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path: root/drivers/scsi/scsi_sysfs.c
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Diffstat (limited to 'drivers/scsi/scsi_sysfs.c')
-rw-r--r--drivers/scsi/scsi_sysfs.c30
1 files changed, 13 insertions, 17 deletions
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index 9dad2fd5297f..5d61f58399dc 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -443,15 +443,18 @@ static void scsi_device_cls_release(struct device *class_dev)
static void scsi_device_dev_release_usercontext(struct work_struct *work)
{
- struct scsi_device *sdev = container_of(work, struct scsi_device,
- ew.work);
- struct scsi_target *starget = sdev->sdev_target;
+ struct scsi_device *sdev;
struct device *parent;
struct list_head *this, *tmp;
struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL;
struct scsi_vpd *vpd_pg0 = NULL, *vpd_pg89 = NULL;
struct scsi_vpd *vpd_pgb0 = NULL, *vpd_pgb1 = NULL, *vpd_pgb2 = NULL;
unsigned long flags;
+ struct module *mod;
+
+ sdev = container_of(work, struct scsi_device, ew.work);
+
+ mod = sdev->host->hostt->module;
scsi_dh_release_device(sdev);
@@ -513,16 +516,19 @@ static void scsi_device_dev_release_usercontext(struct work_struct *work)
kfree(sdev->inquiry);
kfree(sdev);
- if (starget && atomic_dec_return(&starget->sdev_count) == 0)
- wake_up(&starget->sdev_wq);
-
if (parent)
put_device(parent);
+ module_put(mod);
}
static void scsi_device_dev_release(struct device *dev)
{
struct scsi_device *sdp = to_scsi_device(dev);
+
+ /* Set module pointer as NULL in case of module unloading */
+ if (!try_module_get(sdp->host->hostt->module))
+ sdp->host->hostt->module = NULL;
+
execute_in_process_context(scsi_device_dev_release_usercontext,
&sdp->ew);
}
@@ -1470,6 +1476,7 @@ void __scsi_remove_device(struct scsi_device *sdev)
mutex_unlock(&sdev->state_mutex);
blk_mq_destroy_queue(sdev->request_queue);
+ kref_put(&sdev->host->tagset_refcnt, scsi_mq_free_tags);
cancel_work_sync(&sdev->requeue_work);
if (sdev->host->hostt->slave_destroy)
@@ -1529,14 +1536,6 @@ static void __scsi_remove_target(struct scsi_target *starget)
goto restart;
}
spin_unlock_irqrestore(shost->host_lock, flags);
-
- /*
- * After scsi_remove_target() returns its caller can remove resources
- * associated with @starget, e.g. an rport or session. Wait until all
- * devices associated with @starget have been removed to prevent that
- * a SCSI error handling callback function triggers a use-after-free.
- */
- wait_event(starget->sdev_wq, atomic_read(&starget->sdev_count) == 0);
}
/**
@@ -1647,9 +1646,6 @@ void scsi_sysfs_device_initialize(struct scsi_device *sdev)
list_add_tail(&sdev->same_target_siblings, &starget->devices);
list_add_tail(&sdev->siblings, &shost->__devices);
spin_unlock_irqrestore(shost->host_lock, flags);
-
- atomic_inc(&starget->sdev_count);
-
/*
* device can now only be removed via __scsi_remove_device() so hold
* the target. Target will be held in CREATED state until something