[SCSI] mpt fusion: Fix sparse warnings

List below is output from C=2 sparse compilation, which are fixed with
this patch.

1) mptspi: pg0 is defined in x86 version of include/asm/pgtable.h

2) mptsas: context imbalance in 'mptsas_probe' different lock contexts
   for basic block

3) mptbase: from mpt_attach - cast adds address space to expression

4) mptbase: from mpt_do_upload - request[] is bad constant expression

Signed-off-by: Eric Moore <Eric.Moore@lsi.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

3 files changed, 28 insertions, 22 deletions

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index 5987f8b6a59b..52fb216dfe74 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -1452,6 +1452,7 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
 {
         MPT_ADAPTER     *ioc;
         u8              __iomem *mem;
+        u8              __iomem *pmem;
         unsigned long    mem_phys;
         unsigned long    port;
         u32              msize;
@@ -1576,11 +1577,9 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
         ioc->chip = (SYSIF_REGS __iomem *)mem;
 
         /* Save Port IO values in case we need to do downloadboot */
-        {
-                u8 *pmem = (u8*)port;
-                ioc->pio_mem_phys = port;
-                ioc->pio_chip = (SYSIF_REGS __iomem *)pmem;
-        }
+        ioc->pio_mem_phys = port;
+        pmem = (u8 __iomem *)port;
+        ioc->pio_chip = (SYSIF_REGS __iomem *)pmem;
 
         pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
         mpt_get_product_name(pdev->vendor, pdev->device, revision, ioc->prod_name);
@@ -3103,7 +3102,6 @@ mpt_free_fw_memory(MPT_ADAPTER *ioc)
 static int
 mpt_do_upload(MPT_ADAPTER *ioc, int sleepFlag)
 {
-        u8                       request[ioc->req_sz];
         u8                       reply[sizeof(FWUploadReply_t)];
         FWUpload_t              *prequest;
         FWUploadReply_t         *preply;
@@ -3129,11 +3127,16 @@ mpt_do_upload(MPT_ADAPTER *ioc, int sleepFlag)
                 return -ENOMEM;
         }
 
-        prequest = (FWUpload_t *)&request;
-        preply = (FWUploadReply_t *)&reply;
+        prequest = (sleepFlag == NO_SLEEP) ? kzalloc(ioc->req_sz, GFP_ATOMIC) :
+            kzalloc(ioc->req_sz, GFP_KERNEL);
+        if (!prequest) {
+                dinitprintk(ioc, printk(MYIOC_s_DEBUG_FMT "fw upload failed "
+                    "while allocating memory \n", ioc->name));
+                mpt_free_fw_memory(ioc);
+                return -ENOMEM;
+        }
 
-        /*  Destination...  */
-        memset(prequest, 0, ioc->req_sz);
+        preply = (FWUploadReply_t *)&reply;
 
         reply_sz = sizeof(reply);
         memset(preply, 0, reply_sz);
@@ -3145,11 +3148,12 @@ mpt_do_upload(MPT_ADAPTER *ioc, int sleepFlag)
         ptcsge->DetailsLength = 12;
         ptcsge->Flags = MPI_SGE_FLAGS_TRANSACTION_ELEMENT;
         ptcsge->ImageSize = cpu_to_le32(sz);
+        ptcsge++;
 
         sgeoffset = sizeof(FWUpload_t) - sizeof(SGE_MPI_UNION) + sizeof(FWUploadTCSGE_t);
 
         flagsLength = MPT_SGE_FLAGS_SSIMPLE_READ | sz;
-        mpt_add_sge(&request[sgeoffset], flagsLength, ioc->cached_fw_dma);
+        mpt_add_sge((char *)ptcsge, flagsLength, ioc->cached_fw_dma);
 
         sgeoffset += sizeof(u32) + sizeof(dma_addr_t);
         dinitprintk(ioc, printk(MYIOC_s_INFO_FMT ": Sending FW Upload (req @ %p) sgeoffset=%d \n",
@@ -3184,6 +3188,7 @@ mpt_do_upload(MPT_ADAPTER *ioc, int sleepFlag)
                         ioc->name));
                 mpt_free_fw_memory(ioc);
         }
+        kfree(prequest);
 
