SUSE Linux Enterprise Server (SLES) 11.2 panics on shutdown when the Chelsio Fibre Channel over Ethernet (FCoE) driver is loaded - IBM System x, BladeCenter and Flex Systems
RETAIN tip: H21295
A kernel panic may be occur when shutting down SUSE Linux Enterprise Server (SLES) 11.2 and the Chelsio T440-CR Quad-Port (SFP+) 10 Gb Ethernet Peripheral Component Interconnect express (PCIe) 2.0 Adapter, Option part number 46M2241, is installed and configured for Fibre Channel over Ethernet (FCoE).
The beginning of the kernel panic output will be similar to the following:
The system is configured with one or more of the following IBM Options:
This tip is not system specific.
This tip is not software specific.
The csiostor device driver for the Chelsio T440-CR adapter is affected.
Chelsio T440-CR adapter
This behavior will be corrected in a future release of the Chelsio UWire software stack.
The target date for this release is scheduled for third quarter 2013.
The file is or will be available by selecting the appropriate Product Group, type of System, Product name, Product machine type, and Operating system on IBM Support's Fix Central web page, at the following URL:
The Chelsio FCoE driver, 'csiostor,' is not needed to support the Ethernet functions of the adapter. The 'csiostor' driver can be prevented from loading in the SUSE Linux Enterprise Server (SLES) 11.2 environment by adding it to the driver blacklist file.
The blacklist file will exist (or can be created) in the '/etc/modprobe.d' directory. The following line should be inserted into the blacklist file:
The 'csiostor' driver fails to unload gracefully during Operating System (OS) shutdown under SUSE Linux Enterprise Server (SLES) 11.2.
Preventing the driver from loading avoids the issue. The driver is unnecessary, as FCoE is not supported in this configuration.
Applicable countries and regions
Document id: MIGR-5093091