[SCSI] mpt fusion: Added support for MPT discovery completion check
sas_discovery_quiesce_io flag is used to control IO start/resume functionality.
IO will be stoped while doing discovery of topology. Once discovery is completed
It will resume IO. Resending patch including James review.
Signed-off-by: Kashyap Desai <kadesai@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index b162f7a..40dbaaa 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -1008,6 +1008,8 @@
static int
mptsas_qcmd(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
{
+ MPT_SCSI_HOST *hd;
+ MPT_ADAPTER *ioc;
VirtDevice *vdevice = SCpnt->device->hostdata;
if (!vdevice || !vdevice->vtarget || vdevice->vtarget->deleted) {
@@ -1016,6 +1018,12 @@
return 0;
}
+ hd = shost_priv(SCpnt->device->host);
+ ioc = hd->ioc;
+
+ if (ioc->sas_discovery_quiesce_io)
+ return SCSI_MLQUEUE_HOST_BUSY;
+
// scsi_print_command(SCpnt);
return mptscsih_qcmd(SCpnt,done);
@@ -3009,6 +3017,7 @@
EVENT_DATA_SAS_DISCOVERY *discovery_data)
{
struct mptsas_discovery_event *ev;
+ u32 discovery_status;
/*
* DiscoveryStatus
@@ -3017,7 +3026,9 @@
* kicks off discovery, and return to zero
* once its completed.
*/
- if (discovery_data->DiscoveryStatus)
+ discovery_status = le32_to_cpu(discovery_data->DiscoveryStatus);
+ ioc->sas_discovery_quiesce_io = discovery_status ? 1 : 0;
+ if (discovery_status)
return;
ev = kzalloc(sizeof(*ev), GFP_ATOMIC);
@@ -3299,12 +3310,22 @@
return error;
}
+void
+mptsas_shutdown(struct pci_dev *pdev)
+{
+ MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
+
+ ioc->sas_discovery_quiesce_io = 0;
+}
+
static void __devexit mptsas_remove(struct pci_dev *pdev)
{
MPT_ADAPTER *ioc = pci_get_drvdata(pdev);
struct mptsas_portinfo *p, *n;
int i;
+ mptsas_shutdown(pdev);
+
ioc->sas_discovery_ignore_events = 1;
sas_remove_host(ioc->sh);
@@ -3342,7 +3363,7 @@
.id_table = mptsas_pci_table,
.probe = mptsas_probe,
.remove = __devexit_p(mptsas_remove),
- .shutdown = mptscsih_shutdown,
+ .shutdown = mptsas_shutdown,
#ifdef CONFIG_PM
.suspend = mptscsih_suspend,
.resume = mptscsih_resume,