It's best to run ATA hotplug from EH but attaching SCSI devices needs
working EH. ata_hotplug_wq is used to give SCSI hotplug operations a
separate context.
---
drivers/scsi/libata-core.c | 9 +++++++++
drivers/scsi/libata.h | 1 +
2 files changed, 10 insertions(+), 0 deletions(-)
60b0f9061e9ce6345e549a38d73f4759daae0339
diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 6da1005..1f587aa 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -69,6 +69,8 @@ static void ata_dev_xfermask(struct ata_
static unsigned int ata_unique_id = 1;
static struct workqueue_struct *ata_wq;
+struct workqueue_struct *ata_hotplug_wq;
+
int atapi_enabled = 1;
module_param(atapi_enabled, int, 0444);
MODULE_PARM_DESC(atapi_enabled, "Enable discovery of ATAPI devices (0=off, 1=on)");
@@ -5588,6 +5590,12 @@ static int __init ata_init(void)
if (!ata_wq)
return -ENOMEM;
+ ata_hotplug_wq = create_singlethread_workqueue("ata_hotplug");
+ if (!ata_hotplug_wq) {
+ destroy_workqueue(ata_wq);
+ return -ENOMEM;
+ }
+
printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");
return 0;
}
@@ -5595,6 +5603,7 @@ static int __init ata_init(void)
static void __exit ata_exit(void)
{
destroy_workqueue(ata_wq);
+ destroy_workqueue(ata_hotplug_wq);
}
module_init(ata_init);
diff --git a/drivers/scsi/libata.h b/drivers/scsi/libata.h
index 134cb4d..ff50442 100644
--- a/drivers/scsi/libata.h
+++ b/drivers/scsi/libata.h
@@ -39,6 +39,7 @@ struct ata_scsi_args {
};
/* libata-core.c */
+extern struct workqueue_struct *ata_hotplug_wq;
extern int atapi_enabled;
extern int atapi_dmadir;
extern int libata_fua;
--
1.2.4
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