Then your driver is most certainly doing something wrong :-) No driver
needs that. Ever.
What is it trying to do more precisely ? I might be able to explain what
the right approach is if you can tell me what the driver is trying to
disable all system IRQs for ? Keep in mind that local_irq_save() does a
lot more than just masking external interrupts from your device. It
masks them from -all- devices, including timer interrupts, perfmon
interrupts, etc... Doing so on all cores is generally a big no-no and
almost never really necessary.
I agree with you. Actually, I can disable the individual interrupt via
disable_irq_sync() to make sure
system cooherence. It's just my concern when reading kernel source.
Anyway, thanks a lot
for your kindly answer.
Thanks,
Gavin
Cheers,
Ben.
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