linux-kernel - RE: [PATCH net-next 08/13] net: fec: fec_probe(): let IRQ name reflect its function

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Message-ID:
 <PAXPR04MB8510AF4C75634866A296519988472@PAXPR04MB8510.eurprd04.prod.outlook.com>
Date: Thu, 17 Oct 2024 03:12:08 +0000
From: Wei Fang <wei.fang@....com>
To: Marc Kleine-Budde <mkl@...gutronix.de>, Shenwei Wang
	<shenwei.wang@....com>, Clark Wang <xiaoning.wang@....com>, "David S. Miller"
	<davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
	<kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Richard Cochran
	<richardcochran@...il.com>
CC: "imx@...ts.linux.dev" <imx@...ts.linux.dev>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "kernel@...gutronix.de"
	<kernel@...gutronix.de>
Subject: RE: [PATCH net-next 08/13] net: fec: fec_probe(): let IRQ name
 reflect its function

> -----Original Message-----
> From: Marc Kleine-Budde <mkl@...gutronix.de>
> Sent: 2024年10月17日 5:52
> To: Wei Fang <wei.fang@....com>; Shenwei Wang <shenwei.wang@....com>;
> Clark Wang <xiaoning.wang@....com>; David S. Miller
> <davem@...emloft.net>; Eric Dumazet <edumazet@...gle.com>; Jakub
> Kicinski <kuba@...nel.org>; Paolo Abeni <pabeni@...hat.com>; Richard
> Cochran <richardcochran@...il.com>
> Cc: imx@...ts.linux.dev; netdev@...r.kernel.org; linux-kernel@...r.kernel.org;
> kernel@...gutronix.de; Marc Kleine-Budde <mkl@...gutronix.de>
> Subject: [PATCH net-next 08/13] net: fec: fec_probe(): let IRQ name reflect its
> function
> 
> The FEC IP core in the i.MX7 and newer SoCs has 4 IRQs. The first 3
> correspond to the 3 RX/TX queues, the 4th is for processing Pulses Per
> Second. In addition, the 1st IRQ handles the remaining IRQ sources of
> the IP core. They are all displayed with the same name in
> /proc/interrupts:
> 
> | 208:          0          0          0          0     GICv3 150
> Level     30be0000.ethernet
> | 209:          0          0          0          0     GICv3 151
> Level     30be0000.ethernet
> | 210:       3898          0          0          0     GICv3 152
> Level     30be0000.ethernet
> | 211:          0          0          0          0     GICv3 153
> Level     30be0000.ethernet
> 
> For easier debugging make the name of the IRQ reflect its function.
> Use the postfix "-RxTx" and the queue number for the first 3 IRQs, add
> "+misc" for the 1st IRQ. The postfix "-PPS" specifies the PPS IRQ.
> 
> With this change /proc/interrupts looks like this:
> 
> | 208:          2          0          0          0     GICv3 150
> Level     30be0000.ethernet-RxTx1
> | 209:          0          0          0          0     GICv3 151
> Level     30be0000.ethernet-RxTx2
> | 210:       3526          0          0          0     GICv3 152
> Level     30be0000.ethernet-RxTx0+misc
> | 211:          0          0          0          0     GICv3 153
> Level     30be0000.ethernet-PPS
> 
> Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
> ---
>  drivers/net/ethernet/freescale/fec_main.c | 9 ++++++++-
>  drivers/net/ethernet/freescale/fec_ptp.c  | 5 ++++-
>  2 files changed, 12 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/freescale/fec_main.c
> b/drivers/net/ethernet/freescale/fec_main.c
> index
> f124ffe3619d82dc089f8494d33d2398e6f631fb..c8b2170735e599cd1049216
> 9ab32d0e20b28311b 100644
> --- a/drivers/net/ethernet/freescale/fec_main.c
> +++ b/drivers/net/ethernet/freescale/fec_main.c
> @@ -4492,8 +4492,15 @@ fec_probe(struct platform_device *pdev)
>  		goto failed_init;
> 
>  	for (i = 0; i < irq_cnt; i++) {
> +		const char *dev_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
> "%s-RxTx%d%s",
> +						      pdev->name, i, i == 0 ? "+misc" : "");
>  		int irq_num;
> 
> +		if (!dev_name) {
> +			ret = -ENOMEM;
> +			goto failed_irq;
> +		}
> +
>  		if (fep->quirks & FEC_QUIRK_DT_IRQ2_IS_MAIN_IRQ)
>  			irq_num = (i + irq_cnt - 1) % irq_cnt;
>  		else
> @@ -4508,7 +4515,7 @@ fec_probe(struct platform_device *pdev)
>  			goto failed_irq;
>  		}
>  		ret = devm_request_irq(&pdev->dev, irq, fec_enet_interrupt,
> -				       0, pdev->name, ndev);
> +				       0, dev_name, ndev);
>  		if (ret)
>  			goto failed_irq;
> 
> diff --git a/drivers/net/ethernet/freescale/fec_ptp.c
> b/drivers/net/ethernet/freescale/fec_ptp.c
> index
> 8722f623d9e47e385439f1cee8c677e2b95b236d..0ac89fed366a83bcbfc900e
> a4409f4e98c4e14da 100644
> --- a/drivers/net/ethernet/freescale/fec_ptp.c
> +++ b/drivers/net/ethernet/freescale/fec_ptp.c
> @@ -749,8 +749,11 @@ void fec_ptp_init(struct platform_device *pdev, int
> irq_idx)
>  	 * only the PTP_CLOCK_PPS clock events should stop
>  	 */
>  	if (irq >= 0) {
> +		const char *dev_name = devm_kasprintf(&pdev->dev, GFP_KERNEL,
> +						      "%s-PPS", pdev->name);
> +
>  		ret = devm_request_irq(&pdev->dev, irq, fec_pps_interrupt,
> -				       0, pdev->name, ndev);
> +				       0, dev_name ? dev_name : pdev->name, ndev);
>  		if (ret < 0)
>  			dev_warn(&pdev->dev, "request for pps irq failed(%d)\n",
>  				 ret);
> 
> --
> 2.45.2
> 

Great, thanks!

Reviewed-by: Wei Fang <wei.fang@....com>