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authorJames Bottomley <James.Bottomley@steeleye.com>2006-02-14 10:48:46 -0600
committer <jejb@mulgrave.il.steeleye.com>2006-02-14 11:15:11 -0600
commit65110b2168950a19cc78b5027ed18cb811fbdae8 (patch)
tree8cdf4fc26b707e0e6ba988fd56da118d3206dceb /drivers/scsi
parentfaead26d7a06605add627f29aee73ba654ce11f9 (diff)
[SCSI] fix wrong context bugs in SCSI
There's a bug in releasing scsi_device where the release function actually frees the block queue. However, the block queue release calls flush_work(), which requires process context (the scsi_device structure may release from irq context). Update the release function to invoke via the execute_in_process_context() API. Also clean up the scsi_target structure releasing via this API. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r--drivers/scsi/scsi_scan.c26
-rw-r--r--drivers/scsi/scsi_sysfs.c9
2 files changed, 12 insertions, 23 deletions
diff --git a/drivers/scsi/scsi_scan.c b/drivers/scsi/scsi_scan.c
index 752fb5da3de..5acb83ca5ae 100644
--- a/drivers/scsi/scsi_scan.c
+++ b/drivers/scsi/scsi_scan.c
@@ -387,19 +387,12 @@ static struct scsi_target *scsi_alloc_target(struct device *parent,
return found_target;
}
-struct work_queue_wrapper {
- struct work_struct work;
- struct scsi_target *starget;
-};
-
-static void scsi_target_reap_work(void *data) {
- struct work_queue_wrapper *wqw = (struct work_queue_wrapper *)data;
- struct scsi_target *starget = wqw->starget;
+static void scsi_target_reap_usercontext(void *data)
+{
+ struct scsi_target *starget = data;
struct Scsi_Host *shost = dev_to_shost(starget->dev.parent);
unsigned long flags;
- kfree(wqw);
-
spin_lock_irqsave(shost->host_lock, flags);
if (--starget->reap_ref == 0 && list_empty(&starget->devices)) {
@@ -428,18 +421,7 @@ static void scsi_target_reap_work(void *data) {
*/
void scsi_target_reap(struct scsi_target *starget)
{
- struct work_queue_wrapper *wqw =
- kzalloc(sizeof(struct work_queue_wrapper), GFP_ATOMIC);
-
- if (!wqw) {
- starget_printk(KERN_ERR, starget,
- "Failed to allocate memory in scsi_reap_target()\n");
- return;
- }
-
- INIT_WORK(&wqw->work, scsi_target_reap_work, wqw);
- wqw->starget = starget;
- schedule_work(&wqw->work);
+ scsi_execute_in_process_context(scsi_target_reap_usercontext, starget);
}
/**
diff --git a/drivers/scsi/scsi_sysfs.c b/drivers/scsi/scsi_sysfs.c
index a77b32deaf8..902a5def8e6 100644
--- a/drivers/scsi/scsi_sysfs.c
+++ b/drivers/scsi/scsi_sysfs.c
@@ -217,8 +217,9 @@ static void scsi_device_cls_release(struct class_device *class_dev)
put_device(&sdev->sdev_gendev);
}
-static void scsi_device_dev_release(struct device *dev)
+static void scsi_device_dev_release_usercontext(void *data)
{
+ struct device *dev = data;
struct scsi_device *sdev;
struct device *parent;
struct scsi_target *starget;
@@ -237,6 +238,7 @@ static void scsi_device_dev_release(struct device *dev)
if (sdev->request_queue) {
sdev->request_queue->queuedata = NULL;
+ /* user context needed to free queue */
scsi_free_queue(sdev->request_queue);
/* temporary expedient, try to catch use of queue lock
* after free of sdev */
@@ -252,6 +254,11 @@ static void scsi_device_dev_release(struct device *dev)
put_device(parent);
}
+static void scsi_device_dev_release(struct device *dev)
+{
+ scsi_execute_in_process_context(scsi_device_dev_release_usercontext, dev);
+}
+
static struct class sdev_class = {
.name = "scsi_device",
.release = scsi_device_cls_release,