From: Andrew Lunn <andrew@lunn.ch>
To: "Radu Pirea (NXP OSS)" <radu-nicolae.pirea@oss.nxp.com>
Cc: hkallweit1@gmail.com, linux@armlinux.org.uk, davem@davemloft.net,
edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
richardcochran@gmail.com, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org, sebastian.tobuschat@nxp.com,
stable@vger.kernel.org
Subject: Re: [PATCH net-next v1 01/14] net: phy: nxp-c45-tja11xx: fix the PTP interrupt enablig/disabling
Date: Fri, 16 Jun 2023 22:36:46 +0200 [thread overview]
Message-ID: <5f47ee8c-6a84-4449-9331-1895e4a612d9@lunn.ch> (raw)
In-Reply-To: <20230616135323.98215-2-radu-nicolae.pirea@oss.nxp.com>
On Fri, Jun 16, 2023 at 04:53:10PM +0300, Radu Pirea (NXP OSS) wrote:
> .config_intr() handles only the link event interrupt and should
> disable/enable the PTP interrupt also.
>
> It's safe to disable/enable the PTP irq even if the egress ts irq
> is disabled. This interrupt, the PTP one, acts as a global switch for all
> PTP irqs.
>
> Fixes: 514def5dd339 ("phy: nxp-c45-tja11xx: add timestamping support")
> CC: stable@vger.kernel.org # 5.15+
> Signed-off-by: Radu Pirea (NXP OSS) <radu-nicolae.pirea@oss.nxp.com>
Please don't mix fixes and development work in one patchset. Please
post this to applying to net, not net-next.
> static int nxp_c45_config_intr(struct phy_device *phydev)
> {
> - if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
> + /* The return value is ignored on purpose. It might be < 0.
> + * 0x807A register is not present on SJA1110 PHYs.
> + */
> + if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
> + phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
> + VEND1_PORT_FUNC_IRQ_EN, PTP_IRQS);
> return phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
> VEND1_PHY_IRQ_EN, PHY_IRQ_LINK_EVENT);
phy_set_bits_mmd() will not return an error if the register does not
exist. There is no such indication for MDIO. This is going to do a
read/modify/write. That read might get 0xffff, or random junk. And
then the write back will be successful. The only time
phy_read()/phy_write return error is when there is a problem within
the bus master, like its clock gets turned off and the transfer times
out.
So it is good to document you are accessing a register which might not
exist, but there is no need to ignore the return code.
Andrew
next prev parent reply other threads:[~2023-06-16 20:37 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-16 13:53 [PATCH net-next v1 00/14] Add TJA1120 support Radu Pirea (NXP OSS)
2023-06-16 13:53 ` [PATCH net-next v1 01/14] net: phy: nxp-c45-tja11xx: fix the PTP interrupt enablig/disabling Radu Pirea (NXP OSS)
2023-06-16 20:36 ` Andrew Lunn [this message]
2023-06-19 8:42 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 02/14] net: phy: nxp-c45-tja11xx: use phylib master/slave implementation Radu Pirea (NXP OSS)
2023-06-16 20:37 ` Andrew Lunn
2023-06-16 13:53 ` [PATCH net-next v1 03/14] net: phy: nxp-c45-tja11xx: remove RX BIST frame counters Radu Pirea (NXP OSS)
2023-06-16 20:39 ` Andrew Lunn
2023-06-22 12:21 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 04/14] net: phy: nxp-c45-tja11xx: add *_reg_field functions Radu Pirea (NXP OSS)
2023-06-16 20:42 ` Andrew Lunn
2023-06-16 13:53 ` [PATCH net-next v1 05/14] net: phy: nxp-c45-tja11xx: prepare the ground for TJA1120 Radu Pirea (NXP OSS)
2023-06-16 19:35 ` Simon Horman
2023-06-19 7:53 ` Horatiu Vultur
2023-06-16 13:53 ` [PATCH net-next v1 06/14] net: phy: add 1000baseT1 to phy_basic_t1_features Radu Pirea (NXP OSS)
2023-06-16 20:49 ` Andrew Lunn
2023-06-19 11:01 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 07/14] net: phy: nxp-c45-tja11xx: add TJA1120 support Radu Pirea (NXP OSS)
2023-06-16 13:53 ` [PATCH net-next v1 08/14] net: phy: nxp-c45-tja11xx: enable LTC sampling on both ext_ts edges Radu Pirea (NXP OSS)
2023-06-19 8:10 ` Horatiu Vultur
2023-06-19 8:36 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 09/14] net: phy: nxp-c45-tja11xx: read egress ts on TJA1120 Radu Pirea (NXP OSS)
2023-06-16 13:53 ` [PATCH net-next v1 10/14] net: phy: nxp-c45-tja11xx: handle FUSA irq Radu Pirea (NXP OSS)
2023-06-16 20:55 ` Andrew Lunn
2023-06-19 6:31 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 11/14] net: phy: nxp-c45-tja11xx: run cable test with the PHY in test mode Radu Pirea (NXP OSS)
2023-06-16 13:53 ` [PATCH net-next v1 12/14] net: phy: nxp-c45-tja11xx: read ext trig ts TJA1120 Radu Pirea (NXP OSS)
2023-06-19 8:49 ` Horatiu Vultur
2023-06-19 10:07 ` Radu Pirea (OSS)
2023-06-19 10:48 ` Horatiu Vultur
2023-06-20 14:31 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 13/14] net: phy: nxp-c45-tja11xx: reset PCS if the link goes down Radu Pirea (NXP OSS)
2023-06-16 21:00 ` Andrew Lunn
2023-06-19 6:17 ` Radu Pirea (OSS)
2023-06-16 13:53 ` [PATCH net-next v1 14/14] net: phy: nxp-c45-tja11xx: timestamp reading workaround for TJA1120 Radu Pirea (NXP OSS)
2023-06-19 8:58 ` Horatiu Vultur
2023-06-19 9:46 ` Radu Pirea (OSS)
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