From ec5e69f6d3f4350681d6f7eaae515cf014be9276 Mon Sep 17 00:00:00 2001 From: James Bottomley Date: Mon, 23 Jun 2008 14:52:09 -0500 Subject: [PATCH] [SCSI] esp: tidy up target reference counting The esp driver currently does hand rolled reference counting of its target. It's much easier to do what it needs to do if it's plugged into the mid-layer callbacks (target_alloc and target_destroy) which were designed for this case, so do it this way and get rid of the internal target reference count. Acked-by: David S. Miller Cc: Stable Tree Signed-off-by: James Bottomley --- drivers/scsi/esp_scsi.c | 30 ++++++++++++++++++++---------- drivers/scsi/esp_scsi.h | 1 - 2 files changed, 20 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/esp_scsi.c b/drivers/scsi/esp_scsi.c index 305eddef5ca1..59fbef08d690 100644 --- a/drivers/scsi/esp_scsi.c +++ b/drivers/scsi/esp_scsi.c @@ -2359,6 +2359,24 @@ void scsi_esp_unregister(struct esp *esp) } EXPORT_SYMBOL(scsi_esp_unregister); +static int esp_target_alloc(struct scsi_target *starget) +{ + struct esp *esp = shost_priv(dev_to_shost(&starget->dev)); + struct esp_target_data *tp = &esp->target[starget->id]; + + tp->starget = starget; + + return 0; +} + +static void esp_target_destroy(struct scsi_target *starget) +{ + struct esp *esp = shost_priv(dev_to_shost(&starget->dev)); + struct esp_target_data *tp = &esp->target[starget->id]; + + tp->starget = NULL; +} + static int esp_slave_alloc(struct scsi_device *dev) { struct esp *esp = shost_priv(dev->host); @@ -2370,9 +2388,6 @@ static int esp_slave_alloc(struct scsi_device *dev) return -ENOMEM; dev->hostdata = lp; - tp->starget = dev->sdev_target; - tp->starget_ref++; - spi_min_period(tp->starget) = esp->min_period; spi_max_offset(tp->starget) = 15; @@ -2426,17 +2441,10 @@ static int esp_slave_configure(struct scsi_device *dev) static void esp_slave_destroy(struct scsi_device *dev) { - struct esp *esp = shost_priv(dev->host); - struct esp_target_data *tp = &esp->target[dev->id]; struct esp_lun_data *lp = dev->hostdata; kfree(lp); dev->hostdata = NULL; - - BUG_ON(tp->starget_ref <= 0); - - if (!--tp->starget_ref) - tp->starget = NULL; } static int esp_eh_abort_handler(struct scsi_cmnd *cmd) @@ -2616,6 +2624,8 @@ struct scsi_host_template scsi_esp_template = { .name = "esp", .info = esp_info, .queuecommand = esp_queuecommand, + .target_alloc = esp_target_alloc, + .target_destroy = esp_target_destroy, .slave_alloc = esp_slave_alloc, .slave_configure = esp_slave_configure, .slave_destroy = esp_slave_destroy, diff --git a/drivers/scsi/esp_scsi.h b/drivers/scsi/esp_scsi.h index 655e0b2240bf..bb43a1388188 100644 --- a/drivers/scsi/esp_scsi.h +++ b/drivers/scsi/esp_scsi.h @@ -322,7 +322,6 @@ struct esp_target_data { u8 nego_goal_tags; struct scsi_target *starget; - int starget_ref; }; struct esp_event_ent {