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megaraid_sas: Make tape drives visible on PERC5 controllers 

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@avagotech.com>
Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Sumit Saxena 2015-11-05 21:17:37 +05:30 committed by Martin K. Petersen
parent f3951a3709
commit aed335eecf
2 changed files with 18 additions and 3 deletions
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1
drivers/scsi/megaraid/megaraid_sas.h
View File

@ -1790,6 +1790,7 @@ struct megasas_instance {
u8 UnevenSpanSupport;
u8 supportmax256vd;
u8 allow_fw_scan;
u16 fw_supported_vd_count;
u16 fw_supported_pd_count;

20
drivers/scsi/megaraid/megaraid_sas_base.c
View File

@ -1760,6 +1760,20 @@ static void megasas_set_dma_alignment(struct scsi_device *sdev)
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;
}
}
megasas_set_dma_alignment(sdev);
/*
* The RAID firmware may require extended timeouts.
@ -1783,9 +1797,8 @@ 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;
@ -4699,6 +4712,7 @@ 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;
}