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Commit 453b07ac authored by Tejun Heo's avatar Tejun Heo
Browse files

[PATCH] libata-hp-prep: add ata_aux_wq 



It's best to run ATA hotplug from EH but attaching SCSI devices needs
working EH.  ata_aux_wq is used to give SCSI hotplug operations a
separate context.

Signed-off-by: default avatarTejun Heo <htejun@gmail.com>
parent 3edebac4

drivers/scsi/libata-core.c

+9 −0
Original line number Diff line number Diff line
@@ -69,6 +69,8 @@ static void ata_dev_xfermask(struct ata_device *dev); 
static unsigned int ata_unique_id = 1;

static struct workqueue_struct *ata_wq;



struct workqueue_struct *ata_aux_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)");
@@ -5623,6 +5625,12 @@ static int __init ata_init(void) 
	if (!ata_wq)

		return -ENOMEM;



	ata_aux_wq = create_singlethread_workqueue("ata_aux");

	if (!ata_aux_wq) {

		destroy_workqueue(ata_wq);

		return -ENOMEM;

	}



	printk(KERN_DEBUG "libata version " DRV_VERSION " loaded.\n");

	return 0;

}
@@ -5630,6 +5638,7 @@ static int __init ata_init(void) 
static void __exit ata_exit(void)

{

	destroy_workqueue(ata_wq);

	destroy_workqueue(ata_aux_wq);

}



module_init(ata_init);

drivers/scsi/libata.h

+1 −0
Original line number Diff line number Diff line
@@ -39,6 +39,7 @@ struct ata_scsi_args { 
};



/* libata-core.c */

extern struct workqueue_struct *ata_aux_wq;

extern int atapi_enabled;

extern int atapi_dmadir;

extern int libata_fua;