linux-kernel - Re: [PATCH 3/3] cxacru: Store all device status information and report it when atm_proc

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Message-Id: <200701311519.52023.duncan.sands@math.u-psud.fr>
Date:	Wed, 31 Jan 2007 15:19:51 +0100
From:	Duncan Sands <duncan.sands@...h.u-psud.fr>
To:	Simon Arlott <e5d74fcd64729b17de1hc0yh0003aeoo@...nder.lp0.eu>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/3] cxacru: Store all device status information and report it when atm_proc_read is called.

Hi Simon,

> +static int cxacru_proc_read(struct usbatm_data *usbatm_instance,
> +	struct atm_dev *atm_dev, loff_t * pos, char *page)
> +{
> +	struct cxacru_data *instance = usbatm_instance->driver_data;
> +	u32 *cxinf = instance->cxinf_status;
> +	int left = *pos;

if there was no successfull call to cxacru_poll_status before this,
then you will output junk.  Please initialize cxinf_status to something
sensible in cxacru_bind.

> +       if (!left--)
> +               return sprintf(page, "MAC=%02x:%02x:%02x:%02x:%02x:%02x\n",
> +                                       atm_dev->esi[0], atm_dev->esi[1],
> +                                       atm_dev->esi[2], atm_dev->esi[3],
> +                                       atm_dev->esi[4], atm_dev->esi[5]);

Rather than duplicating code in usbatm, I think it would be better to
split the various output bits in usbatm_atm_proc_read into their own
functions, and export them, so they can be called from both
usbatm_atm_proc_read and cxacru_proc_read.

Best wishes,

Duncan.
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