Re: [PATCH] zfcp: fix reaction on bit error theshold notification with adapter close

["Martin K. Petersen" <martin.petersen@oracle.com>]

Steffen,

> Kernel message explanation:
>
>  * Description:
>  * The FCP channel reported that its bit error threshold has been exceeded.
>  * These errors might result from a problem with the physical components
>  * of the local fibre link into the FCP channel.
>  * The problem might be damage or malfunction of the cable or
>  * cable connection between the FCP channel and
>  * the adjacent fabric switch port or the point-to-point peer.
>  * Find details about the errors in the HBA trace for the FCP device.
>  * The zfcp device driver closed down the FCP device
>  * to limit the performance impact from possible I/O command timeouts.
>  * User action:
>  * Check for problems on the local fibre link, ensure that fibre optics are
>  * clean and functional, and all cables are properly plugged.
>  * After the repair action, you can manually recover the FCP device by
>  * writing "0" into its "failed" sysfs attribute.
>  * If recovery through sysfs is not possible, set the CHPID of the device
>  * offline and back online on the service element.

This commentary does not read like a patch description. It makes no
mention of the actual kernel changes and the introduced module
parameter.

> +static bool ber_stop = true;
> +module_param(ber_stop, bool, 0600);
> +MODULE_PARM_DESC(ber_stop,
> +		 "Shuts down FCP devices for FCP channels that report a bit-error count in excess of its threshold (default on)");
> +

-- 
Martin K. Petersen	Oracle Linux Engineering