Merge branch 'for-2.6.36' of git://git.kernel.dk/linux-2.6-block

[firefly-linux-kernel-4.4.55.git] / drivers / ata / libata-scsi.c

diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 0a8cd34847915295d04867d1fd576517c91e8646..a89172c100f5645c3317dbe6b87c4cd797a4649c 100644 (file)
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -3435,7 +3435,7 @@ void ata_scsi_scan_host(struct ata_port *ap, int sync)
                                "                  switching to async\n");
        }
 
-       queue_delayed_work(ata_aux_wq, &ap->hotplug_task,
+       queue_delayed_work(system_long_wq, &ap->hotplug_task,
                           round_jiffies_relative(HZ));
 }
 
@@ -3582,6 +3582,7 @@ void ata_scsi_hotplug(struct work_struct *work)
        }
 
        DPRINTK("ENTER\n");
+       mutex_lock(&ap->scsi_scan_mutex);
 
        /* Unplug detached devices.  We cannot use link iterator here
         * because PMP links have to be scanned even if PMP is
@@ -3595,6 +3596,7 @@ void ata_scsi_hotplug(struct work_struct *work)
        /* scan for new ones */
        ata_scsi_scan_host(ap, 0);
 
+       mutex_unlock(&ap->scsi_scan_mutex);
        DPRINTK("EXIT\n");
 }
 
@@ -3673,9 +3675,7 @@ static int ata_scsi_user_scan(struct Scsi_Host *shost, unsigned int channel,
  *     @work: Pointer to ATA port to perform scsi_rescan_device()
  *
  *     After ATA pass thru (SAT) commands are executed successfully,
- *     libata need to propagate the changes to SCSI layer.  This
- *     function must be executed from ata_aux_wq such that sdev
- *     attach/detach don't race with rescan.
+ *     libata need to propagate the changes to SCSI layer.
  *
  *     LOCKING:
  *     Kernel thread context (may sleep).
@@ -3688,6 +3688,7 @@ void ata_scsi_dev_rescan(struct work_struct *work)
        struct ata_device *dev;
        unsigned long flags;
 
+       mutex_lock(&ap->scsi_scan_mutex);
        spin_lock_irqsave(ap->lock, flags);
 
        ata_for_each_link(link, ap, EDGE) {
@@ -3707,6 +3708,7 @@ void ata_scsi_dev_rescan(struct work_struct *work)
        }
 
        spin_unlock_irqrestore(ap->lock, flags);
+       mutex_unlock(&ap->scsi_scan_mutex);
 }
 
 /**