vxge: Align the memory only if it is misaligned.

- Align the memory only if it is misaligned.

Signed-off-by: Sreenivasa Honnur <sreenivasa.honnur@neterion.com>
Signed-off-by: Ramkrishna Vepa <ram.vepa@neterion.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 16 insertions, 4 deletions

diff --git a/drivers/net/vxge/vxge-config.h b/drivers/net/vxge/vxge-config.h
index e7877df092f3..01595242a6e8 100644
--- a/drivers/net/vxge/vxge-config.h
+++ b/drivers/net/vxge/vxge-config.h
@@ -1914,20 +1914,32 @@ static inline void *vxge_os_dma_malloc(struct pci_dev *pdev,
         gfp_t flags;
         void *vaddr;
         unsigned long misaligned = 0;
+        int realloc_flag = 0;
         *p_dma_acch = *p_dmah = NULL;
 
         if (in_interrupt())
                 flags = GFP_ATOMIC | GFP_DMA;
         else
                 flags = GFP_KERNEL | GFP_DMA;
-
-        size += VXGE_CACHE_LINE_SIZE;
-
+realloc:
         vaddr = kmalloc((size), flags);
         if (vaddr == NULL)
                 return vaddr;
-        misaligned = (unsigned long)VXGE_ALIGN(*((u64 *)&vaddr),
+        misaligned = (unsigned long)VXGE_ALIGN((unsigned long)vaddr,
                                 VXGE_CACHE_LINE_SIZE);
+        if (realloc_flag)
+                goto out;
+
+        if (misaligned) {
+                /* misaligned, free current one and try allocating
+                 * size + VXGE_CACHE_LINE_SIZE memory
+                 */
+                kfree((void *) vaddr);
+                size += VXGE_CACHE_LINE_SIZE;
+                realloc_flag = 1;
+                goto realloc;
+        }
+out:
         *(unsigned long *)p_dma_acch = misaligned;
         vaddr = (void *)((u8 *)vaddr + misaligned);
         return vaddr;