igb: update tx DMA mapping error handling
This updates the tx DMA mapping error handling code to
resemble e1000e/ixgbe.
Signed-off-by: Nicholas Nunley <nicholasx.d.nunley@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/igb/igb_main.c b/drivers/net/igb/igb_main.c
index ab7c5e9..f588e49 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3647,14 +3647,12 @@
buffer_info->length = 0;
buffer_info->next_to_watch = 0;
buffer_info->mapped_as_page = false;
- count--;
/* clear timestamp and dma mappings for remaining portion of packet */
- while (count >= 0) {
- count--;
+ while (count--) {
+ if (i == 0)
+ i = tx_ring->count;
i--;
- if (i < 0)
- i += tx_ring->count;
buffer_info = &tx_ring->buffer_info[i];
igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
}