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[SCSI] mpt2sas: move even handling of MPT2SAS_TURN_ON_FAULT_LED into process context 

Driver was a sending a SEP request during interrupt context which
required to go to sleep.

The fix is to rearrange the code so a fake event
MPT2SAS_TURN_ON_FAULT_LED is fired from interrupt context, then later
during the kernel worker threads processing, the SEP request is issued
to firmware.

Cc: stable@kernel.org
Signed-off-by: Kashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
This commit is contained in:
Kashyap, Desai 2011-05-04 16:35:58 +05:30 committed by James Bottomley
parent d762f43831
commit 3ace8e052b
1 changed files with 69 additions and 27 deletions
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96
drivers/scsi/mpt2sas/mpt2sas_scsih.c
View File

@ -113,6 +113,7 @@ struct sense_info {
};
#define MPT2SAS_TURN_ON_FAULT_LED (0xFFFC)
#define MPT2SAS_RESCAN_AFTER_HOST_RESET (0xFFFF)
/**
@ -121,6 +122,7 @@ struct sense_info {
* @work: work object (ioc->fault_reset_work_q)
* @cancel_pending_work: flag set during reset handling
* @ioc: per adapter object
* @device_handle: device handle
* @VF_ID: virtual function id
* @VP_ID: virtual port id
* @ignore: flag meaning this event has been marked to ignore
@ -134,6 +136,7 @@ struct fw_event_work {
u8 cancel_pending_work;
struct delayed_work delayed_work;
struct MPT2SAS_ADAPTER *ioc;
u16 device_handle;
u8 VF_ID;
u8 VP_ID;
u8 ignore;
@ -4047,17 +4050,75 @@ _scsih_scsi_ioc_info(struct MPT2SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
#endif
/**
* _scsih_smart_predicted_fault - illuminate Fault LED
* _scsih_turn_on_fault_led - illuminate Fault LED
* @ioc: per adapter object
* @handle: device handle
* Context: process
*
* Return nothing.
*/
static void
_scsih_turn_on_fault_led(struct MPT2SAS_ADAPTER *ioc, u16 handle)
{
Mpi2SepReply_t mpi_reply;
Mpi2SepRequest_t mpi_request;
memset(&mpi_request, 0, sizeof(Mpi2SepRequest_t));
mpi_request.Function = MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR;
mpi_request.Action = MPI2_SEP_REQ_ACTION_WRITE_STATUS;
mpi_request.SlotStatus =
cpu_to_le32(MPI2_SEP_REQ_SLOTSTATUS_PREDICTED_FAULT);
mpi_request.DevHandle = cpu_to_le16(handle);
mpi_request.Flags = MPI2_SEP_REQ_FLAGS_DEVHANDLE_ADDRESS;
if ((mpt2sas_base_scsi_enclosure_processor(ioc, &mpi_reply,
&mpi_request)) != 0) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n", ioc->name,
__FILE__, __LINE__, __func__);
return;
}
if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT "enclosure_processor: "
"ioc_status (0x%04x), loginfo(0x%08x)\n", ioc->name,
le16_to_cpu(mpi_reply.IOCStatus),
le32_to_cpu(mpi_reply.IOCLogInfo)));
return;
}
}
/**
* _scsih_send_event_to_turn_on_fault_led - fire delayed event
* @ioc: per adapter object
* @handle: device handle
* Context: interrupt.
*
* Return nothing.
*/
static void
_scsih_send_event_to_turn_on_fault_led(struct MPT2SAS_ADAPTER *ioc, u16 handle)
{
struct fw_event_work *fw_event;
fw_event = kzalloc(sizeof(struct fw_event_work), GFP_ATOMIC);
if (!fw_event)
return;
fw_event->event = MPT2SAS_TURN_ON_FAULT_LED;
fw_event->device_handle = handle;
fw_event->ioc = ioc;
_scsih_fw_event_add(ioc, fw_event);
}
/**
* _scsih_smart_predicted_fault - process smart errors
* @ioc: per adapter object
* @handle: device handle
* Context: interrupt.
*
* Return nothing.
*/
static void
_scsih_smart_predicted_fault(struct MPT2SAS_ADAPTER *ioc, u16 handle)
{
Mpi2SepReply_t mpi_reply;
Mpi2SepRequest_t mpi_request;
struct scsi_target *starget;
struct MPT2SAS_TARGET *sas_target_priv_data;
Mpi2EventNotificationReply_t *event_reply;
@ -4084,30 +4145,8 @@ _scsih_smart_predicted_fault(struct MPT2SAS_ADAPTER *ioc, u16 handle)
starget_printk(KERN_WARNING, starget, "predicted fault\n");
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
if (ioc->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM) {
memset(&mpi_request, 0, sizeof(Mpi2SepRequest_t));
mpi_request.Function = MPI2_FUNCTION_SCSI_ENCLOSURE_PROCESSOR;
mpi_request.Action = MPI2_SEP_REQ_ACTION_WRITE_STATUS;
mpi_request.SlotStatus =
cpu_to_le32(MPI2_SEP_REQ_SLOTSTATUS_PREDICTED_FAULT);
mpi_request.DevHandle = cpu_to_le16(handle);
mpi_request.Flags = MPI2_SEP_REQ_FLAGS_DEVHANDLE_ADDRESS;
if ((mpt2sas_base_scsi_enclosure_processor(ioc, &mpi_reply,
&mpi_request)) != 0) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
return;
}
if (mpi_reply.IOCStatus || mpi_reply.IOCLogInfo) {
dewtprintk(ioc, printk(MPT2SAS_INFO_FMT
"enclosure_processor: ioc_status (0x%04x), "
"loginfo(0x%08x)\n", ioc->name,
le16_to_cpu(mpi_reply.IOCStatus),
le32_to_cpu(mpi_reply.IOCLogInfo)));
return;
}
}
if (ioc->pdev->subsystem_vendor == PCI_VENDOR_ID_IBM)
_scsih_send_event_to_turn_on_fault_led(ioc, handle);
/* insert into event log */
sz = offsetof(Mpi2EventNotificationReply_t, EventData) +
@ -6753,6 +6792,9 @@ _firmware_event_work(struct work_struct *work)
}
switch (fw_event->event) {
case MPT2SAS_TURN_ON_FAULT_LED:
_scsih_turn_on_fault_led(ioc, fw_event->device_handle);
break;
case MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST:
_scsih_sas_topology_change_event(ioc, fw_event);
break;