linux-kernel - RE: [PATCH] platform/mellanox: mlxreg-lc: fix error code in mlxreg_lc_create_static

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Date:   Wed, 10 Nov 2021 10:27:18 +0000
From:   Vadim Pasternak <vadimp@...dia.com>
To:     Dan Carpenter <dan.carpenter@...cle.com>,
        Hans de Goede <hdegoede@...hat.com>
CC:     Mark Gross <markgross@...nel.org>,
        Michael Shych <michaelsh@...dia.com>,
        "platform-driver-x86@...r.kernel.org" 
        <platform-driver-x86@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kernel-janitors@...r.kernel.org" <kernel-janitors@...r.kernel.org>
Subject: RE: [PATCH] platform/mellanox: mlxreg-lc: fix error code in
 mlxreg_lc_create_static_devices()



> -----Original Message-----
> From: Dan Carpenter <dan.carpenter@...cle.com>
> Sent: Wednesday, November 10, 2021 9:44 AM
> To: Hans de Goede <hdegoede@...hat.com>; Vadim Pasternak
> <vadimp@...dia.com>
> Cc: Mark Gross <markgross@...nel.org>; Michael Shych
> <michaelsh@...dia.com>; platform-driver-x86@...r.kernel.org; linux-
> kernel@...r.kernel.org; kernel-janitors@...r.kernel.org
> Subject: [PATCH] platform/mellanox: mlxreg-lc: fix error code in
> mlxreg_lc_create_static_devices()
> 
> This code should be using PTR_ERR() instead of IS_ERR().  And because it's
> using the wrong "dev->client" pointer, the IS_ERR() check will be false,
> meaning the function returns success.
> 
> Fixes: 62f9529b8d5c ("platform/mellanox: mlxreg-lc: Add initial support for
> Nvidia line card devices")
> Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

Acked-by: Vadim Pasternak <vadimp@...dia.com>

> ---
>  drivers/platform/mellanox/mlxreg-lc.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/platform/mellanox/mlxreg-lc.c
> b/drivers/platform/mellanox/mlxreg-lc.c
> index 0b7f58feb701..c897a2f15840 100644
> --- a/drivers/platform/mellanox/mlxreg-lc.c
> +++ b/drivers/platform/mellanox/mlxreg-lc.c
> @@ -413,7 +413,7 @@ mlxreg_lc_create_static_devices(struct mlxreg_lc
> *mlxreg_lc, struct mlxreg_hotpl
>  				int size)
>  {
>  	struct mlxreg_hotplug_device *dev = devs;
> -	int i;
> +	int i, ret;
> 
>  	/* Create static I2C device feeding by auxiliary or main power. */
>  	for (i = 0; i < size; i++, dev++) {
> @@ -423,6 +423,7 @@ mlxreg_lc_create_static_devices(struct mlxreg_lc
> *mlxreg_lc, struct mlxreg_hotpl
>  				dev->brdinfo->type, dev->nr, dev->brdinfo-
> >addr);
> 
>  			dev->adapter = NULL;
> +			ret = PTR_ERR(dev->client);
>  			goto fail_create_static_devices;
>  		}
>  	}
> @@ -435,7 +436,7 @@ mlxreg_lc_create_static_devices(struct mlxreg_lc
> *mlxreg_lc, struct mlxreg_hotpl
>  		i2c_unregister_device(dev->client);
>  		dev->client = NULL;
>  	}
> -	return IS_ERR(dev->client);
> +	return ret;
>  }
> 
>  static void
> --
> 2.20.1