linux-kernel - Re: [PATCH v3 5/9] i2c-mlxbf.c: support lock mechanism

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Message-ID: <YyYRGuXeXAT4FH0L@shikoro>
Date:   Sat, 17 Sep 2022 20:25:30 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     Asmaa Mnebhi <asmaa@...dia.com>
Cc:     linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org,
        Khalil Blaiech <kblaiech@...dia.com>
Subject: Re: [PATCH v3 5/9] i2c-mlxbf.c: support lock mechanism


> +	/* Try to acquire the smbus gw lock before any reads of the GW register since
> +	 * a read sets the lock.
> +	 */

Please use kernel multiline comment style.

> @@ -792,6 +824,8 @@ mlxbf_i2c_smbus_start_transaction(struct mlxbf_i2c_priv *priv,
>  			priv->smbus->io + MLXBF_I2C_SMBUS_MASTER_FSM);
>  	}

Dunno if this is taste, but I think it is easier to follow the locking
when we have central acquire and release points for it. So, I'd suggest
to add something like

out_unlock:

here and then goto to this place from the other locations.

What do you think?

>  
> +	mlxbf_i2c_smbus_master_unlock(priv);
> +
>  	return ret;

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