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re: ncr53c9x fallout from asserting kernel lock in scsipi_base
> On Fri, Mar 09, 2012 at 02:49:43PM +0000, Julian Coleman wrote:
> > Hi,
> > After the change in revision 1.156 of src/sys/dev/scsipi/scsipi_base.c to
> > assert that the kernel lock is held in scsipi_lookup_periph(), my SBus-based
> > sparc64 crashed with:
> > panic: kernel diagnostic assertion "KERNEL_LOCKED_P()" failed: file
> > "/usr/src/sys/dev/scsipi/scsipi_base.c", line 221
> > The backtrace is:
> > kern_assert
> > scsipi_lookup_periph
> > scsipi_async_event
> > ncr53c9x_update_xfer_mode
> > ncr53c9x_init
> > ncr53c9x_attach
> > The attached allows it to boot and run, but is it correct?
> assuming ncr53c9x is MP-safe, it is correct.
it isn't, but these happen during the non-interrupt driven autoconfig
phase and kernel lock isn't held here.
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