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| author | Sebastian Ott <sebott@linux.vnet.ibm.com> | 2017-10-09 17:49:38 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2017-10-18 14:11:19 +0200 |
| commit | 94158e544fd60c6a94af348790dae76578ed8dae (patch) | |
| tree | e0281c7e55dc2e7ac77d7e1f3270d3d35c1515ac /arch/s390/kernel/debug.c | |
| parent | 7c3eaaa3917d8b5491f58ea263bf6e719fd3155f (diff) | |
| download | linux-stable-94158e544fd60c6a94af348790dae76578ed8dae.tar.gz linux-stable-94158e544fd60c6a94af348790dae76578ed8dae.tar.bz2 linux-stable-94158e544fd60c6a94af348790dae76578ed8dae.zip | |
s390/debug: improve debug_event
debug_event currently truncates the data if used with a size larger than
the buf_size of the debug feature. For lots of callers of this function,
wrappers have been implemented that loop until all data is handled.
Move that functionality into debug_event_common and get rid of the wrappers.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Acked-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/debug.c')
| -rw-r--r-- | arch/s390/kernel/debug.c | 28 |
1 files changed, 18 insertions, 10 deletions
diff --git a/arch/s390/kernel/debug.c b/arch/s390/kernel/debug.c index c960797c8a6f..df916738fbd8 100644 --- a/arch/s390/kernel/debug.c +++ b/arch/s390/kernel/debug.c @@ -900,12 +900,16 @@ debug_entry_t *debug_event_common(debug_info_t *id, int level, const void *buf, } else { spin_lock_irqsave(&id->lock, flags); } - active = get_active_entry(id); - memset(DEBUG_DATA(active), 0, id->buf_size); - memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size)); - debug_finish_entry(id, active, level, 0); - spin_unlock_irqrestore(&id->lock, flags); + do { + active = get_active_entry(id); + memset(DEBUG_DATA(active), 0, id->buf_size); + memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size)); + debug_finish_entry(id, active, level, 0); + len -= id->buf_size; + buf += id->buf_size; + } while (len > 0); + spin_unlock_irqrestore(&id->lock, flags); return active; } EXPORT_SYMBOL(debug_event_common); @@ -928,12 +932,16 @@ debug_entry_t *debug_exception_common(debug_info_t *id, int level, } else { spin_lock_irqsave(&id->lock, flags); } - active = get_active_entry(id); - memset(DEBUG_DATA(active), 0, id->buf_size); - memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size)); - debug_finish_entry(id, active, level, 1); - spin_unlock_irqrestore(&id->lock, flags); + do { + active = get_active_entry(id); + memset(DEBUG_DATA(active), 0, id->buf_size); + memcpy(DEBUG_DATA(active), buf, min(len, id->buf_size)); + debug_finish_entry(id, active, level, len <= id->buf_size); + len -= id->buf_size; + buf += id->buf_size; + } while (len > 0); + spin_unlock_irqrestore(&id->lock, flags); return active; } EXPORT_SYMBOL(debug_exception_common); |