[net-2.6 PATCH 1/2] ixgbe: Fix ixgbe_tx_map error path

[net-2.6 PATCH 1/2] ixgbe: Fix ixgbe_tx_map error path

[Jeff Kirsher]

From: Anton Blanchard <anton@samba.org>

Commit e5a43549f7a58509a91b299a51337d386697b92c (ixgbe: remove
skb_dma_map/unmap calls from driver) looks to have introduced a bug in
ixgbe_tx_map. If we get an error from a PCI DMA call, we loop backwards
through count until it becomes -1 and return that.

The caller of ixgbe_tx_map expects 0 on error, so return that instead.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_main.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index b5f64ad..37e2af0 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5179,7 +5179,7 @@ dma_error:
 		ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
 	}
 
-	return count;
+	return 0;
 }
 
 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,

[net-2.6 PATCH 2/2] ixgbe: Fix return of invalid txq

[Jeff Kirsher]

From: Krishna Kumar <krkumar2@in.ibm.com>

a developer had complained of getting lots of warnings:

"eth16 selects TX queue 98, but real number of TX queues is 64"

http://www.mail-archive.com/e1000-devel@lists.sourceforge.net/msg02200.html

As there was no follow up on that bug, I am submitting this
patch assuming that the other return points will not return
invalid txq's, and also that this fixes the bug (not tested).

Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
---

 drivers/net/ixgbe/ixgbe_main.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 37e2af0..7b7c848 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -5329,8 +5329,11 @@ static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
 	struct ixgbe_adapter *adapter = netdev_priv(dev);
 	int txq = smp_processor_id();
 
-	if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
+	if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
+		while (unlikely(txq >= dev->real_num_tx_queues))
+			txq -= dev->real_num_tx_queues;
 		return txq;
+	}
 
 #ifdef IXGBE_FCOE
 	if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&

Re: [net-2.6 PATCH 2/2] ixgbe: Fix return of invalid txq

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Wed, 03 Feb 2010 15:13:10 -0800

> From: Krishna Kumar <krkumar2@in.ibm.com>
> 
> a developer had complained of getting lots of warnings:
> 
> "eth16 selects TX queue 98, but real number of TX queues is 64"
> 
> http://www.mail-archive.com/e1000-devel@lists.sourceforge.net/msg02200.html
> 
> As there was no follow up on that bug, I am submitting this
> patch assuming that the other return points will not return
> invalid txq's, and also that this fixes the bug (not tested).
> 
> Signed-off-by: Krishna Kumar <krkumar2@in.ibm.com>
> Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
> Acked-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.

Re: [net-2.6 PATCH 1/2] ixgbe: Fix ixgbe_tx_map error path

[David Miller]

From: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Date: Wed, 03 Feb 2010 15:12:51 -0800

> From: Anton Blanchard <anton@samba.org>
> 
> Commit e5a43549f7a58509a91b299a51337d386697b92c (ixgbe: remove
> skb_dma_map/unmap calls from driver) looks to have introduced a bug in
> ixgbe_tx_map. If we get an error from a PCI DMA call, we loop backwards
> through count until it becomes -1 and return that.
> 
> The caller of ixgbe_tx_map expects 0 on error, so return that instead.
> 
> Signed-off-by: Anton Blanchard <anton@samba.org>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

Applied.