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

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)");