summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorSreenivasa Honnur <Sreenivasa.Honnur@neterion.com>2010-03-29 00:09:47 +0200
committerDavid S. Miller <davem@davemloft.net>2010-03-30 01:57:21 +0200
commit47231f7fb49bed800dd806b4c32f881005d84de8 (patch)
tree9f2e28e4410373b2d8a8137652666784a9530a78
parentvxge: Fix starvation of receive ring controller when blasted by short packets. (diff)
downloadlinux-47231f7fb49bed800dd806b4c32f881005d84de8.tar.xz
linux-47231f7fb49bed800dd806b4c32f881005d84de8.zip
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>
-rw-r--r--drivers/net/vxge/vxge-config.h20
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;