[PATCH] igb: Garbled output for "ethtool -m"

[PATCH] igb: Garbled output for "ethtool -m"

[Doron Shikmoni]

Hello,

Garbled output for "ethtool -m ethX", in igb-driven NICs with module /
plugin EEPROM (i.e. SFP information). Each output data byte appears
duplicated.

In igb_ethtool.c, igb_get_module_eeprom() is reading the EEPROM via i2c;
the eeprom offset for each word that's read via igb_read_phy_reg_i2c()
was passed in #words, whereas it needs to be a byte offset.
This patches fixes the bug.

Signed-off-by: Doron Shikmoni <doron.shikmoni@gmail.com>
---
 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
index 1d329f1..7bcc0e1e 100644
--- a/drivers/net/ethernet/intel/igb/igb_ethtool.c
+++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c
@@ -2831,7 +2831,7 @@ static int igb_get_module_eeprom(struct net_device *netdev,
 
 	/* Read EEPROM block, SFF-8079/SFF-8472, word at a time */
 	for (i = 0; i < last_word - first_word + 1; i++) {
-		status = igb_read_phy_reg_i2c(hw, first_word + i, &dataword[i]);
+		status = igb_read_phy_reg_i2c(hw, (first_word + i) * 2, &dataword[i]);
 		if (status) {
 			/* Error occurred while reading module */
 			kfree(dataword);
-- 
1.7.10.4

RE: [Intel-wired-lan] [PATCH] igb: Garbled output for "ethtool -m"

[Brown, Aaron F]

> From: Intel-wired-lan [intel-wired-lan-bounces@lists.osuosl.org] on behalf of Doron Shikmoni [doron.shikmoni@gmail.com]
> Sent: Tuesday, February 16, 2016 11:34 PM
> To: intel-wired-lan@lists.osuosl.org
> Cc: netdev@vger.kernel.org
> Subject: [Intel-wired-lan] [PATCH] igb: Garbled output for "ethtool -m"
> 
> Hello,
> 
> Garbled output for "ethtool -m ethX", in igb-driven NICs with module /
> plugin EEPROM (i.e. SFP information). Each output data byte appears
> duplicated.
> 
> In igb_ethtool.c, igb_get_module_eeprom() is reading the EEPROM via i2c;
> the eeprom offset for each word that's read via igb_read_phy_reg_i2c()
> was passed in #words, whereas it needs to be a byte offset.
> This patches fixes the bug.
>
> Signed-off-by: Doron Shikmoni <doron.shikmoni@gmail.com>
> ---
>  drivers/net/ethernet/intel/igb/igb_ethtool.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Checkpatch complains that you pushed the line over 80 characters:
------------------------
u1463:[0]/usr/src/kernels/next-queue> git format-patch $item -1 --stdout|./scripts/checkpatch.pl -
WARNING: line over 80 characters
#29: FILE: drivers/net/ethernet/intel/igb/igb_ethtool.c:3010:
+               status = igb_read_phy_reg_i2c(hw, (first_word + i) * 2, &dataword[i]);

total: 0 errors, 1 warnings, 0 checks, 8 lines checked

Your patch has style problems, please review.

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
u1463:[0]/usr/src/kernels/next-queue> 
------------------------

But functionally seems good.  I'll let Jeff choose whether to be a stickler for the warning or not, so...

Tested-by: Aaron Brown <aaron.f.brown@intel.com>