[S390] cio: Dump ccw device information in case of timeout.

Information about a ccw device will be dumped in
case of a ccw timeout. This can be enabled with
the kernel parameter ccw_timeout_log.

Signed-off-by: Sebastian Ott <sebott@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index d29b6d926a42..880f882160e2 100644
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -370,6 +370,9 @@ and is between 256 and 4096 characters. It is defined in the file
                         configured.  Potentially dangerous and should only be
                         used if you are entirely sure of the consequences.
 
+        ccw_timeout_log [S390]
+                        See Documentation/s390/CommonIO for details.
+
         checkreqprot    [SELINUX] Set initial checkreqprot flag value.
                         Format: { "0" | "1" }
                         See security/selinux/Kconfig help text.