mptfusion: make adapter prod_name[] a pointer

The struct _MPT_ADAPTER doesn't need a full copy of the product string,
so prod_name can point to the string literal storage that the driver
already provides.

Avoids the following smatch warning:

  drivers/message/fusion/mptbase.c:2858 MptDisplayIocCapabilities()
    warn: this array is probably non-NULL. 'ioc->prod_name'

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>

2 files changed, 6 insertions, 7 deletions

diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c
index ea30033a477c..9d4c7825a5f2 100644
--- a/drivers/message/fusion/mptbase.c
+++ b/drivers/message/fusion/mptbase.c
@@ -1408,8 +1408,8 @@ mpt_verify_adapter(int iocid, MPT_ADAPTER **iocpp)
  *      in /proc/mpt/summary and /sysfs/class/scsi_host/host<X>/version_product
  *
  **/
-static void
-mpt_get_product_name(u16 vendor, u16 device, u8 revision, char *prod_name)
+static const char*
+mpt_get_product_name(u16 vendor, u16 device, u8 revision)
 {
         char *product_str = NULL;
 
@@ -1635,8 +1635,7 @@ mpt_get_product_name(u16 vendor, u16 device, u8 revision, char *prod_name)
         }
 
  out:
-        if (product_str)
-                sprintf(prod_name, "%s", product_str);
+        return product_str;
 }
 
 /**
@@ -1887,8 +1886,8 @@ mpt_attach(struct pci_dev *pdev, const struct pci_device_id *id)
         dinitprintk(ioc, printk(MYIOC_s_INFO_FMT "facts @ %p, pfacts[0] @ %p\n",
             ioc->name, &ioc->facts, &ioc->pfacts[0]));
 
-        mpt_get_product_name(pdev->vendor, pdev->device, pdev->revision,
-                             ioc->prod_name);
+        ioc->prod_name = mpt_get_product_name(pdev->vendor, pdev->device,
+                                              pdev->revision);
 
         switch (pdev->device)
         {
diff --git a/drivers/message/fusion/mptbase.h b/drivers/message/fusion/mptbase.h
index f37ea6fdc6ae..8f14090b8b71 100644
--- a/drivers/message/fusion/mptbase.h
+++ b/drivers/message/fusion/mptbase.h
@@ -605,7 +605,7 @@ typedef struct _MPT_ADAPTER
         int                      id;            /* Unique adapter id N {0,1,2,...} */
         int                      pci_irq;       /* This irq           */
         char                     name[MPT_NAME_LENGTH]; /* "iocN"             */
-        char                     prod_name[MPT_NAME_LENGTH];    /* "LSIFC9x9"         */
+        const char               *prod_name;    /* "LSIFC9x9"         */
 #ifdef CONFIG_FUSION_LOGGING
         /* used in mpt_display_event_info */
         char                     evStr[EVENT_DESCR_STR_SZ];