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| author | Cornelia Huck <cornelia.huck@de.ibm.com> | 2007-07-27 12:29:20 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2007-07-27 12:29:20 +0200 |
| commit | 303fa9e39605c1d56971dd22cd04d2186dc42c98 (patch) | |
| tree | ac289a0d80136b2fb7eb6aaa7dee5e55f6cdb24a /drivers/s390 | |
| parent | [S390] cio: Clean up messages. (diff) | |
| download | linux-303fa9e39605c1d56971dd22cd04d2186dc42c98.tar.xz linux-303fa9e39605c1d56971dd22cd04d2186dc42c98.zip | |
[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')
| -rw-r--r-- | drivers/s390/cio/cio_debug.h | 2 |
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; |