device_id_len) + sdev_printk(KERN_INFO, sdev, + "%s: device %s port group %x rel port %x\n", + ALUA_DH_NAME, pg->device_id_str, + group_id, rel_port); + else + sdev_printk(KERN_INFO, sdev, + "%s: port group %x rel port %x\n", + ALUA_DH_NAME, group_id, rel_port); /* Check for existing port group references */ spin_lock(&h->pg_lock); @@ -532,6 +541,7 @@ static int alua_rtpg(struct scsi_device *sdev, struct alua_port_group *pg) return SCSI_DH_DEV_TEMP_BUSY; retry: + err = 0; retval = submit_rtpg(sdev, buff, bufflen, &sense_hdr, pg->flags); if (retval) { |