firewire: ohci: add tracepoints event for hardIRQ event

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1394 OHCI hardware triggers PCI interrupts to notify any events to
software. Current driver for the hardware is programmed by the typical
way to utilize top- and bottom- halves, thus it has a timing gap to handle
the notification in softIRQ (tasklet).

This commit adds a tracepoint event for the hardIRQ event. The comparison
of the tracepoint event to tracepoints events in firewire subsystem is
helpful to diagnose the timing gap.

Link: https://lore.kernel.org/r/20240625031806.956650-3-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>

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This commit is contained in:

Takashi Sakamoto 2024-06-25 12:18:06 +09:00

parent 001c1ff5dc

commit 0d8914165d

2 changed files with 33 additions and 1 deletions

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1

drivers/firewire/ohci.c

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33

include/trace/events/firewire_ohci.h

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