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From: Andrew Lunn <andrew@lunn.ch>
To: Lukas Wunner <lukas@wunner.de>
Cc: "David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	netdev@vger.kernel.org, linux-usb@vger.kernel.org,
	Steve Glendinning <steve.glendinning@shawell.net>,
	UNGLinuxDriver@microchip.com, Oliver Neukum <oneukum@suse.com>,
	Andre Edich <andre.edich@microchip.com>,
	Oleksij Rempel <linux@rempel-privat.de>,
	Martyn Welch <martyn.welch@collabora.com>,
	Gabriel Hojda <ghojda@yo2urs.ro>,
	Christoph Fritz <chf.fritz@googlemail.com>,
	Lino Sanfilippo <LinoSanfilippo@gmx.de>,
	Philipp Rosenberger <p.rosenberger@kunbus.com>,
	Heiner Kallweit <hkallweit1@gmail.com>,
	Russell King <linux@armlinux.org.uk>,
	Ferry Toth <fntoth@gmail.com>
Subject: Re: [PATCH net-next v2 6/7] net: phy: smsc: Cache interrupt mask
Date: Wed, 4 May 2022 00:26:22 +0200	[thread overview]
Message-ID: <YnGsDtscYkh28PFm@lunn.ch> (raw)
In-Reply-To: <e4a5d784e47bf919873e520e0c6c5156a1ecdde7.1651574194.git.lukas@wunner.de>

On Tue, May 03, 2022 at 03:15:06PM +0200, Lukas Wunner wrote:
> Cache the interrupt mask to avoid re-reading it from the PHY upon every
> interrupt.
> 
> This will simplify a subsequent commit which detects hot-removal in the
> interrupt handler and bails out.
> 
> Analyzing and debugging PHY transactions also becomes simpler if such
> redundant reads are avoided.
> 
> Last not least, interrupt overhead and latency is slightly improved.
> 
> Tested-by: Oleksij Rempel <o.rempel@pengutronix.de> # LAN9514/9512/9500
> Tested-by: Ferry Toth <fntoth@gmail.com> # LAN9514
> Signed-off-by: Lukas Wunner <lukas@wunner.de>

Reviewed-by: Andrew Lunn <andrew@lunn.ch>

    Andrew

  reply	other threads:[~2022-05-03 22:26 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-03 13:15 [PATCH net-next v2 0/7] Polling be gone on LAN95xx Lukas Wunner
2022-05-03 13:15 ` [PATCH net-next v2 1/7] usbnet: Run unregister_netdev() before unbind() again Lukas Wunner
2022-05-03 13:15 ` [PATCH net-next v2 2/7] usbnet: smsc95xx: Don't clear read-only PHY interrupt Lukas Wunner
2022-05-03 22:20   ` Andrew Lunn
2022-05-03 13:15 ` [PATCH net-next v2 3/7] usbnet: smsc95xx: Don't reset PHY behind PHY driver's back Lukas Wunner
2022-05-03 22:21   ` Andrew Lunn
2022-05-03 13:15 ` [PATCH net-next v2 4/7] usbnet: smsc95xx: Avoid link settings race on interrupt reception Lukas Wunner
2022-05-03 22:23   ` Andrew Lunn
2022-05-03 13:15 ` [PATCH net-next v2 5/7] usbnet: smsc95xx: Forward PHY interrupts to PHY driver to avoid polling Lukas Wunner
2022-05-05 18:32   ` Jakub Kicinski
2022-05-05 18:53     ` Lukas Wunner
2022-05-06 10:58       ` Marc Zyngier
2022-05-06 20:16         ` Lukas Wunner
2022-05-09  8:47           ` Marc Zyngier
2022-05-10  8:18             ` Lukas Wunner
2022-05-11  0:27     ` [tip: irq/urgent] genirq: Remove WARN_ON_ONCE() in generic_handle_domain_irq() tip-bot2 for Lukas Wunner
2022-05-11  9:26     ` [PATCH net-next v2 5/7] usbnet: smsc95xx: Forward PHY interrupts to PHY driver to avoid polling Lukas Wunner
2022-05-11 16:15       ` Jakub Kicinski
2022-05-03 13:15 ` [PATCH net-next v2 6/7] net: phy: smsc: Cache interrupt mask Lukas Wunner
2022-05-03 22:26   ` Andrew Lunn [this message]
2022-05-03 13:15 ` [PATCH net-next v2 7/7] net: phy: smsc: Cope with hot-removal in interrupt handler Lukas Wunner
2022-05-03 22:26   ` Andrew Lunn

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