Javen,
My driver uses ddi_get32()/ddi_put32() to read/write
The mapped PCI registers of HBA hardware. Here are
Questions.
(1) Is it safe to use ddi_getxx()/ddi_putxx() while
holding the driver mutex. The sample code seems OK
to use but DOC said avoid that since it will block
kmem_alloc() ?
(2) If driver command running is not busy, the data read
back from ddi_getxx() is correct but if command running
is heavy, sometimes the ddi_getxx() returned value is
not valid which causes panic. I read it from interrupt
ISR and the handler and address pointer for ddi_getxx()
are correct. What could be wrong?
Can you give me some advices? Thanks
Steve
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