Re: [PATCH] igb: correct hardware type (i210/i211) check in igb_loopback_test()

On Tue, 2012-07-31 at 22:23 +0200, Jesper Juhl wrote:

On Wed, 25 Jul 2012, Wyborny, Carolyn wrote:

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-----Original Message-----
From: Jesper Juhl [mailto:jj@chaosbits.net] 
Sent: Wednesday, July 25, 2012 12:06 PM
To: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org; e1000-devel@lists.sourceforge.net;

Wyborny, Carolyn; Pieper, Jeffrey E; Kirsher, Jeffrey T; Rick Jones;
Ronciak, John; Brandeburg, Jesse; Allan, Bruce W; Skidmore, Donald C;
Rose, Gregory V; Waskiewicz Jr, Peter P; Duyck, Alexander H; David S.
Miller

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Subject: [PATCH] igb: correct hardware type (i210/i211) check in

igb_loopback_test()

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In the original code
...
    if ((adapter->hw.mac.type == e1000_i210)
            || (adapter->hw.mac.type == e1000_i210)) { ...
the second check of 'adapter->hw.mac.type' is pointless since it

tests for the exact same value as the first.

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After reading through a few other parts of the driver I believe

that the second check was actually intended to check for 'e1000_i211'

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rather than 'e1000_i210', but I admit that I'm not certain so

someone with more knowledge about this driver should ACK the patch
before it gets merged.

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Unfortunately I have no hardware to actually test this on, so it

is compile tested only.

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Signed-off-by: Jesper Juhl <redacted>
---
 drivers/net/ethernet/intel/igb/igb_ethtool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c

b/drivers/net/ethernet/intel/igb/igb_ethtool.c

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index a19c84c..ad489b7 100644

--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c

@@ -1783,7 +1783,7 @@ static int igb_loopback_test(struct

igb_adapter *adapter, u64 *data)

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            goto out;
    }
    if ((adapter->hw.mac.type == e1000_i210)
-           || (adapter->hw.mac.type == e1000_i210)) {
+           || (adapter->hw.mac.type == e1000_i211)) {
            dev_err(&adapter->pdev->dev,
                    "Loopback test not supported "
                    "on this part at this time.\n");
--
1.7.11.3

ACK.

Good catch.  Thanks Jesper!

Carolyn

Carolyn Wyborny
Linux Development
LAN Access Division
Intel Corporation

Thank you for the ack Carolyn.

David: will you take this in the networking tree? 

I have a few igb patches already, so I will send a pull request for Dave
with this patch added to the igb patches I already have.  Ok?