tg3: Add partial fragment unmapping code
The following patches are going to break skb fragments into smaller
sizes. This patch attempts to make the change easier to digest by only
addressing the skb teardown portion.
The patch modifies the driver to skip over any BDs that have a flag set
that indicates the BD isn't the beginning of an skb fragment. Such BDs
were a result of segmentation and do not need a pci_unmap_page() call.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index f6986ca..466dd7a 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2655,6 +2655,7 @@
struct tg3_tx_ring_info {
struct sk_buff *skb;
DEFINE_DMA_UNMAP_ADDR(mapping);
+ bool fragmented;
};
struct tg3_link_config {