[net-next 11/15] i40e: avoid large memcpy by assigning struct

[Jeff Kirsher]

From: Jacob Keller <jacob.e.kel...@intel.com>

Assign the i40e_pf structure directly instead of using a large memcpy,
which avoids a sparse warning and lets the compiler optimize the copy
since it knows the size of the structure in advance.

Change-ID: I17604e23be2616521eb760290befcb767b52b3f7
Signed-off-by: Jacob Keller <jacob.e.kel...@intel.com>
Reviewed-by: Jesse Brandeburg <jesse.brandeb...@intel.com>
Tested-by: Andrew Bowers <andrewx.bow...@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirs...@intel.com>
---
 drivers/net/ethernet/intel/i40e/i40e_debugfs.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c 
b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
index 7aae056..3948587 100644
--- a/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
+++ b/drivers/net/ethernet/intel/i40e/i40e_debugfs.c
@@ -185,9 +185,11 @@ static ssize_t i40e_dbg_dump_write(struct file *filp,
                if (i40e_dbg_prep_dump_buf(pf, buflen)) {
                        p = i40e_dbg_dump_buf;
 
-                       len = sizeof(struct i40e_pf);
-                       memcpy(p, pf, len);
-                       p += len;
+                       /* avoid use of memcpy here due to sparse warning
+                        * about copy size.
+                        */
+                       *((struct i40e_pf *)p) = *pf;
+                       p += sizeof(struct i40e_pf);
 
                        len = (sizeof(struct i40e_aq_desc)
                                        * pf->hw.aq.num_asq_entries);
-- 
2.5.0