e1000/e1000e/igb/igbvf/ixgb/ixgbe: Fix tests of unsigned in *_tx_map()

The variable count and i are unsigned so the (<|>=)0 tests do not work.

Signed-off-by: Roel Kluin <roel.kluin@gmail.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/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 7e855f9..b3f67b4 100644 (file)
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -2802,13 +2802,13 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
 dma_error:
        dev_err(&pdev->dev, "TX DMA map failed\n");
        buffer_info->dma = 0;
-       count--;
-
-       while (count >= 0) {
+       if (count)
                count--;
-               i--;
-               if (i < 0)
+
+       while (count--) {
+               if (i==0)
                        i += tx_ring->count;
+               i--;
                buffer_info = &tx_ring->buffer_info[i];
                e1000_unmap_and_free_tx_resource(adapter, buffer_info);
        }

diff --git a/drivers/net/e1000e/netdev.c b/drivers/net/e1000e/netdev.c
index c45965a..f91f247 100644 (file)
--- a/drivers/net/e1000e/netdev.c
+++ b/drivers/net/e1000e/netdev.c
@@ -3962,13 +3962,13 @@ static int e1000_tx_map(struct e1000_adapter *adapter,
 dma_error:
        dev_err(&pdev->dev, "TX DMA map failed\n");
        buffer_info->dma = 0;
-       count--;
-
-       while (count >= 0) {
+       if (count)
                count--;
-               i--;
-               if (i < 0)
+
+       while (count--) {
+               if (i==0)
                        i += tx_ring->count;
+               i--;
                buffer_info = &tx_ring->buffer_info[i];
                e1000_put_txbuf(adapter, buffer_info);;
        }

diff --git a/drivers/net/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
index 0dbd032..10e038a 100644 (file)
--- a/drivers/net/igbvf/netdev.c
+++ b/drivers/net/igbvf/netdev.c
@@ -2163,14 +2163,14 @@ dma_error:
        buffer_info->length = 0;
        buffer_info->next_to_watch = 0;
        buffer_info->mapped_as_page = false;
-       count--;
+       if (count)
+               count--;
 
        /* clear timestamp and dma mappings for remaining portion of packet */
-       while (count >= 0) {
-               count--;
-               i--;
-               if (i < 0)
+       while (count--) {
+               if (i==0)
                        i += tx_ring->count;
+               i--;
                buffer_info = &tx_ring->buffer_info[i];
                igbvf_put_txbuf(adapter, buffer_info);
        }

diff --git a/drivers/net/ixgb/ixgb_main.c b/drivers/net/ixgb/ixgb_main.c
index bcd0f01..593d1a4 100644 (file)
--- a/drivers/net/ixgb/ixgb_main.c
+++ b/drivers/net/ixgb/ixgb_main.c
@@ -1363,13 +1363,13 @@ ixgb_tx_map(struct ixgb_adapter *adapter, struct sk_buff *skb,
 dma_error:
        dev_err(&pdev->dev, "TX DMA map failed\n");
        buffer_info->dma = 0;
-       count--;
-
-       while (count >= 0) {
+       if (count)
                count--;
-               i--;
-               if (i < 0)
+
+       while (count--) {
+               if (i==0)
                        i += tx_ring->count;
+               i--;
                buffer_info = &tx_ring->buffer_info[i];
                ixgb_unmap_and_free_tx_resource(adapter, buffer_info);
        }

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 9c9202f..6d61add 100644 (file)
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5167,14 +5167,14 @@ dma_error:
        tx_buffer_info->dma = 0;
        tx_buffer_info->time_stamp = 0;
        tx_buffer_info->next_to_watch = 0;
-       count--;
+       if (count)
+               count--;
 
        /* clear timestamp and dma mappings for remaining portion of packet */
-       while (count >= 0) {
-               count--;
-               i--;
-               if (i < 0)
+       while (count--) {
+               if (i==0)
                        i += tx_ring->count;
+               i--;
                tx_buffer_info = &tx_ring->tx_buffer_info[i];
                ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
        }