On Thu, Jan 27, 2022 at 12:32:58PM +0100, Sebastian Andrzej Siewior wrote: > The i2c-i801 driver invokes i2c_handle_smbus_host_notify() from his > interrupt service routine. On PREEMPT_RT i2c-i801's handler is forced > threaded with enabled interrupts which leads to a warning by > handle_irq_event_percpu() assuming that irq_default_primary_handler() > enabled interrupts. > > i2c-i801's interrupt handler can't be made non-threaded because the > interrupt line is shared with other devices. > > Use generic_handle_irq_safe() which can invoked with disabled and enabled > interrupts. > > Reported-by: Michael Below <below@xxxxxxxx> > Link: https://bugs.debian.org/1002537 > Cc: Salvatore Bonaccorso <carnil@xxxxxxxxxx> > Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> I guess you want this to go together with patch 1, so: Acked-by: Wolfram Sang <wsa@xxxxxxxxxx> I agree with adding the kernel bugzilla entry at least: https://bugzilla.kernel.org/show_bug.cgi?id=202453 Probably the others which Oleksandr metioned, too.
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