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authorStephen Hemminger <shemminger@osdl.org>2006-03-21 10:57:01 -0800
committerJeff Garzik <jeff@garzik.org>2006-03-21 16:00:50 -0500
commitc3da14474063e71686039d961d14785a9c2971ae (patch)
treee98f5e56f94abb911cc61df12e026e626c651c7c /drivers/net/skge.c
parentcfc3ed796eda2c41fb20986d831ed56c0474279d (diff)
[PATCH] skge: check the allocation of ring buffer
The SysKonnect Genesis and Yukon chip sets have restrictions on the possible control block area. The memory needs to not cross 4 Gig boundary, and it needs to be 8 byte aligned. This patch checks and fails to bring the device up if region is unacceptable. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/net/skge.c')
-rw-r--r--drivers/net/skge.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/drivers/net/skge.c b/drivers/net/skge.c
index 4fc9333f074..deca5066a44 100644
--- a/drivers/net/skge.c
+++ b/drivers/net/skge.c
@@ -727,7 +727,7 @@ static struct ethtool_ops skge_ethtool_ops = {
* Allocate ring elements and chain them together
* One-to-one association of board descriptors with ring elements
*/
-static int skge_ring_alloc(struct skge_ring *ring, void *vaddr, u64 base)
+static int skge_ring_alloc(struct skge_ring *ring, void *vaddr, u32 base)
{
struct skge_tx_desc *d;
struct skge_element *e;
@@ -2168,6 +2168,14 @@ static int skge_up(struct net_device *dev)
if (!skge->mem)
return -ENOMEM;
+ BUG_ON(skge->dma & 7);
+
+ if ((u64)skge->dma >> 32 != ((u64) skge->dma + skge->mem_size) >> 32) {
+ printk(KERN_ERR PFX "pci_alloc_consistent region crosses 4G boundary\n");
+ err = -EINVAL;
+ goto free_pci_mem;
+ }
+
memset(skge->mem, 0, skge->mem_size);
if ((err = skge_ring_alloc(&skge->rx_ring, skge->mem, skge->dma)))