4.2.8-ckt1 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Sumit Saxena <sumit.saxena@xxxxxxxxxxxxx>
commit aed335eecf8f09c28588b01c7f7e24ee78156e28 upstream.
The DELL PERC5 controller firmware does not list tape drives in response
to MR_DCMD_PD_LIST_QUERY. This causes tape drives not be exposed to the
OS when connected to a PERC5 controller.
This patch permits detection of tape drives connected to a PERC5
controller by exposing non-TYPE_DISK devices unconditionally.
Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxxx>
Signed-off-by: Sumit Saxena <sumit.saxena@xxxxxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Kamal Mostafa <kamal@xxxxxxxxxxxxx>
---
drivers/scsi/megaraid/megaraid_sas.h | 1 +
drivers/scsi/megaraid/megaraid_sas_base.c | 20 +++++++++++++++++---
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
index ebf821b..5194068 100644
--- a/drivers/scsi/megaraid/megaraid_sas.h
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -1750,6 +1750,7 @@ struct megasas_instance {
u8 UnevenSpanSupport;
u8 supportmax256vd;
+ u8 allow_fw_scan;
u16 fw_supported_vd_count;
u16 fw_supported_pd_count;
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 2ec768b..ffe1096 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -1650,6 +1650,20 @@ static struct megasas_instance *megasas_lookup_instance(u16 host_no)
static int megasas_slave_configure(struct scsi_device *sdev)
{
+ u16 pd_index = 0;
+ struct megasas_instance *instance;
+
+ instance = megasas_lookup_instance(sdev->host->host_no);
+ if (instance->allow_fw_scan) {
+ if (sdev->channel < MEGASAS_MAX_PD_CHANNELS &&
+ sdev->type == TYPE_DISK) {
+ pd_index = (sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
+ sdev->id;
+ if (instance->pd_list[pd_index].driveState !=
+ MR_PD_STATE_SYSTEM)
+ return -ENXIO;
+ }
+ }
/*
* The RAID firmware may require extended timeouts.
*/
@@ -1671,9 +1685,8 @@ static int megasas_slave_alloc(struct scsi_device *sdev)
pd_index =
(sdev->channel * MEGASAS_MAX_DEV_PER_CHANNEL) +
sdev->id;
- if ((instance->pd_list[pd_index].driveState ==
- MR_PD_STATE_SYSTEM) ||
- (instance->pd_list[pd_index].driveType != TYPE_DISK)) {
+ if ((instance->allow_fw_scan || instance->pd_list[pd_index].driveState ==
+ MR_PD_STATE_SYSTEM)) {
return 0;
}
return -ENXIO;
@@ -4543,6 +4556,7 @@ static int megasas_init_fw(struct megasas_instance *instance)
case PCI_DEVICE_ID_DELL_PERC5:
default:
instance->instancet = &megasas_instance_template_xscale;
+ instance->allow_fw_scan = 1;
break;
}
--
1.9.1
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