linux-kernel - RE: [Intel-wired-lan] [PATCH net] i40e: Fix firmware version comparison function

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Date: Wed, 6 Mar 2024 12:45:12 +0000
From: "Pucha, HimasekharX Reddy" <himasekharx.reddy.pucha@...el.com>
To: ivecera <ivecera@...hat.com>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>
CC: "moderated list:INTEL ETHERNET DRIVERS"
	<intel-wired-lan@...ts.osuosl.org>, "Brandeburg, Jesse"
	<jesse.brandeburg@...el.com>, open list <linux-kernel@...r.kernel.org>, "Eric
 Dumazet" <edumazet@...gle.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni
	<pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>
Subject: RE: [Intel-wired-lan] [PATCH net] i40e: Fix firmware version
 comparison function

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Ivan Vecera
> Sent: Wednesday, February 28, 2024 10:56 PM
> To: netdev@...r.kernel.org
> Cc: moderated list:INTEL ETHERNET DRIVERS <intel-wired-lan@...ts.osuosl.org>; Brandeburg, Jesse <jesse.brandeburg@...el.com>; open list <linux-kernel@...r.kernel.org>; Eric Dumazet <edumazet@...gle.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Jakub Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; David S. Miller <davem@...emloft.net>
> Subject: [Intel-wired-lan] [PATCH net] i40e: Fix firmware version comparison function
>
> Helper i40e_is_fw_ver_eq() compares incorrectly given firmware version
> as it returns true when the major version of running firmware is
> greater than the given major version that is wrong and results in
> failure during getting of DCB configuration where this helper is used.
> Fix the check and return true only if the running FW version is exactly
> equals to the given version.
>
> Reproducer:
> 1. Load i40e driver
> 2. Check dmesg output
>
> [root@...t ~]# modprobe i40e
> [root@...t ~]# dmesg | grep 'i40e.*DCB'
> [   74.750642] i40e 0000:02:00.0: Query for DCB configuration failed, err -EIO aq_err I40E_AQ_RC_EINVAL
> [   74.759770] i40e 0000:02:00.0: DCB init failed -5, disabled
> [   74.966550] i40e 0000:02:00.1: Query for DCB configuration failed, err -EIO aq_err I40E_AQ_RC_EINVAL
> [   74.975683] i40e 0000:02:00.1: DCB init failed -5, disabled
>
> Fixes: cf488e13221f ("i40e: Add other helpers to check version of running firmware and AQ API")
> Signed-off-by: Ivan Vecera <ivecera@...hat.com>
> ---
>  drivers/net/ethernet/intel/i40e/i40e_prototype.h | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>

Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@...el.com> (A Contingent worker at Intel)