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From: Jakub Kicinski <kuba@kernel.org>
To: Michael Chan <michael.chan@broadcom.com>,
	Richard Cochran <richardcochran@gmail.com>
Cc: davem@davemloft.net, netdev@vger.kernel.org, gospo@broadcom.com
Subject: Re: [PATCH net 8/9] bnxt_en: Move bnxt_ptp_init() to bnxt_open()
Date: Mon, 19 Jul 2021 12:43:23 +0200	[thread overview]
Message-ID: <20210719124323.085fa184@cakuba> (raw)
In-Reply-To: <1626636993-31926-9-git-send-email-michael.chan@broadcom.com>

On Sun, 18 Jul 2021 15:36:32 -0400, Michael Chan wrote:
> The device needs to be in ifup state for PTP to function, so move
> bnxt_ptp_init() to bnxt_open().  This means that the PHC will be
> registered during bnxt_open().

I think it's an anti-pattern to have the clock registered only when
the device is up. Right, Richard?

IIRC Intel parts did it in the past because they had the clock hooked
up to the MAC/PHY so the clock was not actually ticking. But seems like
a wrong trade off to unreg PTP for SW convenience. Or maybe I'm
biased against the live FW reset :) Let's see if Richard agrees.

> This also makes firmware reset work correctly.  PTP configurations
> may change after firmware upgrade or downgrade.  bnxt_open() will
> be called after firmware reset, so it will work properly.
> 
> bnxt_ptp_start() is now incorporated into bnxt_ptp_init().  We now
> also need to call bnxt_ptp_clear() in bnxt_close().

  reply	other threads:[~2021-07-19 10:43 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-18 19:36 [PATCH net 0/9] bnxt_en: Bug fixes Michael Chan
2021-07-18 19:36 ` [PATCH net 1/9] bnxt_en: don't disable an already disabled PCI device Michael Chan
2021-07-18 19:36 ` [PATCH net 2/9] bnxt_en: reject ETS settings that will starve a TC Michael Chan
2021-07-18 19:36 ` [PATCH net 3/9] bnxt_en: Refresh RoCE capabilities in bnxt_ulp_probe() Michael Chan
2021-07-18 19:36 ` [PATCH net 4/9] bnxt_en: Add missing check for BNXT_STATE_ABORT_ERR in bnxt_fw_rset_task() Michael Chan
2021-07-18 19:36 ` [PATCH net 5/9] bnxt_en: fix error path of FW reset Michael Chan
2021-07-18 19:36 ` [PATCH net 6/9] bnxt_en: Validate vlan protocol ID on RX packets Michael Chan
2021-07-18 19:36 ` [PATCH net 7/9] bnxt_en: Check abort error state in bnxt_half_open_nic() Michael Chan
2021-07-18 19:36 ` [PATCH net 8/9] bnxt_en: Move bnxt_ptp_init() to bnxt_open() Michael Chan
2021-07-19 10:43   ` Jakub Kicinski [this message]
2021-07-19 17:07     ` Richard Cochran
2021-07-20  5:29       ` Michael Chan
2021-07-18 19:36 ` [PATCH net 9/9] bnxt_en: Fix PTP capability discovery Michael Chan
2021-07-19 16:00 ` [PATCH net 0/9] bnxt_en: Bug fixes patchwork-bot+netdevbpf

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