linux-kernel - Re: [PATCH v2 11/28] soc: fsl: cpm1: qmc: Remove no more needed checks from qmc_check

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Date:   Tue, 8 Aug 2023 08:05:40 +0000
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Herve Codina <herve.codina@...tlin.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>, Lee Jones <lee@...nel.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Qiang Zhao <qiang.zhao@....com>, Li Yang <leoyang.li@....com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Shengjiu Wang <shengjiu.wang@...il.com>,
        Xiubo Li <Xiubo.Lee@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Nicolin Chen <nicoleotsuka@...il.com>,
        Randy Dunlap <rdunlap@...radead.org>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-gpio@...r.kernel.org" <linux-gpio@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        Thomas Petazzoni <thomas.petazzoni@...tlin.com>
Subject: Re: [PATCH v2 11/28] soc: fsl: cpm1: qmc: Remove no more needed
 checks from qmc_check_chans()



Le 26/07/2023 à 17:02, Herve Codina a écrit :
> The newly introduced qmc_chan_setup_tsa* functions check that the
> channel entries are not already used.
> These checks are also performed by qmc_check_chans() and are no more
> needed.
> 
> Remove them from qmc_check_chans().
> 
> Signed-off-by: Herve Codina <herve.codina@...tlin.com>

Reviewed-by: Christophe Leroy <christophe.leroy@...roup.eu>

> ---
>   drivers/soc/fsl/qe/qmc.c | 20 --------------------
>   1 file changed, 20 deletions(-)
> 
> diff --git a/drivers/soc/fsl/qe/qmc.c b/drivers/soc/fsl/qe/qmc.c
> index c5552a0b5b19..33761c39aee1 100644
> --- a/drivers/soc/fsl/qe/qmc.c
> +++ b/drivers/soc/fsl/qe/qmc.c
> @@ -884,10 +884,7 @@ EXPORT_SYMBOL(qmc_chan_reset);
>   static int qmc_check_chans(struct qmc *qmc)
>   {
>   	struct tsa_serial_info info;
> -	bool is_one_table = false;
>   	struct qmc_chan *chan;
> -	u64 tx_ts_mask = 0;
> -	u64 rx_ts_mask = 0;
>   	u64 tx_ts_assigned_mask;
>   	u64 rx_ts_assigned_mask;
>   	int ret;
> @@ -911,7 +908,6 @@ static int qmc_check_chans(struct qmc *qmc)
>   			dev_err(qmc->dev, "Number of TSA Tx/Rx TS assigned are not equal\n");
>   			return -EINVAL;
>   		}
> -		is_one_table = true;
>   	}
>   
>   	tx_ts_assigned_mask = info.nb_tx_ts == 64 ? U64_MAX : (((u64)1) << info.nb_tx_ts) - 1;
> @@ -922,27 +918,11 @@ static int qmc_check_chans(struct qmc *qmc)
>   			dev_err(qmc->dev, "chan %u uses TSA unassigned Tx TS\n", chan->id);
>   			return -EINVAL;
>   		}
> -		if (tx_ts_mask & chan->tx_ts_mask) {
> -			dev_err(qmc->dev, "chan %u uses an already used Tx TS\n", chan->id);
> -			return -EINVAL;
> -		}
>   
>   		if (chan->rx_ts_mask > rx_ts_assigned_mask) {
>   			dev_err(qmc->dev, "chan %u uses TSA unassigned Rx TS\n", chan->id);
>   			return -EINVAL;
>   		}
> -		if (rx_ts_mask & chan->rx_ts_mask) {
> -			dev_err(qmc->dev, "chan %u uses an already used Rx TS\n", chan->id);
> -			return -EINVAL;
> -		}
> -
> -		if (is_one_table && (chan->tx_ts_mask != chan->rx_ts_mask)) {
> -			dev_err(qmc->dev, "chan %u uses different Rx and Tx TS\n", chan->id);
> -			return -EINVAL;
> -		}
> -
> -		tx_ts_mask |= chan->tx_ts_mask;
> -		rx_ts_mask |= chan->rx_ts_mask;
>   	}
>   
>   	return 0;