netdev - RE: [Intel-wired-lan] [PATCH v2 iwl-net 3/3] ice: Reject pin requests with unsupported flags

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Date: Tue, 25 Jun 2024 07:08:08 +0000
From: "Pucha, HimasekharX Reddy" <himasekharx.reddy.pucha@...el.com>
To: "Kolacinski, Karol" <karol.kolacinski@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "Kolacinski, Karol"
	<karol.kolacinski@...el.com>, "Nguyen, Anthony L"
	<anthony.l.nguyen@...el.com>, "Kitszel, Przemyslaw"
	<przemyslaw.kitszel@...el.com>
Subject: RE: [Intel-wired-lan] [PATCH v2 iwl-net 3/3] ice: Reject pin requests
 with unsupported flags

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of Karol Kolacinski
> Sent: Thursday, June 20, 2024 5:57 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: Keller, Jacob E <jacob.e.keller@...el.com>; netdev@...r.kernel.org; Kolacinski, Karol <karol.kolacinski@...el.com>; Nguyen, Anthony L <anthony.l.nguyen@...el.com>; Kitszel, Przemyslaw <przemyslaw.kitszel@...el.com>
> Subject: [Intel-wired-lan] [PATCH v2 iwl-net 3/3] ice: Reject pin requests with unsupported flags
>
> From: Jacob Keller <jacob.e.keller@...el.com>
>
> The driver receives requests for configuring pins via the .enable callback of the PTP clock object. These requests come into the driver with flags which modify the requested behavior from userspace. Current implementation in ice does not reject flags that it doesn't support.
> This causes the driver to incorrectly apply requests with such flags as PTP_PEROUT_DUTY_CYCLE, or any future flags added by the kernel which it is not yet aware of.
>
> Fix this by properly validating flags in both ice_ptp_cfg_perout and ice_ptp_cfg_extts. Ensure that we check by bit-wise negating supported flags rather than just checking and rejecting known un-supported flags.
> This is preferable, as it ensures better compatibility with future kernels.
>
> Fixes: 172db5f91d5f ("ice: add support for auxiliary input/output pins")
> Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@...el.com>
> Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> Signed-off-by: Karol Kolacinski <karol.kolacinski@...el.com>
> ---
> V1 -> V2: adjusted indentation and added NULL config pointer check
>
>  drivers/net/ethernet/intel/ice/ice_ptp.c | 38 ++++++++++++++----------  drivers/net/ethernet/intel/ice/ice_ptp.h |  1 +
>  2 files changed, 23 insertions(+), 16 deletions(-)
>

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