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Message-ID: <4B27DD2E.1020409@gmail.com>
Date: Tue, 15 Dec 2009 20:02:06 +0100
From: Roel Kluin <roel.kluin@...il.com>
To: Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
Jesse Brandeburg <jesse.brandeburg@...el.com>,
Bruce Allan <bruce.w.allan@...el.com>,
PJ Waskiewicz <peter.p.waskiewicz.jr@...el.com>,
John Ronciak <john.ronciak@...el.com>,
e1000-devel@...ts.sourceforge.net,
Andrew Morton <akpm@...ux-foundation.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] e1000: Fix tests of unsigned in e1000_tx_map()
The variables count and i are unsigned so the (<|>=) 0 tests do not work.
Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
Found using coccinelle: http://coccinelle.lip6.fr/
This should be all with this pattern.
As before I wasn't able to test this patch, so please review.
drivers/net/e1000/e1000_main.c | 10 +++++-----
drivers/net/e1000e/netdev.c | 10 +++++-----
drivers/net/igb/igb_main.c | 10 +++++-----
drivers/net/igbvf/netdev.c | 10 +++++-----
drivers/net/ixgb/ixgb_main.c | 10 +++++-----
drivers/net/ixgbe/ixgbe_main.c | 10 +++++-----
6 files changed, 30 insertions(+), 30 deletions(-)
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 7e855f9..8d9da69 100644
--- 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 762b697..9be8d5d 100644
--- 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/igb/igb_main.c b/drivers/net/igb/igb_main.c
index 78963a0..2b08fdd 100644
--- a/drivers/net/igb/igb_main.c
+++ b/drivers/net/igb/igb_main.c
@@ -3627,14 +3627,14 @@ 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];
igb_unmap_and_free_tx_resource(tx_ring, buffer_info);
}
diff --git a/drivers/net/igbvf/netdev.c b/drivers/net/igbvf/netdev.c
index e9dd95f..2eb95fe 100644
--- 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..fffd254 100644
--- 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 35ea8c9..60b3551 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5143,14 +5143,14 @@ 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);
}
--
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