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From: Andrew Lunn <andrew@lunn.ch>
To: "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@oss.nxp.com>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
	christian.herber@nxp.com, hkallweit1@gmail.com,
	linux@armlinux.org.uk, davem@davemloft.net, kuba@kernel.org
Subject: Re: [PATCH 3/3] phy: nxp-c45-tja11xx: read the tx timestamp without lock
Date: Mon, 20 Dec 2021 16:10:43 +0100	[thread overview]
Message-ID: <YcCc84XAlckpTnkF@lunn.ch> (raw)
In-Reply-To: <20211220120859.140453-3-radu-nicolae.pirea@oss.nxp.com>

On Mon, Dec 20, 2021 at 02:08:59PM +0200, Radu Pirea (NXP OSS) wrote:
> The tx timestamps are read from only one place in interrupt or polling
> mode. Locking the mutex is useless.

You cannot take a mutex in an interrupt handler. So your description
is probably not accurate.

Is it safe for other ptp operations to be performed in parallel with
reading the TX timestamp? _nxp_c45_ptp_settime64()?

	Andrew

  reply	other threads:[~2021-12-20 15:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-20 12:08 [PATCH 1/3] ptp: add PTP_PEROUT_REVERSE_POLARITY flag Radu Pirea (NXP OSS)
2021-12-20 12:08 ` [PATCH 2/3] phy: nxp-c45-tja11xx: add extts and perout support Radu Pirea (NXP OSS)
2021-12-20 12:08 ` [PATCH 3/3] phy: nxp-c45-tja11xx: read the tx timestamp without lock Radu Pirea (NXP OSS)
2021-12-20 15:10   ` Andrew Lunn [this message]
2021-12-22  8:19     ` Radu Nicolae Pirea (NXP OSS)
2021-12-20 15:04 ` [PATCH 1/3] ptp: add PTP_PEROUT_REVERSE_POLARITY flag Andrew Lunn

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