[PATCH v2 02/11] mpt2sas: combine fw_event_work and its event_data

Joe Lawrence
2014-06-25T21:08:13Z

Tack the firmware reply event_data payload to the end of its
corresponding struct fw_event_work allocation. This matches the
convention in the mptfusion driver and simplifies the code.

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
---
drivers/scsi/mpt2sas/mpt2sas_scsih.c | 52 ++++++++++++++++++++--------------
1 file changed, 30 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/mpt2sas/mpt2sas_scsih.c b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
index 13e49c3..e7801ff 100644
--- a/drivers/scsi/mpt2sas/mpt2sas_scsih.c
+++ b/drivers/scsi/mpt2sas/mpt2sas_scsih.c
@@ -173,7 +173,7 @@ struct fw_event_work {
u8 VP_ID;
u8 ignore;
u16 event;
- void *event_data;
+ char event_data[0] __aligned(4);
};

/* raid transport support */
@@ -2834,7 +2834,6 @@ _scsih_fw_event_free(struct MPT2SAS_ADAPTER *ioc, struct fw_event_work

spin_lock_irqsave(&ioc->fw_event_lock, flags);
list_del(&fw_event->list);
- kfree(fw_event->event_data);
kfree(fw_event);
spin_unlock_irqrestore(&ioc->fw_event_lock, flags);
}
@@ -3520,7 +3519,8 @@ _scsih_check_topo_delete_events(struct MPT2SAS_ADAPTER *ioc,
if (fw_event->event != MPI2_EVENT_SAS_TOPOLOGY_CHANGE_LIST ||
fw_event->ignore)
continue;
- local_event_data = fw_event->event_data;
+ local_event_data = (Mpi2EventDataSasTopologyChangeList_t *)
+ fw_event->event_data;
if (local_event_data->ExpStatus ==
MPI2_EVENT_SAS_TOPO_ES_ADDED ||
local_event_data->ExpStatus ==
@@ -5504,7 +5504,9 @@ _scsih_sas_topology_change_event(struct MPT2SAS_ADAPTER *ioc,
u64 sas_address;
unsigned long flags;
u8 link_rate, prev_link_rate;
- Mpi2EventDataSasTopologyChangeList_t *event_data = fw_event->event_data;
+ Mpi2EventDataSasTopologyChangeList_t *event_data =
+ (Mpi2EventDataSasTopologyChangeList_t *)
+ fw_event->event_data;

#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
@@ -5699,7 +5701,8 @@ _scsih_sas_device_status_change_event(struct MPT2SAS_ADAPTER *ioc,
u64 sas_address;
unsigned long flags;
Mpi2EventDataSasDeviceStatusChange_t *event_data =
- fw_event->event_data;
+ (Mpi2EventDataSasDeviceStatusChange_t *)
+ fw_event->event_data;

#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
@@ -5794,6 +5797,7 @@ _scsih_sas_enclosure_dev_status_change_event(struct MPT2SAS_ADAPTER *ioc,
#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
_scsih_sas_enclosure_dev_status_change_event_debug(ioc,
+ (Mpi2EventDataSasEnclDevStatusChange_t *)
fw_event->event_data);
#endif
}
@@ -5818,7 +5822,9 @@ _scsih_sas_broadcast_primitive_event(struct MPT2SAS_ADAPTER *ioc,
u32 termination_count;
u32 query_count;
Mpi2SCSITaskManagementReply_t *mpi_reply;
- Mpi2EventDataSasBroadcastPrimitive_t *event_data = fw_event->event_data;
+ Mpi2EventDataSasBroadcastPrimitive_t *event_data =
+ (Mpi2EventDataSasBroadcastPrimitive_t *)
+ fw_event->event_data;
u16 ioc_status;
unsigned long flags;
int r;
@@ -5969,7 +5975,9 @@ static void
_scsih_sas_discovery_event(struct MPT2SAS_ADAPTER *ioc,
struct fw_event_work *fw_event)
{
- Mpi2EventDataSasDiscovery_t *event_data = fw_event->event_data;
+ Mpi2EventDataSasDiscovery_t *event_data =
+ (Mpi2EventDataSasDiscovery_t *)
+ fw_event->event_data;

#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if (ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK) {
@@ -6357,7 +6365,9 @@ _scsih_sas_ir_config_change_event(struct MPT2SAS_ADAPTER *ioc,
Mpi2EventIrConfigElement_t *element;
int i;
u8 foreign_config;
- Mpi2EventDataIrConfigChangeList_t *event_data = fw_event->event_data;
+ Mpi2EventDataIrConfigChangeList_t *event_data =
+ (Mpi2EventDataIrConfigChangeList_t *)
+ fw_event->event_data;

#ifdef CONFIG_SCSI_MPT2SAS_LOGGING
if ((ioc->logging_level & MPT_DEBUG_EVENT_WORK_TASK)
@@ -6425,7 +6435,9 @@ _scsih_sas_ir_volume_event(struct MPT2SAS_ADAPTER *ioc,
u16 handle;
u32 state;
int rc;
- Mpi2EventDataIrVolume_t *event_data = fw_event->event_data;
+ Mpi2EventDataIrVolume_t *event_data =
+ (Mpi2EventDataIrVolume_t *)
+ fw_event->event_data;

if (ioc->shost_recovery)
return;
@@ -6509,7 +6521,9 @@ _scsih_sas_ir_physical_disk_event(struct MPT2SAS_ADAPTER *ioc,
Mpi2ConfigReply_t mpi_reply;
Mpi2SasDevicePage0_t sas_device_pg0;
u32 ioc_status;
- Mpi2EventDataIrPhysicalDisk_t *event_data = fw_event->event_data;
+ Mpi2EventDataIrPhysicalDisk_t *event_data =
+ (Mpi2EventDataIrPhysicalDisk_t *)
+ fw_event->event_data;
u64 sas_address;

if (ioc->shost_recovery)
@@ -6632,7 +6646,9 @@ static void
_scsih_sas_ir_operation_status_event(struct MPT2SAS_ADAPTER *ioc,
struct fw_event_work *fw_event)
{
- Mpi2EventDataIrOperationStatus_t *event_data = fw_event->event_data;
+ Mpi2EventDataIrOperationStatus_t *event_data =
+ (Mpi2EventDataIrOperationStatus_t *)
+ fw_event->event_data;
static struct _raid_device *raid_device;
unsigned long flags;
u16 handle;
@@ -7592,23 +7608,15 @@ mpt2sas_scsih_event_callback(struct MPT2SAS_ADAPTER *ioc, u8 msix_index,
return;
}

- fw_event = kzalloc(sizeof(struct fw_event_work), GFP_ATOMIC);
- if (!fw_event) {
- printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
- ioc->name, __FILE__, __LINE__, __func__);
- return;
- }
sz = le16_to_cpu(mpi_reply->EventDataLength) * 4;
- fw_event->event_data = kzalloc(sz, GFP_ATOMIC);
- if (!fw_event->event_data) {
+ fw_event = kzalloc(sizeof(*fw_event) + sz, GFP_ATOMIC);
+ if (!fw_event) {
printk(MPT2SAS_ERR_FMT "failure at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
- kfree(fw_event);
return;
}

- memcpy(fw_event->event_data, mpi_reply->EventData,
- sz);
+ memcpy(fw_event->event_data, mpi_reply->EventData, sz);
fw_event->ioc = ioc;
fw_event->VF_ID = mpi_reply->VF_ID;
fw_event->VP_ID = mpi_reply->VP_ID;
--
1.7.10.4