[PATCH] ALSA: firewire-lib: fix 'function sizeof not defined' error of tracepoints format

[Takashi Iwai]

On Sun, 03 May 2020 06:57:18 +0200,
Takashi Sakamoto wrote:
> 
> The snd-firewire-lib.ko has 'amdtp-packet' event of tracepoints. Current
> printk format for the event includes 'sizeof(u8)' macro expected to be
> extended in compilation time. However, this is not done. As a result,
> perf tools cannot parse the event for printing:
> 
> $ mount -l -t debugfs
> debugfs on /sys/kernel/debug type debugfs (rw,nosuid,nodev,noexec,relatime)
> $ cat /sys/kernel/debug/tracing/events/snd_firewire_lib/amdtp_packet/format
> ...
> print fmt: "%02u %04u %04x %04x %02d %03u %02u %03u %02u %01u %02u %s",
>   REC->second, REC->cycle, REC->src, REC->dest, REC->channel,
>   REC->payload_quadlets, REC->data_blocks, REC->data_block_counter,
>   REC->packet_index, REC->irq, REC->index,
>   __print_array(__get_dynamic_array(cip_header),
>                 __get_dynamic_array_len(cip_header),
>                 sizeof(u8))
> 
> $ sudo perf record -e snd_firewire_lib:amdtp_packet
>   [snd_firewire_lib:amdtp_packet] function sizeof not defined
>   Error: expected type 5 but read 0
> 
> This commit fixes it by obsoleting the macro with actual size.
> 
> Cc: <stable at vger.kernel.org>
> Fixes: bde2bbdb307a: ("ALSA: firewire-lib: use dynamic array for CIP header of tracing events")
> Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>

Applied now with a correction of Fixes tag (removal of the superfluous
colon after commit id).


thanks,

Takashi