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authorCornelia Huck <cornelia.huck@de.ibm.com>2007-07-27 12:29:20 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-07-27 12:29:20 +0200
commit303fa9e39605c1d56971dd22cd04d2186dc42c98 (patch)
treeac289a0d80136b2fb7eb6aaa7dee5e55f6cdb24a /drivers/s390/cio
parente556bbbd9d2ff2b158915945ac82e2ac7def4d2f (diff)
[S390] cio: Make CIO_* macros safe if dbfs are not available.
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio')
-rw-r--r--drivers/s390/cio/cio_debug.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/s390/cio/cio_debug.h b/drivers/s390/cio/cio_debug.h
index f88844adae1b..c9bf8989930f 100644
--- a/drivers/s390/cio/cio_debug.h
+++ b/drivers/s390/cio/cio_debug.h
@@ -23,6 +23,8 @@ extern debug_info_t *cio_debug_crw_id;
static inline void
CIO_HEX_EVENT(int level, void *data, int length)
{
+ if (unlikely(!cio_debug_trace_id))
+ return;
while (length > 0) {
debug_event(cio_debug_trace_id, level, data, length);
length -= cio_debug_trace_id->buf_size;