         return cmdStatus;
 }
diff --git a/drivers/message/fusion/mptsas.c b/drivers/message/fusion/mptsas.c
index adbdbd45e0c9..4c641c6f98a6 100644
--- a/drivers/message/fusion/mptsas.c
+++ b/drivers/message/fusion/mptsas.c
@@ -3224,6 +3224,7 @@ mptsas_probe(struct pci_dev *pdev, const struct pci_device_id *id)
         hd->ScsiLookup = kcalloc(ioc->req_depth, sizeof(void *), GFP_ATOMIC);
         if (!hd->ScsiLookup) {
                 error = -ENOMEM;
+                spin_unlock_irqrestore(&ioc->FreeQlock, flags);
                 goto out_mptsas_probe;
         }
 
diff --git a/drivers/message/fusion/mptspi.c b/drivers/message/fusion/mptspi.c
index 3c24928e3cec..ed6a778b6707 100644
--- a/drivers/message/fusion/mptspi.c
+++ b/drivers/message/fusion/mptspi.c
@@ -516,8 +516,8 @@ static int mptspi_read_spi_device_pg0(struct scsi_target *starget,
         struct Scsi_Host *shost = dev_to_shost(&starget->dev);
         struct _MPT_SCSI_HOST *hd = shost_priv(shost);
         struct _MPT_ADAPTER *ioc = hd->ioc;
-        struct _CONFIG_PAGE_SCSI_DEVICE_0 *pg0;
-        dma_addr_t pg0_dma;
+        struct _CONFIG_PAGE_SCSI_DEVICE_0 *spi_dev_pg0;
+        dma_addr_t spi_dev_pg0_dma;
         int size;
         struct _x_config_parms cfg;
         struct _CONFIG_PAGE_HEADER hdr;
@@ -535,8 +535,8 @@ static int mptspi_read_spi_device_pg0(struct scsi_target *starget,
         size += 2048;
         */
 
-        pg0 = dma_alloc_coherent(&ioc->pcidev->dev, size, &pg0_dma, GFP_KERNEL);
-        if (pg0 == NULL) {
+        spi_dev_pg0 = dma_alloc_coherent(&ioc->pcidev->dev, size, &spi_dev_pg0_dma, GFP_KERNEL);
+        if (spi_dev_pg0 == NULL) {
                 starget_printk(MYIOC_s_ERR_FMT, starget,
                     "dma_alloc_coherent for parameters failed\n", ioc->name);
                 return -EINVAL;
@@ -552,7 +552,7 @@ static int mptspi_read_spi_device_pg0(struct scsi_target *starget,
         memset(&cfg, 0, sizeof(cfg));
 
         cfg.cfghdr.hdr = &hdr;
-        cfg.physAddr = pg0_dma;
+        cfg.physAddr = spi_dev_pg0_dma;
         cfg.action = MPI_CONFIG_ACTION_PAGE_READ_CURRENT;
         cfg.dir = 0;
         cfg.pageAddr = starget->id;
@@ -562,12 +562,12 @@ static int mptspi_read_spi_device_pg0(struct scsi_target *starget,
                 goto out_free;
         }
         err = 0;
-        memcpy(pass_pg0, pg0, size);
+        memcpy(pass_pg0, spi_dev_pg0, size);
 
-        mptspi_print_read_nego(hd, starget, le32_to_cpu(pg0->NegotiatedParameters));
+        mptspi_print_read_nego(hd, starget, le32_to_cpu(spi_dev_pg0->NegotiatedParameters));
 
  out_free:
-        dma_free_coherent(&ioc->pcidev->dev, size, pg0, pg0_dma);
+        dma_free_coherent(&ioc->pcidev->dev, size, spi_dev_pg0, spi_dev_pg0_dma);
         return err;
 }
 
@@ -594,11 +594,11 @@ static u32 mptspi_getRP(struct scsi_target *starget)
 static void mptspi_read_parameters(struct scsi_target *starget)
 {
         int nego;
-        struct _CONFIG_PAGE_SCSI_DEVICE_0 pg0;
+        struct _CONFIG_PAGE_SCSI_DEVICE_0 spi_dev_pg0;
 
-        mptspi_read_spi_device_pg0(starget, &pg0);
+        mptspi_read_spi_device_pg0(starget, &spi_dev_pg0);
 
-        nego = le32_to_cpu(pg0.NegotiatedParameters);
+        nego = le32_to_cpu(spi_dev_pg0.NegotiatedParameters);
 
         spi_iu(starget) = (nego & MPI_SCSIDEVPAGE0_NP_IU) ? 1 : 0;
         spi_dt(starget) = (nego & MPI_SCSIDEVPAGE0_NP_DT) ? 1 : 0;