From a4253fde53fda56c2116a1cf8df9c93ef272eab4 Mon Sep 17 00:00:00 2001 From: Hannes Reinecke Date: Fri, 19 Feb 2016 09:17:06 +0100 Subject: [PATCH] scsi_dh_alua: simplify alua_initialize() Rework alua_check_vpd() to use scsi_vpd_get_tpg() and move the port group selection into the function, too. With that we can simplify alua_initialize() to just call alua_check_tpgs() and alua_check_vpd(); Reviewed-by: Bart Van Assche Reviewed-by: Christoph Hellwig Signed-off-by: Hannes Reinecke Signed-off-by: Martin K. Petersen --- drivers/scsi/device_handler/scsi_dh_alua.c | 38 ++++++++++------------ 1 file changed, 17 insertions(+), 21 deletions(-) diff --git a/drivers/scsi/device_handler/scsi_dh_alua.c b/drivers/scsi/device_handler/scsi_dh_alua.c index 0bcd901a6435..a6fe3ae50c25 100644 --- a/drivers/scsi/device_handler/scsi_dh_alua.c +++ b/drivers/scsi/device_handler/scsi_dh_alua.c @@ -92,6 +92,7 @@ struct alua_dh_data { #define ALUA_POLICY_SWITCH_CURRENT 0 #define ALUA_POLICY_SWITCH_ALL 1 +static int alua_rtpg(struct scsi_device *, struct alua_port_group *, int); static char print_alua_state(int); static void release_port_group(struct kref *kref) @@ -294,7 +295,8 @@ static int alua_check_tpgs(struct scsi_device *sdev) * Extract the relative target port and the target port group * descriptor from the list of identificators. */ -static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h) +static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h, + int tpgs) { int rel_port = -1, group_id; @@ -310,13 +312,21 @@ static int alua_check_vpd(struct scsi_device *sdev, struct alua_dh_data *h) ALUA_DH_NAME); return SCSI_DH_DEV_UNSUPP; } - h->group_id = group_id; + + h->pg = alua_alloc_pg(sdev, group_id, tpgs); + if (IS_ERR(h->pg)) { + if (PTR_ERR(h->pg) == -ENOMEM) + return SCSI_DH_NOMEM; + return SCSI_DH_DEV_UNSUPP; + } + h->rel_port = rel_port; sdev_printk(KERN_INFO, sdev, - "%s: port group %x rel port %x\n", - ALUA_DH_NAME, h->group_id, h->rel_port); + "%s: device %s port group %x rel port %x\n", + ALUA_DH_NAME, h->pg->device_id_str, + h->group_id, h->rel_port); - return 0; + return alua_rtpg(sdev, h->pg, 0); } static char print_alua_state(int state) @@ -633,23 +643,9 @@ static int alua_initialize(struct scsi_device *sdev, struct alua_dh_data *h) int err = SCSI_DH_DEV_UNSUPP, tpgs; tpgs = alua_check_tpgs(sdev); - if (tpgs == TPGS_MODE_NONE) - goto out; - - err = alua_check_vpd(sdev, h); - if (err != SCSI_DH_OK) - goto out; + if (tpgs != TPGS_MODE_NONE) + err = alua_check_vpd(sdev, h, tpgs); - h->pg = alua_alloc_pg(sdev, h->group_id, tpgs); - if (IS_ERR(h->pg)) { - if (PTR_ERR(h->pg) == -ENOMEM) - err = SCSI_DH_NOMEM; - goto out; - } - kref_get(&h->pg->kref); - err = alua_rtpg(sdev, h->pg, 0); - kref_put(&h->pg->kref, release_port_group); -out: return err; } /* -- 2.20.1