scsi: megaraid_mbox: remove set but not used variables

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/scsi/megaraid/megaraid_mbox.c: In function 'megaraid_reset_handler':
drivers/scsi/megaraid/megaraid_mbox.c:2580:7: warning:
 variable 'recovering' set but not used [-Wunused-but-set-variable]

drivers/scsi/megaraid/megaraid_mbox.c: In function 'mbox_post_sync_cmd':
drivers/scsi/megaraid/megaraid_mbox.c:2728:12: warning:
 variable 'mbox64' set but not used [-Wunused-but-set-variable]

drivers/scsi/megaraid/megaraid_mbox.c: In function 'megaraid_mbox_support_random_del':
drivers/scsi/megaraid/megaraid_mbox.c:3138:11: warning:
 variable 'mbox' set but not used [-Wunused-but-set-variable]

drivers/scsi/megaraid/megaraid_mbox.c: In function 'megaraid_mbox_flush_cache':
drivers/scsi/megaraid/megaraid_mbox.c:3266:10: warning:
 variable 'mbox' set but not used [-Wunused-but-set-variable]

drivers/scsi/megaraid/megaraid_mbox.c: In function 'megaraid_mbox_fire_sync_cmd':
drivers/scsi/megaraid/megaraid_mbox.c:3302:12: warning:
 variable 'mbox64' set but not used [-Wunused-but-set-variable]

drivers/scsi/megaraid/megaraid_mbox.c: In function 'gather_hbainfo':
drivers/scsi/megaraid/megaraid_mbox.c:3797:10: warning:
 variable 'dmajor' set but not used [-Wunused-but-set-variable]

[mkp: applied by hand due to conflict with hch's DMA cleanup]
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/megaraid/megaraid_mbox.c

@@ -201,13 +201,6 @@ int mraid_debug_level = CL_ANN;
 module_param_named(debug_level, mraid_debug_level, int, 0);
 MODULE_PARM_DESC(debug_level, "Debug level for driver (default=0)");
 
-/*
- * ### global data ###
- */
-static uint8_t megaraid_mbox_version[8] =
-	{ 0x02, 0x20, 0x04, 0x06, 3, 7, 20, 5 };
-
-
 /*
  * PCI table for all supported controllers.
  */
@@ -2544,7 +2537,6 @@ megaraid_reset_handler(struct scsi_cmnd *scp)
 	uint8_t		raw_mbox[sizeof(mbox_t)];
 	int		rval;
 	int		recovery_window;
-	int		recovering;
 	int		i;
 	uioc_t		*kioc;
 
@@ -2558,7 +2550,6 @@ megaraid_reset_handler(struct scsi_cmnd *scp)
 		return FAILED;
 	}
 
-
 	// Under exceptional conditions, FW can take up to 3 minutes to
 	// complete command processing. Wait for additional 2 minutes for the
 	// pending commands counter to go down to 0. If it doesn't, let the
@@ -2607,8 +2598,6 @@ megaraid_reset_handler(struct scsi_cmnd *scp)
 
 	recovery_window = MBOX_RESET_WAIT + MBOX_RESET_EXT_WAIT;
 
-	recovering = adapter->outstanding_cmds;
-
 	for (i = 0; i < recovery_window; i++) {
 
 		megaraid_ack_sequence(adapter);
@@ -2692,13 +2681,10 @@ static int
 mbox_post_sync_cmd(adapter_t *adapter, uint8_t raw_mbox[])
 {
 	mraid_device_t	*raid_dev = ADAP2RAIDDEV(adapter);
-	mbox64_t	*mbox64;
 	mbox_t		*mbox;
 	uint8_t		status;
 	int		i;
 
-
-	mbox64	= raid_dev->mbox64;
 	mbox	= raid_dev->mbox;
 
 	/*
@@ -3102,7 +3088,6 @@ megaraid_mbox_support_ha(adapter_t *adapter, uint16_t *init_id)
 static int
 megaraid_mbox_support_random_del(adapter_t *adapter)
 {
-	mbox_t		*mbox;
 	uint8_t		raw_mbox[sizeof(mbox_t)];
 	int		rval;
 
@@ -3124,8 +3109,6 @@ megaraid_mbox_support_random_del(adapter_t *adapter)
 		return 0;
 	}
 
-	mbox = (mbox_t *)raw_mbox;
-
 	memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
 
 	raw_mbox[0] = FC_DEL_LOGDRV;
@@ -3230,12 +3213,8 @@ megaraid_mbox_enum_raid_scsi(adapter_t *adapter)
 static void
 megaraid_mbox_flush_cache(adapter_t *adapter)
 {
-	mbox_t	*mbox;
 	uint8_t	raw_mbox[sizeof(mbox_t)];
 
-
-	mbox = (mbox_t *)raw_mbox;
-
 	memset((caddr_t)raw_mbox, 0, sizeof(mbox_t));
 
 	raw_mbox[0] = FLUSH_ADAPTER;
@@ -3266,7 +3245,6 @@ megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
 	mbox_t	*mbox;
 	uint8_t	raw_mbox[sizeof(mbox_t)];
 	mraid_device_t	*raid_dev = ADAP2RAIDDEV(adapter);
-	mbox64_t *mbox64;
 	int	status = 0;
 	int i;
 	uint32_t dword;
@@ -3277,7 +3255,6 @@ megaraid_mbox_fire_sync_cmd(adapter_t *adapter)
 
 	raw_mbox[0] = 0xFF;
 
-	mbox64	= raid_dev->mbox64;
 	mbox	= raid_dev->mbox;
 
 	/* Wait until mailbox is free */
@@ -3761,10 +3738,6 @@ megaraid_mbox_mm_done(adapter_t *adapter, scb_t *scb)
 static int
 gather_hbainfo(adapter_t *adapter, mraid_hba_info_t *hinfo)
 {
-	uint8_t	dmajor;
-
-	dmajor			= megaraid_mbox_version[0];
-
 	hinfo->pci_vendor_id	= adapter->pdev->vendor;
 	hinfo->pci_device_id	= adapter->pdev->device;
 	hinfo->subsys_vendor_id	= adapter->pdev->subsystem_vendor;